Eshala

 Q41.The portion of the myofibril between two successive 'Z' lines is called 

(1) Sarcoplasm 

(2) Sarcolemma 

(3) Sarcomere 

(4) Sarcosome 

Ans.3

-----------------------------------------

Q42.Which type of joint is seen between carpals? 

(1) Saddle joint 

(2) Gliding joint 

(3) Ball & socket joint 

(4) Pivot joint 

Ans.2

------------------------------------------

Q43.Patella, the knee cap bone 

(1) Sesamoid bone 

(2) Replacing bone 

(3) Investing bone 

(4) Endochondral bone 

Ans.1

-----------------------------------------

Q44.What amount of lactic acid is converted into glycogen during Cori's cycle? 

(1) 1/5th 

(2) 3/5th 

(3) 4/5th 

(4) 2/5 th

Ans.3

------------------------------------

Q45.Which of the following bone of the skull has a cavity to lodge pituitary gland in it? 

(1) Ethmoid 

(2) Sphenoid 

(3) Occipital 

(4) Parietal 

Ans.2

----------------------------------

Q46.Each muscle fibre is surrounded by connective tissue sheath called 

(1) Endomysium 

(2) Perimysium 

(3) Epimysium 

(4) Fascia 

Ans.1

---------------------------------

Q47.Which of the following statement is not true regarding A-band? 

(1) Middle part contains M-line 

(2) Length remains constant during the muscle contraction 

(3) Includes H-zone and M-line 

(4) Has thick filaments only 

Ans.4

----------------------------------

Q48.Which of the following muscle disorder occurs due to formation of defective antibodies? 

(1) Osteoarthritis 

(2) Myasthenia gravis 

(3) Muscular dystrophy 

(4) Hypertrophy 

Ans.2

---------------------------------------

Q49. When a muscle fibre contracts, it contracts maximally. This idea supports 

(1) Single muscle twitch 

(2) All or none principle 

(3) Muscle fatigue 

(4) Rigor mortis

Ans.2

-----------------------------------------

Q50.Which joints do not allow any movement? 

(1) Cartilaginous joints 

(2) Fibrous joints 

(3) Synovial joints 

(4) Saddle joints 

Ans.2

 Q31.Intervertebral discs are the joints between bodies of adjacent vertebrae. This is an example of 

(1)Cartilaginous joint 

(2) Fibrous joint 

(3) Saddle joint 

(4) Gliding joint 

Ans.1

-----------------------------------

Q32.Decreased level of estrogen in the females after menopause is implicated as a common causative factor of

(1) Osteoarthritis

(2) Osteoporosis

(3) Rheumatoid arthritis

(4) Muscular dystrophy

Ans.2

--------------------------------------

Q33.A slightly elevated ridge called, 'spine' which terminates as a flat 'acromian process' is present on 

(1) Ventral surface of scapula 

(2) Dorsal surface of scapula 

(3) Lateral surface of pubis 

(4) Centrum of thoracic vertebrae 

Ans.2

-----------------------------------

Q34.The central part of thick filament, not overlapped by thin filaments when a muscle is in relaxed state is is called 

(1) A-zone 

(2) I-zone 

(3) H-zone 

(4) O-zone 

Ans.3

--------------------------------------

Q35.Which of the following ion is essential for muscle contraction? 

(1) Na 

(2) K 

(3) Ca 

(4) CI 

Ans.3

---------------------------------------

Q36. Each arm of human is made of 

(1) 30 bones 

(2) 20 bones 

(3) 60 bones 

(4) 15 bones 

Ans.1

--------------------------------------

Q37.Which of following is not an example of synovial joint? 

(1) Joint between humerus and pectoral girdle 

(2) Joint between atlas and axis 

(3) Joint between adjacent vertebrae 

(4)  Knee joint 

Ans.3

-----------------------------------------

Q38.Rapid spasms (wild contractions) in muscle due to low Ca in body fluid 

(1) Myasthenia gravis 

(2) Muscular dystrophy

(3)  Tetany 

(4) Arthritis 

Ans.3

----------------------------------------------

Q39.Arrange the following steps in a sequence occurring during muscle contraction 

(a) Release of calcium ion into sarcoplasm

(b) Binding of calcium with a subunit of troponin on actin filaments 

(c) Neural signal reaching neuromuscular junction releases acetylcholine 

(d) Action potential generated in sarcolemma of muscle fibre 

(e) Myosin head binds to exposed active sites on actin to form cross bridge 

(1) (a), (b), (c), (d), (e)

(2) (c), (d), (a), (b), (e) 

(3) (c), (a), (b), (d), (e)

(4) (b), (d), (c), (a), (e)

Ans.2

-----------------------------------------

Q40.Number of lumbar vertebrae in human skeleton is 

(1) 12 

(2) 7 

(3) 5 

(4) 2 

Ans.3

-------------------------------------------

 Q21.The neurotransmitter usually released between a motor neuron and muscle cell is

(1) Serotonin 

(2) Dopamine 

(3) GABA 

(4) Acetylcholine 

Ans.4

-----------------------------------

Q22.Complete the analogy w.r.t. each human limb Carpals: 8:: Tarsals: 

(1) 16 

(2) 8 

(3) 14  

(4) 7 

Ans.4

--------------------------------------------

Q23.Read the following statements and choose the correct option  

(1) There are 12 pairs of thoracic vertebrae in man 

(2) White muscle fibres contain a higher amount of oxygen storing protein than red muscle fibres. 

(3) A muscle twitch is a single action potential causing brief contraction and then relaxation 

(4) Sternum is present on the dorsal side of the body in humans 

Ans.3

-------------------------------------

Q24.A single, U-shaped bone present at the base of the buccal cavity is 

(1) Hyoid 

(2) Sphenoid 

(3) Mandible 

(4) Occipital 

Ans.1

 -------------------------------------

Q25.How many of the following cannot be considered as function(s) of the skeletal system?

(1) Support for locomotion

(2) Protection from enemies

(3) Source of minerals

(4) Production of blood cells

Choose the correct option 

(1) Two 

(2) One 

(3) Four

(4) Zero

Ans.4

-----------------------------------

Q26.Cytoplasmic streaming, a characteristic of Amoeba and white blood cells of vertebrates is caused by 

(1) Sliding microtubules

(2) Elongating cell walls 

(3) Contracting microfilaments 

(4) Relaxing microtubules 

Ans. 3

-----------------------------------

Q27.The regulatory protein of skeletal muscles whose filaments run close to the F-actin throughout its length is 

(1) Troponin T 

(2) Troponin C 

(3) Titin 

(4) Tropomyosin

Ans.4

------------------------------------

 Q28.An active ATPase activity and binding site for ATP and actin filaments are found on 

(1) Light meromyosin 

(2) Short tail of heavy meromyosin 

(3) Globular head of heavy meromyosin 

(4) Long tail of the meromyosin monomer

Ans.3

-----------------------------------

 Q29.Progressive degeneration of skeletal muscle mostly due to genetic disorder is

(1) Muscular dystrophy 

(2) Tetany 

(3) Gout 

(4) Arthritis 

Ans.1

---------------------------------

Q30.Visceral muscles are also known as 

(1) Voluntary striated muscles 

(2) Voluntary non-striated muscles 

(3) Involuntary non-striated muscles. 

(4) Involuntary striated muscles

Ans.3

 Q11.Globular regulatory protein of skeletal muscle fibres is 

(1) Tropomyosin 

(2) Myosin 

(3) Actin 

(4) Troponin 

Ans.4

-----------------------------------

Q12.Which of the following is not an auto immune disorde 

(1) Simple gout 

(2) Rheumatoid arthritis 

(3) Myasthenia gravis 

(4) Multiple sclerosis 

Ans.1

---------------------------------

Q13.Property common to muscular and neural tissues is 

(1) Elasticity 

(2) Extensibility 

(3) Contractility 

(4) Excitability 

Ans 4

---------------------------------------

Q14.Read the given features. 

a. Absence of sarcomere 

b. Presence of nucleus 

c. Syncytial appearance 

d. Presence of gap junctions Choose the option that reflects features of muscle fibres located in inner walls of reproductive tract.   

(1) a & b only 

(2) a, b & d 

(3) c & d only 

(4) a, b, c & d 

Ans .2

-----------------------------------

Q15.Dimensions of which of the following remains unaffected when skeletal muscle fibres are in maximally contracted state

(1)Region between two Z lines 

(2) Anisotropic band 

(3) Isotropic band 

(4) 'H' zone 

Ans.2

------------------------------------------

Q16.Red muscle fibres differ from white muscle fibres as 

(1) Former contains large quantities of oxygen binding pigment hemoglobin 

(2) Latter has larger amount of sarcoplasmic reticulum than former 

(3) Former are unbranched and multinucleated while latter are not 

(4) Latter are responsible for aerobic respiration while former undergo only anaerobic respiration 

Ans.2

---------------------------------------

Q17.Locomotory structures in macrophages found in sem tissues are

(1) Flagella

(2) Cilia 

(3) Stereocilia 

(4) Pseudopodia 

Ans.4

------------------------------------

Q18.'I'am primarily involved in locomotory actions and changes of body postures. 'I' have striped muscle fibres when observed through the microscope and my activities are under the voluntary control of the nervous system. Who am '1'?

(1) Cardiac muscles 

(2) Iris 

(3) Biceps 

(4) Visceral muscles 

Ans.3

---------------------------------

Q19.Sliding filament model of muscle contraction suggests that, the polymerised molecules the move to shorten & muscle as those of 

(1) Troponin 

(2) Collagen

(3) Actin

(4) Myosin

Ans.3

---------------------------------------

Q20.lons essential for muscle contraction are stored in 

(1) Sarcoplasm  

(2) Sarcoplasmic reticulum 

(3) Sphaerosomes 

(4) Sarcosomes 

Ans.2 

------------------------------------

 LOCOMOTION  AND  MOVEMENT 

Q1. Type of joint where flat skull bones fuse end to end with the help of dense fibrous connective tissue is called 

(1) Synovial joint

(2) Gliding joint 

(3) Fibrous joint 

(4) Cartilaginous joint

Ans.3

-------------------------------------------

 Q2. The flat bone of axial skeleton lying on the ventral midline of thorax is  

(1) Ribs

(2) Sternum

(3) Clavicle 

(4) Hyoid

Ans.2

-----------------------------------------

Q3. Bone not a part of appendicular skeleton is 

(1) Sphenoid 

(2) Scapula

(3) Patella 

(4) Pubis

Ans.1

------------------------------------

Q4.. Select the correct match between the bones in humans listed in column I with their corresponding number in column ll

        Column l.             Column ll

(1) Facial bones.      -14

(2) Bones in axial skeleton -206 

(3) Zygomatic bone - 1 

(4) Mandible.             - 2

Ans.1

--------------------------------------

Q5. Read the given statements. Statement-l : Each coxal bone in man is formed by the fusion of three bones namely ilium, ischium and pubis.

Statement-ll : At the point of fusion of the above listed bones is a cavity called glenoid, with which the thigh bone articulates. Select the correct option

(1) Statement II is correct

(2) Statement I is incorrect

(3) Both statement I and II are correct  

(4) Statement I is correct while statement incorrect 

Ans.4

  ----------------------------------

Q.6 Knee joint and elbow joint are examples of

(1) Pivot joint 

(2) Gliding joint

(3) Saddle joint Hinge joint 

(4) Hinge joint

Ans.4

----------------------------------------

Q7. Which one of the following is the correc description of the given part of human skeleton? 

 (1) The 9th and 10th pairs of ribs are called vertebrosternal ribs

 (2) First vertebra is atlas which articulates with the occipital condyles

 (3) Each pectoral girdle comprises one clavicle and one scapula

 (4) The number of sacral vertebrae is five in both adults and foetus 

Ans.2

---------------------------------

 Q8.Select th  activity which would essentially involve movement but not result in locomotion? 

(1) Walking 

(2) Climbing

(3) Talking

(4) Swimming

Ans.3

----------------------------------------

Q9.How many vertebro-chondral ribs are present in the human? 

(1) 7 pairs 

(2) 2 pairs 

(3) 3 pairs

(4) 12 pairs

Ans.3

------------------------------------

Q10.Among the following, limited movement is permitted by joint present at / between  

(1) Adjacent vertebrae 

(2) Junction of carpal and metacarpal of thumb 

(3) Atlanto-occipital joint 

(4) Femur and acetabulum

 Ans.1

-----------------------------

Q76. Guard cells help in: 

(1) Transpiration 

(2) Guttation 

(3) Fighting against infection 

(4) Protection against grazing

Ans.1

------------------------------------- 

Q77. The rupture and fractionation do not usually occur in the water column in vessel/tracheids during the ascent of sap because of 

(1) Transpiration pull 

(2) Lignified thick walls 

(3) Cohesion and adhesion 

(4) Weak gravitational pull

Ans.3

--------------------------------------

Q78. Two cells A and B are contiguous Cell A has osmotic pressure 10 atm, turgor pressure-7atm and diffusion pressure deficit 3 atm. Cell B has osmotic pressure 8 atm, turgor pressure 3 atm and diffusion pressure deficit 5 atm. The result will be 

(1) Movement of water of Cell A to B 

(2) Movement of water from Cell B to A 

(3) No movement of water 

(4) Equilibrium between the two

Ans.1

--------------------------------------

Q79. The translocation of organic solutes in sieve tube members is supported by 

(1) Root pressure and transpiration pull 

(2) P-proteins 

(3) Mass flow involving a carrier and ATP 

(4) Cytoplasmic streaming

Ans.3

---------------------------------------

Q80. Potometer works on the principle of

(1) Amount of water absorbed equals the amount transpired 

(2) Osmotic pressure 

(3) Root pressure 

(4) Potential difference between the tip of the tube and that of the plant

Ans.1

Q136. Although a girdled (upto bast) tree may survive for sometime, but it will eventually die because 

(1) Water will not move upward 

(2) Water will not move downward

(3) Sugars and other organic solutes will not move downward 

(4) Sugars and other organic solutes will not move upward

Ans.3

-------------------------------------

Q137. Phloem loading and unloading process are respectively 

(1) Active, Passive 

(2) Passive, Active 

(3) Active, Active 

(4) Passive, Passive

Ans.3

---------------------------------------

Q138. A. Much of nitrogen in xylem sap is carried in organic form. 

B. In phloem, movement of nutrients is always unidirectional. 

(1) Only A is correct  

(2) Only B is correct 

(3) Both A & B are correct 

(4) Both A & B are incorrect

Ans.1

---------------------------------------

Q139. Requirement of special membrane proteins and highly selective nature are features related to 

(1) Simple diffusion 

(2) Facilitated diffusion 

(3) Active transport 

(4) More than one option is correct

Ans.4

---------------------------------------

Q140. Phenomenon of plasmolysis can be exploited for 

(1) Causing plasmolysis of microbes in highly salted pickles 

(2) Preventing growth of mirobes in jams and jellies 

(3) Elimination of weeds 

(4) All of these

Ans.4

--------------------------------------

Q141. According to potassium pump theory, which activity will not occur for the opening of stomata? 

(1) Dissociation of malic acid 

(2) Passive process of ion exchange 

(3) Transport of H+ ions from guard cells to subsidiary cells 

(4) Increased OP of guard cells by potassium malate

Ans.2

--------------------------------------

Q142. Find odd one w.r.t. chief sink for mineral elements 

(1) Apical and lateral meristem 

(2) Young leaves 

(3) Fruits and seeds 

(4) Mature leaves

Ans.4

--------------------------------------

Q143. Which of the following contributes about 1% of the total transpiration in plants? 

(1) Bark transpiration 

(2) Cuticular transpiration 

(3) Lenticular transpiration 

(4) Stomatal transpiration

Ans.1

--------------------------------------

Q144. Cobalt-Chloride test is for demonstration of 

(1) Imbibition 

(2) Transpiration 

(3) Guttation 

(4) More than one option is correct

Ans.2

--------------------------------------

Q145. Select an incorrect statement 

(1) Guard cells are dumb-bell shaped in Poaceae

(2) Inner wall of the guard cell is thin and elastic in dicots 

(3) Cellulosic microfibrils are arranged radially in guard cells 

(4) Guard cells are bordered by one or more subsidiary

Ans.2

---------------------------------------

Q146. Which of the following substance acts as best imbibant?

(1) Phycocolloids

(2) Protein

(3) Starch

(4) Cellulose

Ans.1

--------------------------------------

Q147. What is/are essential for imbibition to occur?  

(1) Affinity between imbibant and imbibate

(2) Water potential gradient between imbibant and imbibate

(3) Low temperature condition 

(4) More than one option is correct

Ans.4

--------------------------------------

Q148. During process of active absorption of water 

(1) The responsible force develops in roots  

(2) Rate will be higher than passive absorption 

(3) A negative pressure is developed in root xylem 

(4) OP and energy play no role

Ans.1

--------------------------------------

Q149. Select an incorrect statement 

(1) Root pressure has never been observed in conifers 

(2) Root pressure cannot be inhibited by using cyanide, lack of O2 and low temperature 

(3) Root pressure can re-establish the continuous chain of water molecules in the xylem

(4) Develops during early morning and night

----------------------------------------

Q150. According to Dixon and Jolly theory, all given factors contribute to ascent of sap, except 

(1) Cohesive and adhesive force of water 

(2) Vertical water column in xylem fibres and parenchyma 

(3) Continuity of water column 

(4) Transpiration pull

----------------------------------------

 Q121. Which is not a characteristic of imbibition? 

(1) It is a reversible phenomenon 

(2) Heat is generated 

(3) Involves both capillarity and adsorption 

(4) It is a property of hydrophobic and lyophobic colloids

Ans.4

---------------------------------------

Q122. Phenomenon not associated with root pressure is 

(1) Sap exudation 

(2) Bleeding 

(3) Guttation 

(4) Transpiration

Ans.4

---------------------------------------

Q123. Which is not true for root pressure

(1) Positive hydrostatic pressure

(2)  Maximum during the day and minimum during night 

(3) Magnitude is 1-2 bars 

(4) Develops due to metabolic activity of

 roots

Ans.2

---------------------------------------

Q124. Phenomenon of guttation 

(1) is regulated by Cohesion-Tension 

(2) is due to active solute accumulation by phloem 

(3) Takes place to release excessive solutes 

(4) More than one option is correct

Ans.3

--------------------------------------

Q125. Which of the following statement for hydathodes is correct?  

(1) Opens to release excessive pure water from 

(2) Contains a loosely arranged parenchyma called epithem 

(3) These are found at the tips of the veins in leaves 

(4) More than one option is correct

Ans.4

-------------------------------------

Q126. A- Most researchers agree that water is mainly 'pulled upward through the plant, where transpiration is the driving force. 

B- Less than one percent of water reaching the leaves is used in plant growth and photosynthesis 

C- Cobalt chloride paper turns blue on absorbing water 

(1) All are correct 

(2) Only C is incorrect 

(3) Only B is incorrect 

(4) Only A is correct

Ans.2

-------------------------------------

Q127. In a stomatal apparatus, cellulosic microfibrils are oriented 

(1) Longitudinally on subsidiary cells 

(2) Radially in the cell walls of guard cells 

(3) Radially and longitudinally in wall of guard cells 

(4) Longitudinally on both guard cells 

Ans.2

-------------------------------------

Q128. According to potassium pump theory of Levitt 

(1) Starch is incompletely oxidized to PEP during night 

(2) Malic acid dissociates into malate ion and protons in the subsidiary cells 

(3) Movement of H+ ions from guard cell to subsidiary cell is active 

(4) Potassium malate decrease the OP of guard cells during day

Ans.3

------------------------------------

Q129. A - in dry atmosphere, the relative humidity is low, so the rate of transpiration increases 

B - Slow breeze promotes the rate of transpiration 

C - ABA promotes transpiration 

D - High salt concentration in soil water increases transpiration

(1) C and D are correct 

(2) B and C are correct 

(3) A and C are correct 

(4) A and B are correct

Ans.4

-------------------------------------

Q130. The conditions under which transpiration would be most rapid are 

(1) Excess of water in soil only 

(2) Low humidity, high temperature, turgid guard cells and moist soil 

(3) Low velocity of wind only 

(4) High humidity

Ans.2

-------------------------------------

Q131. During stomatal opening (photoactive) which does not occur? 

(1) Increase in pH of guard cells 

(2) Hydrolysis of starch in guard cells 

(3) Increased TP of subsidiary cells 

(4) Dissociation of malic acid in guard cell

Ans.3

-------------------------------------

Q132. Incorrect statement in relation to stomatal apparatus is 

(1) Cellulose microfibrils are arranged longitudinally to axis of stomata 

(2) Subsidiary cells are located as modified epidermal cells 

(3) Guard cells may be ellipsoidal in monocots 

(4) Inner walls of guard cells are thick and elastic 

Ans.1

--------------------------------------

Q133. Select Incorrect statement w.r.t. translocation of mineral ions. 

(1) The chief sinks for the mineral elements are the apical and lateral meristems. 

(2) Most readily mobilised elements are N, P. K. 

(3) Most of the nitrogen travels as inorganic ions through xylem. 

(4) Small amount of P and S are carried as organic compounds through xylem.

Ans.3

--------------------------------------

Q134. A - Transport of water and minerals in Xylem, is --- A --- 

B - Transport of organic and mineral nutrients is --- B--- 

(1) A- Unidirectional, B- Unidirectional 

(2) A-Multidirectional, B-Multidirectional 

(3) A-Multidirectional, B- Unidirectional 

(4) A-Unidirectional, B- Multidirectional

Ans.4

-------------------------------------

Q135. According to the pressure flow hypothesis 

A. Phloem loading produces a hypertonic condition in the sieve tubes. 

B. Water potential gradient facilitates the mass movement in the phloem. 

C. Phloem unloading is a passive process.

(1) A & B are incorrect 

(2) B & C are incorrect 

(3) A & B are correct 

(4) A & C are correct

Ans.3

--------------------------------------

Q106. Phloem helps in translocation of 

(1) Hormones 

(2) Reducing sugars 

(3) Only sucrose 

(4) Only amides

Ans.1

--------------------------------------

Q107. Substances soluble in lipids diffuse ------- through the membrane  

(1) By active transport 

(2) Faster 

(3) By facilitated transport 

(4) Slower

Ans.2

--------------------------------------

 Q108. Which of the following is a plant factor which affects transpiration? 

(1) Light 

(2) Relative humidity 

(3) Available soil water 

(4) Root shoot ratio

Ans.4

-------------------------------------

Q109. Active transport as well as facilitated diffusion both 

(1) Require ATP (energy) 

(2) Are highly selective 

(3) Show downhill movement of ions 

(4) Show uphill movement of ions

Ans.2

-------------------------------------

Q110. Minerals are unloaded at fine vein ending then they are picked up by cells through 

(1) Passive antiport 

(2) Simple diffusion 

(3) Passive symport 

(4) Active transport 

Ans.4

--------------------------------------

Q111. Xylem helps in translocation of 

(1) Amides 

(2) Some hormones 

(3) Water and minerals 

(4) More than one option is correct

Ans.4

--------------------------------------

Q112. Consider the following statements and select the right choice. 

(a) A simple experiment, called girdling was used to identify the tissues through which food is transported 

(b) More than five percent of water reaching the leaves is used in photosynthesis and plant growth. 

(c) Facilitated diffusion is specific 

(d) Diffusion is not dependent on a living system 

(1) Only (a) is correct 

(2) (a), (b) & (c) are correct 

(3) Only (b) is incorrect 

(4) All are correct

Ans.3

--------------------------------------

Q113. A cell is placed in 0.6 M solution of sugar and no change in volume of cell is found What is the concentration of the cell sap? 

(1) 60 M                (2) 6 M 

(3) 0.6 M               (4) 0.40 M

Ans.3

--------------------------------------

Q114. Transpiration and root pressure cause water to rise in plants by (respectively) 

(1) Pulling it upward 

(2) Pushing and pulling 

(3) Pushing it upward 

(4) Pulling and pushing

Ans.4

---------------------------------------

Q115. Facilitated diffusion is characterized by all, except 

(1) Requirement of membrane proteins 

(2) Uphill transport 

(3) No requirement of energy 

(4) Highly selective nature

Ans.2

--------------------------------------

Q116. Which is not true regarding active water absorption? 

(1) Require energy 

(2) Occurs only when transpiration is slow

(3) Living cells are essential 

(4) Force develops in shoot

Ans.4

---------------------------------------

Q117. Water channels are 

(1) Made up of eight similar types of aquaporins 

(2) Involved in active transport 

(3) Involved in facilitated diffusion 

(4) More than one option is correct

Ans.3

--------------------------------------

Q118. A perfect partition between osmotically active system and pure water in physical conditions can be formed by a 

(1) Semipermeable membrane 

(2) Selective permeable membrane 

(3) Impermeable membrane 

(4) Freely permeable membrane

Ans.1

--------------------------------------

Q119. When a cell is fully turgid, which of the following will be zero? 

(1) Osmotic pressure 

(2) Turgor pressure 

(3) Wall pressure 

(4) Suction pressure

Ans.4

---------------------------------------

Q120. Which is a correct order (w.r.t. imbibing capacity in decreasing order)? 

(1) Agar-agar > Pectin > Proteins > Starch Cellulose 

(2) Agar-agar > Protein > Pectin > Cellulose > Starch 

(3) Proteins > Agar-agar > Pectin > Starch > Cellulose 

(4) Agar-agar > Starch > Protein > Cellulose > Pectin

Ans.1

Q91. Potometer works on the principle of 

(1) Osmotic pressure 

(2) Amount of water absorbed equals the amount transpired 

(3) Root pressure 

(4) Potential difference between the tip of the tube and that of the plant

Ans.2

------------------------------------

Q92. Which of the following get accumulated in the vacuoles of guard cells during stomatal opening? 

(1) Water, calcium and magnesium 

(2) Starch, potassium and chloride ions 

(3) Malate, sodium and potassium ions 

(4) Malate, potassium and chloride lons

Ans.4

------------------------------------

Q93. The movement of water, from one cell of cortex to adjacent one in roots, is due to

(1) Accumulation of inorganic salts in the cells 

(2) Accumulation of organic compounds in the cells 

(3) Water potential gradient 

(4) Matrix potential gradient

Ans.3

-------------------------------------

Q94. Which of the following is the most accepted theory for movement of water through plants? 

(1) Cohesion tension theory 

(2) Capillarity 

(3) Imbibition theory 

(4) Root pressure

Ans.1

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Q95. The translocation of organic solutes in sieve tube members is supported by 

(1) Cytoplasmic streaming 

(2) Root pressure and transpiration pull 

(3) P-proteins 

(4) Mass flow involving a carrier and ATP

Ans.4

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Q96. Loading of phloem is related to 

(1) Increase of sugar in phloem 

(2) Elongation of phloem cell 

(3) Separation of phloem parenchyma 

(4) Strengthening of phloem fiber

Ans.1

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Q97. Bidirectional translocation of solutes takes place in 

(1) Parenchyma 

(2) Cambium 

(3) Xylem 

(4) Phloem

Ans.4

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Q98. Water potential is 

A. Mainly determined by solute potential and pressure potential 

B. Taken to be zero for pure water at standard temperature which is not under any pressure 

(1) Only B is correct 

(2) Both A and B are correct 

(3) Both A and B are incorrect 

(4) Only A is correct

Ans.2

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Q99. Wooden doors and windows swell up and stuck in rainy season, it is due to 

(1) Endosmosis 

(2) Plasmolysis 

(3) Deplasmolysis 

(4) Imbibition

Ans.4

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Q100. The movement of water through the system of interconnected protoplasts also involve  

(1) Mass flow 

(2) Intercellular spaces only 

(3) Cytoplasmic streaming 

(4) Walls of the cells

Ans.3

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Q101. Loss of water in liquid phase from leaf tips of herbaceous plants is --A-- It occurs due to --B-- 

(1) A Guttation B-Transpiration pull 

(2) A-Transpiration B-Transpiration pull 

(3) A-Guttation B-Root pressure 

(4) A-Transpiration B-Root pressure

Ans.3

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Q102. Immediate cause of the opening or closing of the stomata is 

(1) Change in the turgidity of the guard cells

(2) Low light intensity 

(3) High humidity in atmosphere 

(4) Longitudinal orientation of cellulose microfibrils in guard cells

Ans.1

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Q103. All are the chief sinks of mineral elements, except 

(1) Apical meristem 

(2) Storage organ 

(3) Young leaves 

(4) Senescent organs

Ans.4

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Q104. Which of the following is the correct sequence of events involved in phloem transport? 

(1) Source [loading] - Sieve tubes - Companion cells - Sink [unloading] 

(2) Source [unloading] - Companion cells -  Sieve tubes - Sink [loading] 

(3) Source [loading] - Companion cells -  Sieve tubes - Sink [unloading] 

(4) Sink [loading] - Companion cells - Sieve tubes - Source [unloading]

Ans.3

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Q105. Which of the following requires energy? 

(1) Imbibition 

(2) Facilitated diffusion 

(3) Loading of food in phloem 

(4) Simple Diffusion

Ans.3