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Question Bank No: 2

1. Maximum amount of energy/ATP is liberated on oxidation of

a)		Fats
b)		Proteins
c)		Starch
d)		Vitamins

2. In germinating Castor seeds,R.Q.is

a)		Less than one
b)		More than one
c)		One
d)		Zero

3. Common phase between aerobic and anaerobic modes of respiration is

a)		Krebs cycle
b)		EMP/glycolysis
c)		Oxidative phosphorylation
d)		PPP

4. Link between glycolysis, Krebs cycle and $β -$ oxidation of fatty acid or carbohydrate and fat metabolism is

a)		Oxaloacetic acid
b)		FatSuccinic acid
c)		Citric acid
d)		Acetyl CoA

5. R.Q.is less than one when the respiratory substrate is

a)		Sucrose
b)		Fat
c)		Glucose
d)		Organic acid

6. Final electron acceptor in respiration is

a)		Hydrogen
b)		Oxygen
c)		Cytochromes
d)		Dehydrogenases

7. In the process of respiration in plants 180g of glucose plus 192 g of oxygen produce

a)		132g of ${CO}_{2},$ 54g of water and 343 Cal. of energy
b)		264g of ${CO}_{2},$ 108g of water and 686 Cal. of energy
c)		528g of ${CO}_{2},$ 216 of water and 1372 Cal. of energy
d)		Large amount of ${CO}_{2}$ ,no water and no energy

8. Incomplete breakdown of sugars in anaerobic respiration forms

a)		Fructose and water
b)		Glucose and ${CO}_{2}$
c)		Alcohol and ${CO}_{2}$
d)		Water and ${CO}_{2}$

9. Which among the following is the most appropriate reason for storing green coloured apples at low temperature?

a)		The rate of photosynthesis is reduced
b)		Respiration and photosynthesis are completely inhibited
c)		The rate of respiration is reduced
d)		The rates of photosynthesis and respiration are reduced

10. Net gain of ATP in glycolysis

a)		6
b)		2
c)		4
d)		8

11. Common immediate source of energy in cellular activity is

a)		DNA
b)		ATP
c)		RNA
d)		NAD

12. Krebs cycle starts with the formation of six carbon compound by rreaction between

a)		Malic and acetyl CoA
b)		Succinic acid and pyruvic acid
c)		Fumaric acid and pyruvic acid
d)		Oxalo-acetic acid and acetyl CoA

13. Incomplete oxidation of glucose into pyruvic acid with several intermediate steps is known as

a)		TCA-pathway
b)		Glycolysis
c)		HMS-pathway
d)		Krebs cycle

14. Krebs cycle takes place in

a)		Vesicles of E.R.
b)		Mitochondria
c)		Dictyosomes
d)		Chloroplasts

15. Blackman's law was conceived in connection with

a)		Photosynthesis
b)		Respiration
c)		Transpiration
d)		Root pressure

16. Chemical which absorbs light energy and changes it to chemical energy is

a)		Xanthophyll
b)		Chlorophyll a
c)		Chlorophyll b
d)		Chlorophyll c

17. Cycle photophosphorylation products

a)		NADPH
b)		ATP and NADPH
c)		ATP,NADPH and $O_{2}$
d)		ATP only

18. Maize,Sugarcane and some other tropical plants have high efficiency of ${CO}_{2}$ fixation because they operate

a)		Calvin cycle
b)		Hatch-Slack cycle
c)		TCA cycle
d)		PP pathway

19. Rate of photosynthesis is independent of

a)		Intensity of light
b)		Duration of light
c)		Quality of light
d)		Temperature

20. Which one of the following would no be limiting factor in photosynthesis?

a)		$O_{2}$
b)		${CO}_{2}$
c)		Chlorophyll
d)		Light

21. The $C_{4}$ -plants are different from the $C_{3}$ -plants with reference to the

a)		The substance that accepts ${CO}_{2}$ in carbon assimilation
b)		Types of end product of photosynthesis
c)		The number of NADPH that are consumed in preparing sugar
d)		Types of pigments involved in photosynthesis

22. During photosynthesis the oxygen in glucose comes from

a)		$H_{2} O$
b)		${CO}_{2}$
c)		Both from $H_{2} O$ and ${CO}_{2}$
d)		Oxygen in air

23. The two pigment system theory of photosynthesis was proposed by

a)		Hill
b)		Blackman
c)		Emerson
d)		Arnon

24. The number of chlorophyll molecules in a quantasome is

a)		50-100
b)		200-250
c)		300-400
d)		500-600

25. Which one of the following pigments does not occur in chloroplast

a)		Chlorophyll
b)		Carotene
c)		Anthocyanin
d)		Xanthophyll

26. Water soluble pigment is

a)		Chlorophyll
b)		Carotenc
c)		Anthocyanin
d)		Xanthophyll

27. Besides water and light which is more essential as a raw material for food formation

a)		${CO}_{2}$
b)		NAD
c)		$O_{2}$
d)		Mineral salts

28. Photophosphorylqtion is the process which

a)		${CO}_{2}$ and $O_{2}$ unite
b)		Phosphoglyceric acid is produced
c)		Aspartic acid is formed
d)		Light energy is converted into chemical energy through production of ATP

29. Our present day view regards photosynthesis is that it

a)		Converts light energy into chemical energy
b)		Creates useful energy
c)		Fixes ${CO}_{2}$ into carbohydrates
d)		Reverses the action of respiration

30. The first scientist to find out the role of light in photosynthesis was

a)		Ingenhousz
b)		Senebier
c)		Priestley
d)		Sachs

31. According to the vital force theory,ascent of sap is due to active pulsation of innermost layer of cortex.This theory was given by

a)		J.C.Bose
b)		Dixon
c)		Strasburger
d)		Sachs

32. Water rises in the stem due to

a)		Cohesion and transpiration pull
b)		Turgor pressure
c)		Osmotic pressure
d)		None of the above

33. Root pressure is maximum at the time of

a)		Water absorption as well as transpiration are law
b)		Both water absorption and transpiration are high
c)		Absorption is low and transpiration is high
d)		Absorption is high and transpiration is low

34. The phenomenon of uptake of water at the expense of energy by the cell usually against the osmotic gradient is known as

a)		Osmosis
b)		Active absorption
c)		Passive absorption
d)		Imbibition

35. Root hairs occur in the zone of

a)		Cell division
b)		Cell elengation
c)		Cell maturation
d)		Mature cells

36. Water will be absorbed by root hairs when the external medium is

a)		Hypotonic
b)		Hypertonic
c)		Isotonic
d)		Viscous

37. Which one gives the most valid explanation for guard cell movements

a)		Guard cell photosynthesis
b)		Starch hydrolysis theory
c)		Potassium influx and efflux
d)		Transpiration

38. Which wall of the guard cells is thick

a)		Lateral
b)		Inner
c)		Outer
d)		All the above

39. Transpiration is least in

a)		Good soil moisture
b)		High wind velocity
c)		Dry environment
d)		High atmospheric humidity

40. The following percentage of water absorbed by herbaccous plants is lodt in transpiration

a)		80
b)		60
c)		99
d)		40

41. Water drops present on leaf margins of Tropaeolum, Balsam and grasses in early morning are due to

a)		Guttation
b)		Dew
c)		Osmosis
d)		Transpiration

42. Wilting in plants occurs when

a)		Pholem is blocked
b)		Xylem is removed/blocked
c)		Pith is removed
d)		A few leaves are removed

43. Active K+ exchange mechanism for opening and closing of stomata was given by

a)		Darwin
b)		Levit
c)		Scarth
d)		Khorana

44. When beet root cylinders are washed and then placed in cold water,anthocyanin does not come out.This indicates that most likely the plasma membrane is

a)		Permiable to anthocyanin
b)		Impermeable to anthocyanin
c)		Differentially permeable to anthocyanin
d)		Dead structure

45. A cell placed in strong salt solution will shrink because

a)		Cytoplasm will decompose
b)		Mineral salts will be break the cell wall
c)		Salt water enters the cell
d)		Water comes out by exosmosis

46. Plasma membrane controls

a)		Passage of water only
b)		Passage of water and some solutes in and out of the cell
c)		Passage of water and solutes into the cell
d)		Movement of cell contents out of the cell

47. Root hairs absorb water from soil when

a)		Osmotic concentration is same in the two
b)		Solute concentration is higher in soil solution
c)		Solute concentration is higher in root hairs
d)		Absorption is active

48. A cell is plassmolysed after being kept in hypertonic solution,Wht will be present between cell wall and plasmalemma?

a)		Isotonic solution
b)		Hypertonic solution
c)		Air
d)		Hypotonic solution

49. The force which determines the flow of water from one cell to another is

a)		T.P
b)		D.P.D
c)		O.P
d)		W.P

50. Electron transport system of mitochondria is located in

a)		Outer membrane
b)		Inner membrane
c)		Inter-cristel space
d)		Outer chamber