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Question Bank No: 1

1. Florigen is a flowering hormone produced on

a)		Flower buds
b)		leaves
c)		flower primordia
d)		stem apex

2. Which of the following simulates seed germination

a)		Far-red light
b)		Blue light
c)		Red light
d)		Light Darkness

3. The hormone which is known as antigibberllin is

a)		Auxin
b)		Ethylene
c)		Abscisic acid
d)		Cytokinin

4. Most suitable temperature for vernalizing the plants is

a)		1 to $6^{0} c$
b)		0 to ${- 4}^{0} c$
c)		12 - $14^{0} c$
d)		- $6^{0} c$

5. The low temperature requirement in plants can be replaced by a phytohormone to induce early flowering.The hormone is

a)		Auxin
b)		Ethylene
c)		Cytokinin
d)		Gibberellin

6. Which of the following parts of the spectrum is absorbed by the pigment Phytochrome?

a)		Red
b)		Farred
c)		Blue
d)		Green

7. Light period is critical in

a)		Short day plants
b)		Long day plants
c)		Both Short day and long day plants
d)		Day neutral plants

8. The continuous dark period required for short day plants is

a)		8-10 hrs
b)		14-16 hrs
c)		24 hrs
d)		5-24 hrs

9. First step in the absorption of mineral satts is

a)		Imbibition
b)		Diffusion
c)		Osmosis
d)		Ion-exchange

10. The pressure developed inside a cell as a result of the entry of water into the cell sap is known as

a)		Diffusion pressure
b)		Osmotic Pressure
c)		Turgor Pressure
d)		Wall Pressure

11. A plant cell 'A' has an OP of 40 atm and a T.P at 15 atm.And the plant cell 'B' has an O.P. of 45 atm and a.t.p. at 25 atm. Water will

a)		move from A to B
b)		move from B to A
c)		Not move
d)		None of the above

12. Transpiration pull theory was proposed by

a)		Dixon and Jolly
b)		Jullius Sachs
c)		Godrewski
d)		Strasburger

13. ${}^{45}{Ca}$ is a

a)		Major element
b)		Trace element
c)		Tracer element
d)		Micro element

14. 1 gm of starch is added to one litre of sugar solution.Its osmotic pressure will

a)		Increase
b)		Decrease
c)		First increase and then decrease
d)		Remains the same

15. Osmotic pressure of a solution is always

a)		Higher than its pure solvent
b)		Lower than its pure solvent
c)		Equal to that of its pure solvent
d)		None of the above

16. Which of the forms of water in the soil is available to plant roots?

a)		Hygroscopic water
b)		Capillary water
c)		Chemically combined water
d)		Gravitational water

17. Reduction of $N_{2}$ to two molecules of ${NH}_{3}$ by nitrogen fixing organisms is coupled with the production of

a)		1 $H_{2}$ molecule
b)		2 $H_{2}$ molecule
c)		1 $O_{2}$ molecule
d)		1 ${CO}_{2}$ molecule

18. What percentage of the total nitrogen fixation is contributed by lighting?

a)		90 $\frac{0}{0}$
b)		50 $\frac{0}{0}$
c)		8 $\frac{0}{0}$
d)		25 $\frac{0}{0}$

19. Of the plants given below, which shows higher rate of nitrogen fixation?

a)		Soybeans
b)		Peas
c)		Beans
d)		Alfalfa

20. The host plant genes responsible for nodule formation in leguminous plants are

a)		Nod genes
b)		Vir genes
c)		nit genes
d)		All the above

21. The pigment leg-haemoglobin occurs in which part of the infected nodule cells

a)		Cytosol
b)		Vacuole
c)		Mitochondria
d)		Ribosomes

22. Which of the following human activity /activities affect the natural nitrogen cycle?

a)		Burning of fossil fuels
b)		Exhausts of motorbiles
c)		Manuring of fields by chemical fertilizers
d)		All the above

23. Reduction of one molecule of nitrogen into 2 molecules of ammonia consumes

a)		4 molecules of ATP
b)		8 molecules of ATP
c)		16 molecules of ATP
d)		2 molecules of ATP

24. Ammonia is oxidised to nitrite by

a)		Nitrobacter
b)		Nitrosomonas
c)		Bacillus dentrificans
d)		Azotobacter

25. Which condition increases the photosynthetic rate?

a)		High concentration of atmospheric ${CO}_{2}$
b)		High content of water in leaf mesophyll
c)		High temperature about $50^{0} c$
d)		Temperature below $45^{0} c$

26. Which of the following pigment shows the highest Retention value(Rf) ?

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

27. The empirical formula of chlorophyll-a is

a)		$C_{55} H_{70} O_{5} N_{4}$ $M_{g}$
b)		$C_{50} H_{72} O_{5} N_{4}$ $M_{g}$
c)		$C_{55} H_{70} O_{6} N_{4}$ $M_{g}$
d)		$C_{55} H_{72} O_{5} N_{4}$ $M_{g}$

28. Chlorophyll molecules absorb only-lights in the visible spectrum

a)		Green and Yellow
b)		Orange and Violet
c)		Indigo and Green
d)		Blue and Red

29. In eukaryotes RUBISCO is abundantly found in

a)		Chloroplast membrane
b)		Chloroplast Stroma
c)		Lumen of thylakoids
d)		None of the above

30. Crassulacean Acid Metabolism (CAM) was first observed in

a)		Bryophyllum Calycium
b)		Opurtia dilleni
c)		Crassula sp.
d)		Kalanchoe sp.

31. In $C_{4}$ plants primary ${CO}_{2}$ fixation occurs in chloroplasts of

a)		Bundle Sheath Cells
b)		Palisade tissue
c)		Spongy mesophyll
d)		Guard Cells

32. The radioactive isotope of cartoon used by Melvin Calvin in autoradiographic experiment on dark reaction was

a)		${}^{16}C$
b)		${}^{14}C$
c)		${}^{18}C$
d)		${}^{12}C$

33. The instantaneous source of energy is

a)		Aminoacid
b)		Glucose
c)		Protein
d)		Fat

34. The connecting link between glycolyisis and Kreb's cycle is

a)		Pyruvic acid
b)		Accetyl Co A
c)		Acetaldehyde
d)		Citric acid

35. Which of the following theory best explains the mechanism of Phosphorylation?

a)		Chemi-coupling hypothesis
b)		Conformational hypothesis
c)		Chemi-osmotic theory
d)		Lock and Key theory

36. Respiratory enzymes in bacteria are located in/on

a)		Cytosol
b)		Mitochondria
c)		Ribosomes
d)		Cell membranes

37. In which component of mitochoridria is ATP synthesized?

a)		Cristae
b)		Matrix
c)		Oxysome
d)		Outer membrane

38. The whole process of aerobic respiration takes place in the

a)		Mitochondria
b)		Mitochondria and Peroxisomes
c)		Mitochondria and Cytosol
d)		Cytosol

39. The common phase between aerobic and anserobic respiration is called

a)		TCA cycle
b)		Oxidative phosphorylation
c)		EMP Pathway
d)		Link reaction

40. Alcoholic fermentation is carried out by

a)		All fungi
b)		All bacteria
c)		Some fungi and some bacteria
d)		All microorganisms

41. General formula for aerobic respiration is

a)		${6 CO}_{2} {+ 6 H}_{2} O \to C_{6} H_{12} O_{6} + {6 O}_{2}$
b)		$C_{6} H_{12} O_{6} + {6 O}_{2} \to {6 CO}_{2} {+ 6 H}_{2} O + 686 kcal$
c)		$C_{6} H_{12} O_{6} \to {2 C}_{2} H_{5} OH + {2 CO}_{2} + 2 ATP$
d)		$C_{6} H_{12} O_{6} \to {2 C}_{3} H_{6} O_{3} + 2 ATP$

42. Lactic acid fermentation does not produce

a)		ATP
b)		${CO}_{2}$ and NADH
c)		${CO}_{2}$
d)		NADH

43. Oxidation of pyruvate to ${CO}_{2}$ and $H_{2} O$ occurs through

a)		Citric acid cycle
b)		Tricarboxylic acid
c)		Krebs cycle
d)		All the above

44. Which one is a product of glycolysis,besides 2ATP?

a)		FAD
b)		NADH
c)		NAD
d)		NADP

45. Oxidative phosphorylation occurs during

a)		Transpiration
b)		Respiration
c)		Protein synthesis
d)		Nitrogen metabolism

46. Glycolysis is

a)		$C_{6} H_{12} O_{6} + {6 O}_{2} \to {6 CO}_{2} + {6 H}_{2} O$
b)		$C_{6} H_{12} O_{6} \to {2 C}_{2} H_{5} OH + {2 C O}_{2}$
c)		$C_{6} H_{12} O_{6} \to {2 C}_{3} H_{4} O_{3} + 4 H$
d)		$C_{3} H_{4} O_{3} + NADH \to C_{2} H_{5} OH + {C O}_{2} + {NAD}^{+}$

47. Glycolysis is part of

a)		Only anaerobic respiration
b)		Krebs cycle
c)		Only aerobic respiration
d)		Both aerobic and anaerobic respiration

48. When one glucose molecules is completely oxidised,it changes

a)		36 ADP molecules into 36 ATP molecules
b)		38 ADP molecules into 38 ATP molecules
c)		30 ADP molecules into 30 ATP molecules
d)		32 ADP molecules into 32 ATP molecules

49. In succlents, respiratory quotient is less than one due to

a)		Incomplete oxidation
b)		Incomplete reduction
c)		Complete reduction
d)		Complete oxidation

50. Which of the following is formed from phosphorylation?

a)		Fructose 1,6-biphosphate
b)		Phosphoglyceric acid
c)		PEP
d)		Pyruvic acid