Questions and Answers on Biology

1. The organelle which converts the solar energy into chemical energy is .........
A) Mitochondria
B) Lysosome
C) Chloroplast
D) Ribosome
Answer :   C

2. The semi-autonomous cell organelle which is present in both plant cell and animal cell is ......
A) Chloroplast
B) Mitochondria
C) Ribosome
D) Both A & B
Answer :   B

3. An old cell is characterised by?
A) Absence of vacuole
B) Absence of incorrect
C) Presence of small vacuole
D) Presence of large vacuole
Answer :   D

4. Which one of the following is incorrect match?
A) Nucleus - Cell brain
B) Peroxisome - Suicidal bag of cell
C) Ribosomes - Protein factories
D) Mitochondria - Power house
Answer :   B

5. Which of the following is not considered as a part of the endomembrane system?
A) Lysosome
B) Golgi complex
C) Chloroplast
D) Endoplasmic reticulum
Answer :   C

6. Amembranous cell organelles which are found in both Prokaryotic and Eukaryotic cells are?
A) Mitochondria
B) Vacuoles
C) Ribosome
D) Both A & B
Answer :   C

7. Which of the following cytoplasmic organelles has DNA?
A) Lysosome
B) Golgi complex
C) Chloroplast
D) Chloroplast and Mitochondria
Answer :   D

8. The sedimentation constant of a ribosome is 70 S. It breaks up into two subunits whose sedimentation constants are ......
A) 40 S and 30 S
B) 50 S and 20 S
C) 60 S and 20 S
D) 50 S and 30 S
Answer :   D

9. Nucleus was discovered by ....
A) Porter
B) Robert Brown
C) Rhodin
D) Robert Hook
Answer :   B

10. Which of the following organelle is absent in bacteria?
A) Ribosome
B) Plasmid
C) Mitochondria
D) All of these
Answer :   C

11. End product of glycolysis is .....
A) Glyceraldehyde-3-phosphate
B) Pyruvic acid
C) Acetyl - coA
D) Glucose
Answer :   B

12. The site of glycolysis is ....
A) Cristae
B) Matrix
C) Oxysome
D) Cytoplasm
Answer :   D

13. Krebs cycle takes place in ....
A) Cytoplasm
B) Matrix
C) Cristae
D) Golgi complex
Answer :   B

14. Which of the following is known connecting link between glycolysiskrebs cycle?
A) Pyruvic acid
B) Citric acid
C) Acetyl - coA
D) Oxaloacetic acid
Answer :   C

15. Number of oxidation reactions take during TCA cycle?
A) 3
B) 4
C) 1
D) 1
Answer :   B

16. Identify the enzyme which is not involved in glycolysis?
A) Phosphoglycerate Kinase
B) Phosphofructo kinase
C) Fumarase
D) All of these
Answer :   C

17. Which of the following is an amphibolic pathway?
A) TCA cycle
B) Calvin cycle
C) ETC
D) Terminal oxidation
Answer :   A

19. Number of ATP molecules produced by each NADPH is?
A) 3
B) 2
C) 1
D) 5
Answer :     A

20. What is the correct order of the stage of cellular respiration?
A) Kreb's cycle + ETC + Glycolysis
B) ETC + Kreb's cycle +Glycolysis
C) Glycolysis + Kreb's cycle  + ETC
D) Glycolysis + ETC  +  Kreb's cycle
Answer :     C

21. Number of ATP molecules produced by each FADH?
A) 3
B) 2
C) 1
D) 5
Answer :     B

22. Electron transport chain(ETC) reactions take place in ........
A) Cytoplasm
B) Matrix
C) Cristae
D) Golgi complex
Answer :     C

23. A single cycle of TCA yields ...
A) 2 FADH2 + 2 NADH2 + 2 ATP
B) 1 FADH2 + 2 NADH2 + 1 ATP
C) 1 FADH2 + 3 NADH2 + 1 ATP
D) 1 FADH2 + 1 NADH2 + 1 ATP
Answer :     C

24. How many oxidative decarboxylation reactions occur in TCA cycle?
A) 3
B) 2
C) 1
D) 4
Answer :     C

25. Citric acid cycle was discovered by?
A) Lipman
B) Hans Krebs
C) Melvin Calvin
D) Robert Hill
Answer :     B

26. Enzyme involved in the first of Krebs cycle ...
A) Citric thiokinase
B) Citric dehydrogenase
C) Citric decarboxylase
D) Citric synthase
Answer :     D

27. Which of the following is known as stress phyto hormone?
A) Abscisic acid
B) Ethylene
C) Auxin
D) Cytokinin
Answer :     A

28. All are synthetic auxins except ......
A) NAA
B) IAA
C) 2, 4 - D
D) 2, 4, 5 - T
Answer :     B

29. Nodule formation is induced by?
A) IBA
B) IAA
C) NAA
D) Both A & B
Answer :     B

30. Which of the following amino acid is required for the synthesis of auxin?
A) Tryptophan
B) Phenylalanine
C) Lysine
D) Cystine
Answer :     A

31. Avena curvature test is associated with?
A) Auxin
B) Cytokinin
C) Abscisic acid
D) Gibberellin
Answer :     A

32. Coconut milk factor is .......
A) auxin
B) Gibberellin acid
C) Abscisic acid
D) Cytokinin
Answer :     D

33. Which of the following is not a C4 plane?
A) Sorghum
B) Rice
C) Sugar cane
D) Maize
Answer :     B

34. Most abundant plant protein in the world?
A) PEP case
B) Carbonic anhydrase
C) RuBisCo
D) Amylase
Answer :     C

35. Ribulose 1, 5 bisphosphate is .....
A) 4 carbon aldose sugar
B) 3 carbon aldose sugar
C) 6 carbon ketose sugar
D) 5 carbon ketose sugar
Answer :     D

36. Bicollateral vascular bundle is a characteristic feature of ......
A) Cucurbitaceae
B) Solanaceae
C) Cruciferae
D) Malvaceae
Answer :     A

37. The age of tree by counting annual rings is called .....
A) Dendrology
B) Chronology
C) Gerentology
D) Dendrochronology
Answer :     D

38. Which of the following is not a part of stele?
A) Pericycle
B) Pith
C) Xylem
D) Endodermis
Answer :     D

39. The outer most layer of bark is ......
A) Phelloderm
B) Phellogen
C) Phellem
D) Pith
Answer :     C

40. Inner most layer of periderm is .....
A) Phelloderm
B) Phellogen
C) Phellem
D) Pith
Answer :     A

41. R.Q. value of succulent plant is?
A) 1
B) 0
C) less than one
D) 2
Answer :     B

42. Seed dormancy is caused by .......
A) Auxim
B) Abscisic acid
C) Cytokinin
D) Gibberellin
Answer :     B

43. The principle involved in guttation is .....
A) Transpiration
B) Root pressure
C) Imbibition
D) Osmosis
Answer :     B

44. Phosphoenolpyruvate (PEP) is the primary CO2 acceptor in .....
A) C3 plants
B) C4 plants
C) C3 and C4 plants
D) C2 plants
Answer :     B

45. The water potential of pure water is .....
A) 0
B) 1
C) more than 1
D) less than '0'
Answer :     A

46. In dicot root generally xylem is .....
A) Exarch and polyarch
B) Exarch and tetrach
C) Exarch and triarch
D) Exarch and diarch
Answer :     B

47. Casparian strips are present in cells of which of the following?
A) Epidermis
B) Hypodermis
C) Endodermis
D) Pericycle
Answer :     C

48. Polyarch condition is found in .......
A) Monocot root
B) Dicot root
C) Monocot stem
D) Dicot stem
Answer :     A

50. Light reactions of photo synthesis occur in which part of chloroplast? 
A) Matrix
B) Grana
C) Stroma
D) All
Answer :     B