Biology

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


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


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

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


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


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


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


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


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


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


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


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


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


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


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


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


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

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


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


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


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


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


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


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


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


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


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


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


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


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


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


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


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


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


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


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


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

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


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


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


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


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


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


45. The water potential of pure water is …..
A) 0
B) 1
C) more than 1
D) less than ‘0’
 Answer


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


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


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

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

Questions and Answers on Biology

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