Question Bank No: 1

1. Shape of chromosome can be best observed during

 a)Prophase
 b)Metaphase
 c)Anaphase
 d)Telophase

2. Meiosis can be studied in angiosperms in

 a)Dividing pollen mother cells in anther
 b)Dividing cells of vascular cambium
 c)Shoot apical meristem
 d)Root apical meristem

3. Segregation of mendelian factors (Aa) occurs during

 a)Diplotenc
 b)Anaphase 1
 c)Zygotene/Pachytene
 d)Anaphase 11

4. The term meiosis was coined by

 a)Farmer and moore
 b)Flemming
 c)Blackman
 d)Robertson

5. Spindle fibres are formed of

 a)Tubulin
 b)Fibrin
 c)Flagellin
 d)Actin

6. Nicotinamide can be synthesised in human body from

 a)Fructose
 b)Lactose
 c)Tyrosine
 d)Tryptophan

7. Unsaturated fatty acids have

 a)Oleic acid
 b)High melting point
 c)One or more double bonds
 d)Palmitic acid

8. Enzyme hexokinase is inhibited by excess glucose 6-P.It is

 a)Competative inhibition
 b)Feed-back allosteric inhibition
 c)Noncompetitive inhibition
 d)Positive feed-back

9. Enzymes are polymers of

 a)Fatty acids
 b)Amino acids
 c)Hexose sugar
 d)Inorganic phosphate

10. Nitrogen is an important component of

 a)Lipids
 b)Carbohydrates
 c)Polyphosphates
 d)Proteins

11. A nucleoside differs from nucleotide in not having

 a)Sugar
 b)Nitrogen base
 c)Phosphate
 d)Phosphate and Sugar

12. A nucleotide is

 a)Sugar + Phosphate
 b)Base + Sugar + Phosphate
 c)Base + Sugar - OH
 d)(Base + Sugar + Phosphate)n

13. In a cell,digestive enzymes mostly occur in

 a)Ribosomes
 b)Lysosomes
 c)Mitochondria
 d)Plastids

14. Of the total enzymes present in a cell, mitochondria account for

 a)40%
 b)70%
 c)95%
 d)10%

15. Enzymes having slightly different molecular struicture but performing identical activity are

 a)Homoenzymes
 b)Isoenzymes
 c)Apoenzymes
 d)Coenzymes

16. Combination of apoenzyme and coenzyme produces

 a)Prosthetic group
 b)Holoenzyme
 c)Enzyme-substrate complex
 d)Enzyme-product complex

17. Enzymes,vitamins and hormones are common in

 a)Being proteinaceous
 b)Being synthesised in the body of organisms
 c)Enhansing oxidative metabolism
 d)Regulating metabolism

18. Enzymes are different from catalysts in

 a)Being proteinaceous
 b)Not used up in reaction
 c)Functional at high temperature
 d)Having high rate of diffusion

19. Zymogen is a

 a)Vitamin
 b)Enzyme precursor
 c)Modulator
 d)Hormone

20. Lactic dehyrogenease (LDH) that takes part in catalysis of pyruvate lactate is an example of

 a)Isoenzyme
 b)Zymogen
 c)Coenzyme
 d)Apoenzyme

21. In AGCT of DNA hydrogen bonds and base pairings occur between

 a)A-U,C-G
 b)A-C,G-T
 c)A-G,C-T
 d)A-T,C-G

22. The two strands of DNA are held together by bonds of

 a)Nitrogen
 b)Oxygen
 c)Hydrogen
 d)Carbon

23. A storage protein is

 a)Keratin
 b)Collagen
 c)Haemoglobin
 d)Glutelin/Globulin

24. Diameter of DNA is/Wilkin's X-ray diffraction showed DNA diameter to be

 a)200A
 b)100A
 c)20A
 d)50A

25. On hydrolysis, nucleic acid produces

 a)Sugars only
 b)Nitrogen bases only
 c)Phosphoric acid
 d)All the above

26. The basic unit of a nucleic acid is

 a)Pentose sugar
 b)Nucleoid
 c)Nucleoside
 d)Nucleotide

27. Which one is nucleotide

 a)Uridylic acid
 b)Thymidine
 c)Cytosine
 d)Glutamic acid

28. Nuclocotide found free in the cell is

 a)cAMP
 b)AMP
 c)ADP
 d)ATP

29. A nucleotide is formed of

 a)Purine,Pyrimidine and phosphate
 b)Purine,Sugar and phosphate
 c)Nitrogen base, Sugar and phosphate
 d)Pyrimidine, Sugar and phosphate

30. Which one is the hydrogen acceptor?

 a)CoA
 b)NADP+
 c)ATP
 d)DNA

31. A complex formed by deoxyribose sugar,phosphate and nitrogen base is

 a)Amino acid
 b)Polypeptide
 c)Nucleoside
 d)Nucleotide

32. Chromosomes appearing rod shaped during anaphase are

 a)Acrocentric
 b)Metacentric
 c)Submetacentric
 d)Telocentric

33. Point at which polytene Chromosomes appear attached is

 a)Centriole
 b)Chromocentre
 c)Chromomere
 d)Centromere

34. Metaphasic Chromosome with medial centromere and equal arm is

 a)Telocentric
 b)Acrocentric
 c)Metacentric
 d)Submetacentric

35. Chromosome with equal arms is

 a)Acrocentric
 b)Metacentric
 c)Submetacentric
 d)Telocentric

36. Chromosome end is called

 a)Telomere
 b)Centromere
 c)Satellite
 d)Metamere

37. Chromosomes can be counted best at the stage of

 a)Telephase
 b)Late Anaphase
 c)Metaphase
 d)Late Prosphase

38. Chromosome is made of

 a)DNA
 b)DNA and protiens
 c)DNA,RNA and proteins
 d)RNA and proteins

39. Semi-autonomous organelle is

 a)E.R.
 b)Lysosome
 c)Peroxisome
 d)Chloroplast

40. Raphides are formed of

 a)Calcium oxalate
 b)Calcium carbonate
 c)Sodium chloride
 d)Sodium carbonate

41. Detoxification site in liver is

 a)Free ribosomes
 b)Golgi complex
 c)SER
 d)RER

42. Vacuole is covered by a membrane called

 a)Tonoplast
 b)Plasmalemma
 c)Cell membrane
 d)Cell wall

43. A single unit membrane surrounds the organelle

 a)Nucleus
 b)Mitochondrion
 c)Lysosome
 d)Chloroplast

44. Oxysomes or F0F1 particles occur on

 a)Thylakoids
 b)Mitochondrial surface
 c)Inner mitochondrial membrane
 d)Chloroplast surface

45. Electron microscope has revealed the presence of

 a)Ribosomes
 b)Chromosomes
 c)Chloroplast
 d)Leucoplast

46. Nuclear material of bacterial cell is known as

 a)Nucleus
 b)Nucleolus
 c)Plasmid
 d)Nucleoid

47. Bacterial cell wall is composed of

 a)Lipid
 b)Cellulose
 c)Chitin
 d)Mucopeptide/Peptidoglycan

48. Diaminopimelic acid and muramic acid occur in the wall of

 a)Bacteria
 b)Fungi
 c)Brown algae
 d)Higher plants

49. In bacteria the respiratory enzymes are situated in the part

 a)Cell membrane
 b)Cytoplasm
 c)Mitochondria
 d)Ribosomes

50. According to fluid mosaic model,plasma membrane is composed of

 a)Phospolipids and oligosaccharides
 b)Phospolipids and hemicellulose
 c)Phospolipids and integral proteins
 d)Phospolipids and extrinsic proteins and intrinsic proteins