Biology MCQ Quiz Hub

1. Cell theory states
All cells are living
All cells have nucleus
Cells are fundamental structural unit of living organisms
Cell reproduce by mitosis and meiosis

2. Omnis cellula e cellula is generalisation given by
Lamarck
Dutrochet
Leeuwenhoek
Virchow

3. Detoxification of lipid soluble drugs and other harmful compounds in ER is carried out by cytochrome
C
a1-a2
b - f
P450

4. On hydrolysis, nucleoside does not yield
Phosphoric acid.
Pentose sugar.
Purines.
Pyramidine.

5. Read the following statements: (i) The polysaccharides made up of glucose monomers are cellulose, glycogen and starch. (ii) Fructose is the sweetest natural sugar. (iii) Glycine is the simplest am
Four
Five
Three
Two

6. Destructive effect of high temperature on enzyme action is due to
Formation of linkage between apoenzyme and its cofactor
Acceleration of reverse reaction
Destructive of tertiary and quaternary structure of enzymes
All of these

7. The term cell was coined by
Robert hooke
Schwann
Tatum
de Bary

8. The cell theory is not applicable to
Virus
Fungi
Bacteria
Algae

9. Semiautonomous organelle in the cell is
Chloroplasts
Peroxisomes
Gogibodies
ER

10. The membrane around the vacuole is called
Cytoplast
Tonoplast
Amyloplast
elaioplast

11. Identify the non -membraneous organelle from the following
Nucleus
Chloroplasts
ER
Ribosomes

12. The hormone adrenaline is formed from __________ amino acids
Tyrosine
Glycine
Alanine
Tryptophan

13. Microfilaments are composed mainly of a protein called
Tubulin
Actin
Myosin
Chitin

14. Experiments demonstrating the importance of the nucleus in controlling the growth of the cell was performed in
Neurospora
Star fish
Acetabularia
Leucocytes

15. Statement 1: Competitive inhibitor is also called substrate analogue. Statement 2: It resembles the enzyme in structure.
Both statements -1 and statement - 2 are true and statement - 2 is the corr
Both statements -1 and statement - 2 are true but statement - 2 is not the
Statement -1 is true and statement - 2 is false.
Statement -1 is false and statement - 2 is true.

16. Which of the following is associated with the structure of Golgicomplex ?
Quatasomes
Annuli
Cristae
None of the above

17. The subunit of prokaryotic ribosomes are
60 S+40 S
60 S+30 S
50 S+30 S
70 S+30 S

18. Match the following: Column I Column II a. Transport protein 1. Insulin b. Regulatory protein (Hormone) 2. Enzymes c. Sensory or receptor protein 3. Antibody d. Protective protein (Defence) 4. Ro
a= 6; b= 1; c = 4; d= 3; e= 5; f= 2; g= 7
a= 6; b= 1; c = 4; d= 3; e= 2; f= 5; g= 7
a= 6; b= 4; c = 1; d= 3; e= 5; f= 2; g= 7
a= 6; b= 4; c = 1; d= 3; e= 2; f= 5; g= 7

19. Plant cell wall mainly composed of
Starch
Protien
Carbohydrates
Cellulose

20. Smooth endoplasmic reticulam is the site of
Carbohydrates synthesis
Protien synthesis
Lipid synthesis
Amino acid synthesis

21. In higher plants, the shape of the chloroplast is
Cup shaped
Girdle shaped
Ribbon shaped
Discoid

22. The main function of Centrosome is
Formation of spindle fibre
Osmoregulation
Protien synthesis
Secretion

23. Assembly of two subunits 40 S and 60 S of the ribosome is
100S unit
80S unit
70A unit
90S unit

24. Which of the following is a semi-autonomous organelle ?
Mitochondria
Chloroplasts
Both A&B
Mitochondria, chloroplasts and ribosomes

25. Who coined the term mitochondria
Kolliker
Flemming
Altman
Benda

26. Myocardial muscle cells have numerous large mitochondria called as
myosomes
myocardial mitochondrions
mitosomes
sarcosomes

27. The number of mitochondria in a cell depends
pH of the cell
Shape of the cell
Both A&B
Functional state of cell

28. Which of the following statements are true about mitochondria
Mitochondria has two envelopes
Inner membrane is not permeable
Outer membrane has porin protein channels
All of the above

29. Choose the correct statement
All proteins have 20 amino acids
Both ends of protein are similar
All proteins are soluble
Proteins are formed by peptide bonds

30. Cristae are
The membraneous infolding’s of the outer membrane of mitochondria
the jelly like central matrix of mitochondria
The membraneous infolding’s of the inner membrane of mitochondria
enzymes located on the inner mitochondrial membrane

31. Which of the following element is present in very less quantity in the body
K
Ca
Mg
Cu

32. F0-F1 particles meant for ATP synthesis are present on
outer mitochondrial membrane attached to the cytosolic or C face
inner mitochondrial membrane attached to the Matrix or M face
inner mitochondrial membrane attached to the cytosolic or C face
outer mitochondrial membrane attached to the Matrix or M face

33. Which of the following stain is used to visualise mitochondrion
Acetocarmine
Haematoxylin
Orange G
Janus green

34. Which of the following is the histochemical marker for mitochondrial inner membrane
monoamine oxidase
cytochrome oxidase
malate dehydogenase
adenylate kinase

35. Coenzyme is ....
Often a vitamin
Always an inorganic compound
Always a protein
Often a metal

36. Mitoplast are
mitochondrial plastids
mitochondria without inner membrane
mitochondria without outer membrane
mitochondria without membranes

37. Energy is stored in liver and muscles as ...
Fat
Protein
Glycogen
Glucose

38. Who got Nobel Prize in 1978 for working on enzymes? ..
Koshland
Arber and Nathans
Nass and Nase
H.G. Khorana

39. Which of the following statements are incorrect regarding ER?
The adipose tissue has both SER and RER
RBC lacks both RER and SER
Plasma cells has RER only
Hepatocytes has both RER and SER

40. The term ‘ endoplasmic reticulum’ was coined by
Pomaret
Johnson
Porter
Reinert

41. Match the column ... .... [ kerala 2010] a) Sulphur 1. Chlorophyll b) Zinc 2. Nitrogenase c) Magnesium 3. Methionine d) Molybdenum 4. Auxin
a - 1, b - 2, c - 3, d -
a - 3, b - 4, c - 1, d - 2
a - 3, b - 1, c - 2, d - 4
a - 2, b - 4, c- 1, d - 3

42. Which of the following organelles has a continuous connection with nuclear membrane
Golgibodies
RER
SER
Lysosomes

43. Enzymes having slightly different molecular structure but performing identical activity are ...
Homoenzymes
Isoenzymes
Apoenzymes
Coenzymes

44. In RER, ribosomes are located on
the cytoplasmic side
on the luminal side
all through out
Both A and B

45. SER is involved in
Phospholipid biosynthesis and detoxification reaction
Phospholipid biosynthesis
Protien synthesis
Phospholipid biosynthesis and protein synthesis

46. Chitin occurs in ...
Crab
caterpillar
Agaricus
All the above

47. SER in the retinal cells are called as
Amyloid bodies
Myeloid bodies
Retinal reticulam
Sarcoplasmic reticulum

48. Glucose is stored as glycogen in ...
Pancreas
Bone
Kidney
Liver

49. The functions of RER include
Protein synthesis and post translational modification
Protein synthesis and phospholipid biosynthesis
Protein synthesis
Protein synthesis and detoxification

50. Which of the following statements are true regarding endoplasmic reticulum
SER is involved in synthesis of lipids
ER provides structural framework to the cell
ER acts as an intracellular transporting system
All of the above

51. Rough Endoplasmic Reticulum is called ‘rough’ because
rough texture of the surface
surface is studded with membrane proteins
surface is studded with ribosomes
All of these

52. RER is involved in the synthesis of
Membrane proteins and secretory proteins and nuclear proteins
Membrane proteins, secretory proteins and lysosomal proteins
Different proteins of the cell
Membrane proteins and secretory proteins

53. Which of the following organelle is involved in xenobiotic detoxification
SER
RER
Lysosome
Golgi bodies

54. Protein glycosylation occurs in the
lumen of lysosomes
lumen of smooth endoplasmic reticulum
lumen of rough endoplasmic reticulum
lumen of mitochondria

55. Ribophorins are
transmembrane glycoprotein on RER
luminal proteins on RER
luminal proteins on SER
transmembrane glycoprotein on SER

56. The most essential of the fatty acids is ...
Arachidonic acid
Linolenic acid
Linoleic acid
Oleic acid

57. Most abundant component of cell is
Protein
Water
Cellulose
Lipid

58. Which one is a fibrous protein? ...
Collagen
Globulin
Haemoglobin
Hordein

59. All enzymes are proteins". This statement is now modified because of exception to this
Arylsulphate
Ribozyme
Nitroreductase
Dehydrogenase

60. Energy currency/coin of cell is ....
ATP
NAD
ADP
GDP

61. Which is not a protein ...
Trypsin
Collagen
Rubisco
N-Acetylglucosamine

62. Enzyme are polymers of ...
Fatty acids
Amino acids
Hexose sugar
Inorganic phosphate

63. Living cell contains 60-75% water. Water present in human body is ...
60-65%
50-55%
75-80%
65-70%

64. NAD is ...
Nicotinamide adenosine diphosphate
Nicotine adenosine phosphate
Nicotinamide adenine dinucleotide
None of the above

65. Which of the following groups has cell wall
Bacteria and plants
Bacteria, fungi and plants
Bacteria, fungi, plants and animals
Bacteria, plant and animals

66. Two polypeptide chains are joined by hydrogen bonds to produce ...
α-helix
Tertiary structure
β-pleated sheet
All the above

67. Bacterial cell wall is made up of
N-acetyl glucosamine
N-acetyl muramic acid
Both a and b
N-acetyl glucosamine, N-acetyl muramic acid and amino acids

68. Which is not true of enzymes? ...
They are specific
They are made of globular proteins
Enzymes are most active at maximum temperature
They are most active at optimum temperature

69. Which of the following statements are not true regarding cell wall
Plant cell wall is made up of cellulose
Cell wall provides mechanical support to the cell
Cell was is semi-permeable
Plant cell wall is a non-living structure

70. Enzymes enhance rate of reaction by ...
Combining with product
Forming reactant product complex
Changing equilibrium of reaction
Lowering activation energy

71. Plant cell wall is made up of
Cellulose, hemicelluloses and pectin
Cellulose, hemicelluloses and chitin
Cellulose only
Cellulose and chitin

72. Nicotine and cocaine are ....
Peptides
Tannins
Alkaloids
Resin

73. Chitinous cell wall is present in
Plant
Bacteria
Protists
Fungi

74. Which is not correct? ...
All enzymes are biocatalysts
All proteins are enzymes
All enzymes are proteins
All enzymes are thermolabile

75. Pectin is stained using
Iodine
Ruthenium red
acetocrmine
Sudan III

76. Cellulose is a polymer of D-glucose units joined by
α−1,4 glycosidic linkage
β−1,6 glycosidic linkage
β−1,4 glycosidic linkage
peptide linkage.

77. Feedback inhibition is caused by blocking of enzymes by ... .
Accumulated end products
Chemicals produced by hormones
Hormones
Competitive inhibition

78. Chlorzinc Iodide is used to stain
Cellulose
Lignin
Pectin
Hemicellulose

79. Which of the following pair is monosaccharide? ...
Glucose and Fructose
Glucose and Sucrose
Ribose and Maltose
Ribose and Sucrose

80. Middle lamella is made up of pectin. Pectin is chemically
Polymer of D-glucose units
Glucoronic and galacturonic acid
Heteropolymer of xylose, mannose and arabinose
N-acetyl glucosamine and N-acetyl muramic acid

81. Calcium is required for functioning of enzyme ...
Fumarase
ATP-ase
Succinate thiokinase
Isocitrate dehydrogenase

82. Which of the following is a aromatic polymer of phenols
Cutin
Lignin
Chitin
Pectin

83. Which is not a trait of enzymes? ...
Proteinaceous nature
Specific in nature
Speed up ate of biochemical reaction
Used up in reaction

84. Fine cytoplasmic connections between neighbouring cells through the cell wall for cell to cell communication is called
Plasmosome
Plasmodesmata
Mesosome
All of these

85. Read the statements ... ... [ kerala 2008] i) Element important for production of thyroxine is iodine ii) Vitamin B6 is niacin or nicotinic acid iii) Fructose is a hexose monosaccharide iv) Globul
a, b, c are correct, d is wrong
a, c are correct, b, d are wrong
a, b are correct, c, d are wrong
a is correct, b, c d are wrong

86. Which of the following organelle is involved in cell wall synthesis
Mitochondria
Golgi apparatus
lysosome
Chloroplast

87. A fatty acid not synthesised in human body i
Cholesterol
Linoleic acid
Glycerol
None of the above

88. A storage protein is ...
Keratin
Collagen
Haemoglobin
Glutelin/Globulin

89. The form in which sugar is present in sugarcane ...
Maltose
Sucrose
Fructose
Glucose

90. Which of the following statements are true regarding cellulose synthesis
Cellulose is synthesized on the external surface of the cell
The enzyme involved is a plasma membrane bound complex called cellulose syn
UDP glucose is the precursor of cellulose
All of these

91. Temperature is increased from 3° to 40°. The rate of enzyme controlled biochemical reaction will ...
Not change
Increase
Increase initially and then decrease
Decrease

92. Secondary cell wall of plants is
Located outside the primary wall
Located inside the plasma membrane
Located inside the primary wall
Located just beneath middle lamellae

93. Base pairs present in one turn of DNA are
12
11
10
9

94. Coenzyme is often a ... ..
Carbohydrate
Protein
Vitmin
Fatty acid

95. Steroid hormones have receptors predominantly on
cell surface
Cytoplasm
both cell surface and cytoplasm
inside nucleus only

96. A nucleotide is ...
Sugar + Phosphate
Base + Sugar + Phosphate
base + Sugar - OH
(Base + Sugar+Phosphate)n

97. The major biomolecule responsible for selective uptake of materials across plasma membrane
Protein
Carbohydrate
Lipids
Phospholipids

98. The longer the fatty acid chain, fluidity of the lipid bi layer
increases
decreases
no change in fluidity
none of the above

99. Select the correct answer from the following statements ... ..1) Cutin is fatty acid polymer2) Starch is glucose polymer3) Sucrose is monosaccharide4) Maltose is polymer of fructos
1, 2, 3 are correct
1 and 2 are correct
2 and 4 are correct
1 and 3 are correct