1. A molecule of ATP is structurally most similar to a molecule of?
Correct : A. RNA
2. Which is the site of protein synthesis?
Correct : C. Polysomes
3. Select the specific base pairs of DNA:
Correct : C. Adenine and Thymine
4. The DNA stands are antiparallel because of:
Correct : B. Phosphodiester bond
5. The distance between two chains of DNA molecules is:
Correct : B. 20 A°
6. The length of one complete spiral of DNA is:
Correct : A. 34 A°
7. Which one of the following bases is found only in RNA and not in DNA?
Correct : C. Uracil
8. The scientists who discovered the structure of DNA molecule
Correct : D. Waston and Crick
9. Mention the example of dinuclotide in the given structure.
Correct : A. RNA with UA
10. The structure of DNA like a spiral ladder because
Correct : D. Two polynucleotide chains arranged parallel to each other and are spirally Twisted
11. The hydrogen bonds between adenine and guanine are
Correct : D. 0
12. Which of the following is correct?
Correct : A. A=T
13. Nitrogen bases do not contain
Correct : A. Phosphorus
14. Which one is two ringed nitrogenous base?
Correct : B. Adenine
15. Which of the following ratio is constant in the DNA of all the species?
Correct : D. A+T / C+G
16. m-RNA is the polymer of
Correct : A. Ribonucleotide
17. Which of the following is incorrect?
Correct : B. t-RNA are synthesized by m-RNA
18. Which is longest of all RNA?
Correct : A. m-RNA
19. The common instant source of energy of cellular activities is
Correct : D. ATP
20. Which one is known as adapter molecule?
Correct : C. t-RNA
21. The RNA transporting amino acid to the protein synthesizing site known as
Correct : A. t-RNA
22. Match the column and find out the correct combination
Column –I Column –II
(P) Keratin (i) co-enzyme
(Q) ATP (ii) pyrimidline
(R) Cytosine (iii) polynucleotide
(S) NAD (iv) Purine
(T) Guanine (v) polypeptide
Correct : A. P-v, Q-iii, R-ii, S-i, T-iv
23. Which is the special function of t-RNA?
Correct : D. An adapter for attaching amino acid to m-RNA template during Protein synthesis
24. Which are proportionally more compounds in all RNA’s?
Correct : C. r-RNA
25. Which is the part of DNA molecules that varies among DNA molecule
Correct : B. nitrogen base
26. which kind of arrangement lies in the two polynucleotide chain of DNA?
Correct : A. Antiparallel and complementary
27. If the one base chain sequence of DNA is ACGTTGG then what will be the base Sequence of opposite chain
Correct : B. Chemicals which act as biological catalysts
30. Which of the following is not true for enzyme
Correct : C. Used up in the biochemical reaction
31. What is Ribozymes?
Correct : C. Some nucleic acids that behave like enzyme
32. Enzymes are present in which parts of plant?
Correct : D. in all the living cell of plant body
33. What is an apoenzyme?
Correct : A. Protein
34. What is co – enzyme?
Correct : C. Often a vitamin
35. Find out the correct function of co-enzyme?
Correct : A. In association with apoenzyme and make it effective
36. Which one property is not true for enzyme?
Correct : C. All enzymes are bidirectional
37. The rate of most of enzyme catalyzed reaction changes with PH as the PH Increases this rate?
Correct : A. Reaches a maximum
38. Near freezing point an enzyme is
Correct : B. Inactivated
39. A temperature change from 30o
C to 50o
C the rate of enzyme actively will:
Correct : C. First increase and then decrease
40. An enzyme brings about
Correct : C. Decrease in activation energy level
41. Enzymes are polymers of:
Correct : C. Amino acid
42. Which one is not correct for enzyme?
Correct : D. All proteins are enzymes
43. Inorganic catalyst recognized what when it attached an enzyme?
Correct : A. Activator
44. At which place the substrate combines with the enzymes:
Correct : A. Active site
45. Fill it E + S ________
Correct : B. E-S complex
46. Enzyme and substrate complementary each other such as
Correct : C. Lock & key
47. Which one of the following chemical is classified as an enzyme?
Correct : D. Sucrase
48. In the cell digestive enzymes are mostly in which cell organells?
Correct : C. Lysosomes
49. Enzymes are named after their substrate adding suffix –
Correct : B. — ase
50. The enzyme which removes hydrogen from the substrate is known as:
Correct : B. Dehydrogenase
51. The product is realized from which site of the enzyme?
Correct : B. active site
52. What ‘A’ and ‘B’ indicates in the given figure (reaction)?
Correct : C. A= ES complex B=E
53. which of the following enzyme would correct glucose in to glucose-6-phosphate
Correct : D. Trans ferase
54. Glucose + ATP glucose – 6-phosphate +ADP which enzyme occur this reaction?
Correct : D. Hexokinase
55. which enzyme would change glucose – 6 phosphate to fructose – 6 phosphate?
Correct : B. Isomerase
56. which enzyme involved in hydrolysis of maltose to glucose?
Correct : B. maltase
57. the enzyme which also known as scissor?
Correct : A. Lyases
58. which enzyme involved in conversion of a molecular in to an isomer?
Correct : C. Isomerase
59. The enzyme which break up fructose 1, 6 biphosphate in to fructose phosphates known?
Correct : A. Aldolase
60. Which enzyme is needed to digest food reserve in pea seeds?
Correct : C. Proteases
61. The best example of extra cellular enzyme is?
Correct : B. Digestive enzyme
62. A non-protein component of enzyme is called?
Correct : A. Co-factor
63. Which is an enzyme that joins acetic acid to Co A with the help of energy?
Correct : C. Acetyl co. A Synthetase
64. Carbonic anhydrase is activated in the presence of which elements?
Correct : D. Zn
65. Vanadium is necessary for the activation of which enzyme?
Correct : C. Nitrogenase
66. Find out the correct group of co. factor which is activated enolase?
Correct : B. Mg, Mn, Zn
67. Which one is not a co. Enzyme?
Correct : D. ADP
68. Find out the correct group of enzyme which is activated by calcium?
Correct : A. Nitric oxide Synthetase, protein phosphatase , adenylkinase
69. Which of the following sets is not co enzyme?
Correct : A. NAD, FAD, ATP
70. Co enzyme differs from prosthetic group because:-
Correct : C. They attached apoenzyme with loosely bound
71. S: protein carry out many functions in living organisms
A: all enzymes are made up of proteins
R: they are responsible for maintenance of proper rates of biochemical reaction in cell
Correct : B. S,A&R are true and R&A are the correct explanation of S
72. Most abundant organic compound on earth is [C.B.S.E.2001] [karnataka- 2000]
Correct : A. Protein
73. Which one is a simple protein? [Kerala 2004]
Correct : A. Albumin
74. Bond formed between the first phosphate group and adenosine in ATP is
Correct : D. Phosphoester bond
75. Nucleotides are building blocks of nucleic acids each nucleotide is a composite Molecule formed by [C.B.S.C. 2005]
Correct : C. base-sugar-phosphate
76. Which one is not a nucleotide? [AFMC 1998]
Correct : D. Lysine
77. Which one is a molecule of ATP? [C.B.S.C. PMT 2000]
Correct : C. nucleotide
78. t-RNA is a polymer of: [MP PMT 1997]
Correct : C. Ribonucleotide
79. Which one is Purine base of RNA? [C.B.S.E. PMT 1996]
Correct : A. Guanine
80. Enzymes are formed by conjunction of which molecule? [AFMC 1994]
Correct : C. amino acid
81. Co-enzyme means [B.H.U. 1997]
Correct : B. Vitamin
82. Enzymes in boiling water [CPMT1995]
Correct : B. Denatured
83. Which one is the contractile protein [CBSE.PMT 1998]
Correct : D. keratin
84. How many nucleotide present in DNA molecule which consist pair of 2000 N2 base? [MP.PMT 1994]
Correct : C. 10,000
85. Which one is not gain by the hydrolysis of nucleoside? [DPMT 1996]
Correct : C. Phosphoric acid
86. Enzyme by natured: [CET chd 1998]
Correct : C. polypeptide
87. The pair of nitrogen base in DNA is conjugated with [PB PMT 1997]
Correct : B. Hydrogen bond
88. The prosthetic group which is in the structure of enzyme [Manipal PMT 1997]
Correct : C. It contain organic or inorganic structure
89. Enzyme speed up rate of reaction by [C.B.S.E. 2000]
Correct : D. Covering activation energy
90. The catalytic efficiency of two different enzymes can be compared by the
Correct : A. The Km value
91. Which of the following cell organelles is rich in catabolic enzyme [PMT 2007]
Correct : C. Mitochondria
92. Enzyme which help in electron transfer are: [B.H.U. 1998]
Correct : A. Cytochrome
93. The enzyme which fixes CO2 in C4 plant is [C.B.S.E. 2000]
Correct : B. PEP carboxyl ase
94. Enzyme involved in hydrolysis of starch to maltose is called: [PMT 1999]
Correct : B. Amylase
95. In which of the following industrial areas biotechnology is applicable?
Correct : D. all of the above
96. Due to what food supply has increased during green revolution?
Correct : D. use of agrochemicals
97. The organizations whose genetic material has been altered using genetic engineering is called as -
Correct : C. Genetically modified organism
98. Full form of GMO is -
Correct : C. Genetically modified organism
99. Which of the following is responsible for causing disease in plants?