Q. No.The destruction of the biological nature and activity of proteins by heat or chemical agent is called :-
1.
Dehydration
2.
Denaturation
3.
De-nitrogenation
4.
Deamination
The complementary base of adenine in one strand to that in the other strand of DNA is:
1. Cytosine
2. Guanine
3. Uracil
4. Thymine
The function of DNA is:
| 1. | To synthesize RNA. |
| 2. | To synthesize the necessary proteins. |
| 3. | To carry the hereditary characteristics from generation to generation. |
| 4. | All of the above. |
In both DNA and RNA heterocyclic base and phosphate ester linkages are at:
1. \(C^1_5\) and \(C^1_2\) respectively of the sugar molecule.
2. \(C^1_2\) and \(C^1_5\) respectively of the sugar molecule.
3. \(C^1_1\) and \(C^1_5\) respectively of the sugar molecule.
4. \(C^1_5\) and \(C^1_1\) respectively of the sugar molecule.
The incorrect statement among the following is:
| 1. | Insulin maintains the sugar level in the blood of a human body. |
| 2. | Ovalbumin is a simple food reserve in egg white. |
| 3. | Blood proteins thrombin and fibrinogen are involved in blood clotting. |
| 4. | Denaturation makes the proteins more active. |
The correct statement regarding RNA and DNA, respectively is:
| 1. | The sugar component in RNA is ribose and the sugar component in DNA is 2'- deoxyribose. |
| 2. | The sugar component in RNA is arabinose and the sugar component in DNA is ribose. |
| 3. | The sugar component in RNA is 2'-deoxyribose and the sugar component in DNA is arabinose. |
| 4. | The sugar component in RNA is arabinose and the sugar component in DNA is 2'- deoxyribose. |
The correct option about the presence of H-bond in nucleotides is:
1. A-T, G-C
2. A-G, T-C
3. G-T, A-C
4. A-A, T-T
The couplings between base units of DNA is through :
| 1. | Hydrogen bonding | 2. | Electrostatic bonding |
| 3. | Covalent bonding | 4. | Van der waal's forces |
In humans, the main oxygen carrier in the blood is -
1. Hemocyanin
2. Proteins
3. Haemoglobin
4. Both microorganisms and haemoglobin.
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