- 1(current)
Q. No.Proteins are found to have two different types of secondary structures via -helix and -pleated sheet structure. The -helix structure of a protein is stabilized by-
1. Peptide bonds
2. Van der waals forces
3. Hydrogen bonds
4. Dipole-dipole interactions
Each polypeptide in a protein has amino acids linked with each other in a specific sequence. This sequence of amino acids is said to be .....
1. Primary structure of proteins
2. Secondary structure of proteins
3. Tertiary structure of proteins
4. Quaternary structure of proteins
Examples of globular proteins are:
| a. | Insulin | b. | Keratin |
| c. | Albumin | d. | Myosin |
Choose the correct option :
1. a and b
2. b and c
3. c and d
4. a and c
Given below are two statements:
| Assertion (A): | All naturally occurring α -amino acids except glycine are optically active. |
| Reason (R): | Most naturally occurring amino acids have L-configuration. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | (A) is false but (R) is true. |
Given below are two statements:
| Assertion (A): | Glycine must be taken through diet. |
| Reason (R): | It is an essential amino acid. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | Both (A) and (R) are false. |
Given below are two statements:
| Assertion (A): | In presence of an enzyme, the substrate molecule can be attacked by the reagent effectively. |
| Reason (R): | Active sites of enzymes hold the substrate molecule in a suitable position. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are FALSE. |
| 3. | (A) is true but (R) is false. |
| 4. | (A) is false but (R) is true. |
- 1(current)
Q. No.
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