| 1. | Virus | 2. | Phage |
| 3. | Bacterium | 4. | Yeast |
| Assertion (A): | All vertebrates are chordates but all chordates are not vertebrate. |
| Reason (R): | The members of subphylum vertebrata possess notochord during the embryonic period, the notochord is replaced by a cartilaginous or bony vertebral column in adults. |
| 1. | (A) is True but (R) is False. |
| 2. | (A) is False but (R) is True. |
| 3. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 4. | Both (A) and (R) are True but (R) is not the correct explanation of (A) |
| 1. | To repair damaged DNA |
| 2. | To regulate cell growth |
| 3. | To separate the chromosomes |
| 4. | To synthesize new DNA |
| List-I | List-II | ||
| A. | Alfred Hershey and Martha Chase | I. | Streptococcus pneumoniae |
| B. | Euchromatin | II. | Densely packed and dark- stained |
| C. | Frederick Griffith | III. | Loosely packed and light-stained |
| D. | Heterochromatin | IV. | DNA as genetic material confirmation |
| 1. | A-IV, B-III, C-I, D-II | 2. | A-III, B-II, C-IV, D-I |
| 3. | A-II, B-IV, C-I, D-III | 4. | A-IV, B-II, C-I, D-III |
| List-I | List-II | ||
| A. | Adenosine | I. | Nitrogen base |
| B. | Adenylic acid | II. | Nucleotide |
| C. | Adenine | III. | Nucleoside |
| D. | Alanine | IV. | Amino acid |
| 1. | A-III, B-II, C-I, D-IV | 2. | A-II, B-III, C-I, D-IV |
| 3. | A-III, B-IV, C-II, D-I | 4. | A-III, B-II, C-IV, D-I |
| A. | Transport of pre-mRNA to the cytoplasm prior to splicing |
| B. | Removal of introns and joining of exons. |
| C. | Addition of methyl group at 5' end of hnRNA. |
| D. | Addition of adenine residues at 3' end of hnRNA. |
| E. | Base pairing of two complementary RNAs. |
| 1. | B, C, E only | 2. | C, D, E only |
| 3. | A, B, C only | 4. | B, C, D only |
| 1. | \(2n+1\) | 2. | \(2N^2\) |
| 3. | \(N^2\) | 4. | \(2^n\) |
| Assertion (A): | Both wind and water pollinated flowers are not very colourful and do not produce nectar. |
| Reason (R): | The flowers produce enormous amount of pollen grains in wind and water pollinated flowers. |
| 1. | (A) is True but (R) is False. |
| 2. | (A) is False but (R) is True. |
| 3. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 4. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 1. | Predation | 2. | Amensalism |
| 3. | Commensalism | 4. | Mutualism |