Which of the following is an incorrect statement?
| 1. | The perinuclear space forms a barrier between the materials present inside the nucleus and that of the cytoplasm. |
| 2. | Nuclear pores act as passages for proteins and RNA molecules in both directions between nucleus and cytoplasm. |
| 3. | Mature sieve tube elements possess a conspicuous nucleus and usual cytoplasmic organelles. |
| 4. | Microbodies are present both in plant and animal cells. |
Complete the flow chart on central dogma
| 1. | (a) - Replication; (b) - Transcription; (c) - Translation; (d) - Protein |
| 2. | (a) - Transduction; (b) - Translation; (c) - Replication; (d) - Protein |
| 3. | (a) - Replication; (b) - Transcription; (c) - Transduction; (d) - Protein |
| 4. | (a) - Transcription; (b) - Replication; (c) - Transcription; (d) - Transduction |
Which of the following is a correct sequence of steps in a PCR (Polymerase Chain Reaction)?
1. Extension, Denaturation, Annealing
2. Annealing, Denaturation, Extension
3. Denaturation, Annealing, Extension
4. Denaturation, Extension, Annealing
During the purification process for recombinant DNA technology, addition of chilled ethanol precipitates out:
| 1. | Histones | 2. | Polysaccharides |
| 3. | RNA | 4. | DNA |
Mutations in plant cells can be induced by:
1. Gamma rays
2. Zeatin
3. Kinetin
4. Infrared rays
Which of the following statements is not correct?
| 1. | Pyramid of energy is always upright. |
| 2. | Pyramid of numbers in a grassland ecosystem is upright. |
| 3. | Pyramid of biomass in sea is generally inverted. |
| 4. | Pyramid of biomass in sea is generally upright. |
Match List-I with List-II.
| List-I | List-I | ||
| (a) | Lenticels | (i) | Phellogen |
| (b) | Cork cambium | (ii) | Suberin deposition |
| (c) | Secondary cortex | (iii) | Exchange of gases |
| (d) | Cork | (iv) | Phelloderm |
Choose the correct answer from the options given below:
| (a) | (b) | (c) | (d) | |
| 1. | (ii) | (iii) | (iv) | (i) |
| 2. | (iv) | (ii) | (i) | (iii) |
| 3. | (iv) | (i) | (iii) | (ii) |
| 4. | (iii) | (i) | (iv) | (ii) |
The site of perception of light in plants during photoperiodism is:
1. Axillary bud
2. Leaf
3. Shoot apex
4. Stem
The factor that leads to Founder effect in a population is:
1. Mutation
2. Genetic drift
3. Natural selection
4. Genetic recombination
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