Question
Distinguish between the following.
DNA in prokaryotic and eukaryotic cells.
DNA in prokaryotic and eukaryotic cells.
| DNA in prokaryotes | DNA in eukaryotic |
| 1. It is present in the cytoplasm. | 1. It is present in the nucleus. |
| 2. It is not associated with histones. | 2. It is associated with histones. |
| 3. It is circular. | 3. It is linear. |
| 4. Genes do not contain introns. | 4. Genes contain introns along with exons. |
| 5. Genes are polycostronic. | 5. Genes are monocistronic. |
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| Animal | Respiratory organ |
| (1) Fishes | (a) Trachea |
| (2) Birds/Reptiles | (b) Moist cuticle |
| (3) Insects | (c) Gills |
| (4) Earthworm | (d) Lungs |
| Column I [Contraceptive method] | Column II [Mode of action] |
| (1) Pill | (a) Prevents sperms reaching cervix |
| (2) Condom | (b) Prevents implantation |
| (3) Vasectomy | (c) Prevents ovulation |
| (4) Copper T | (d) Semen contains no sperms |