Question
Distinguish between the following.
DNA and RNA
DNA and RNA
| DNA | RNA |
| 1. DNA is deoxyribonucleic acid. | 1. RNA is ribonucleic acid. |
| 2. DNA is double stranded, helical molecule. | 2. RNA is single stranded molecule. |
| 3. In DNA, there is deoxyribose sugar. | 3. In RNA, there is ribose sugar. |
| 4. The pyrimidine nitrogen bases are cytosine and thymine. | 4. The pyrimidine nitrogen bases are cytosine and uracil. |
| 5. DNA is the genetic material in all types of organisms. | 5. RNA is genetic material in few viruses only. |
| 6. In eukaryotic cells, DNA is present in nucleus. | 6. In eukaryotic cells, RNA is present in nucleus as well as cytoplasm. |
| 7. The number of purine : pyrimidine ratio is always 1 : 1 in DNA molecule. | 7. The number of purine : pyrimidine ratio may not be 1 : 1 in RNA molecule. |
| 8. DNA sends the codon for the synthesis of proteins, but otherwise it does not participate in the protein synthesis. | 8. RNA takes part in the protein synthesis through transcription and translation. |
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| Column A | Column B |
| (1) Brown heart disease | ————- |
| (2) Bakane disease of Rice | ———— |
| (3) Die back of shoot | ————- |
| (4) Degreening of Banana | ————- |
| Column A (Adaptation) | Column B (Type of pollination) |
| (1) Sticky, spiny pollen grains non-fragrant flowers | (a) Anemophily |
| (2) Feathery stigma and versatile anther | (b) Chiropterophily |
| (3) Presence of nectar glands and sweet smell | (c) Ornithophily |
| (4) Dull coloured flowers with strong fragrance | (d) Entomophily |