The shorter and longer arms of submetacentric chromosome are referred to as:
1. m-arm and n-arm respectively
2. s-arm and l-arm respectively
3. p-arm and q-arm respectively
4. q-arm and p-arm respectively
The chromosomes in which the centromere is situated close to one end are:
Match List - I with List - II.
| List - I | List - II | ||
| (a) | Metacentric chromosome | (i) | Centromere situated close to the end forming one extremely short and one very long arms |
| (b) | Acrocentric chromosome | (ii) | Centromere at the terminal end |
| (c) | Sub-metacentric | (iii) | Centromere in the middle forming two equal arms of chromosomes |
| (d) | Telocentric chromosome | (iv) | Centromere slightly away from the middle forming one shorter arm and one longer arm |
Choose the correct answer from the options given below:
| (a) | (b) | (c) | (d) | |
| 1. | (i) | (ii) | (iii) | (iv) |
| 2. | (iii) | (i) | (iv) | (ii) |
| 3. | (i) | (iii) | (ii) | (iv) |
| 4. | (ii) | (iii) | (iv) | (i) |
| Column I | Column II | |
| 1. | Lampbrush | Diplotene bivalents chromosomes |
| 2. | Allosomes | Sex chromosomes |
| 3. | Submetacentric | L-shaped chromosomes |
| 4. | Polytene | Oocytes of amphibians chromosomes |
| I: | Centromere placement very close to the top, p arms not visible |
| II: | q arms are much longer than the p arms. |
| III: | p and q arms are very close in length but not equal. |
| IV: | p and q arms are equal in length. |
| A: | I is Acrocentric and II is Telocentric |
| B: | III is Metacentric and IV is Sub-metacentric |
| C: | I is Telocentroic and II is Acrocentric |
| D: | III is sub-metacentric and IV is Metacentric |
Identify the statement that correctly describes the amount of DNA in a typical somatic cell of human body?
| 1. | A single human cell has approximately one metre long thread of DNA distributed among its twenty three (one set) chromosomes. |
| 2. | A single human cell has approximately two metre long thread of DNA distributed among its twenty three (one set) chromosomes. |
| 3. | A single human cell has approximately two metre long thread of DNA distributed among its forty six (twenty three pairs) chromosomes. |
| 4. | A single human cell has approximately one metre long thread of DNA distributed among its forty six (twenty three pairs) chromosomes. |