Assertion (A): | Expressed sequence tags (ESTS) which was used in human genome project it identify all the genes that are expressed as DNA. |
Reason (R): | Complete DNA sequence is decoded. |
1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
3. | (A) is true but (R) is false. |
4. | Both (A) and (R) are false. |
1. | If UGA, usually a stop codon, is found to code for an amino acid such as tryptophan (usually coded for by UGG only). |
2. | If one stop codon, such as UGA, is found to have a different effect on translation than another stop codon, such as UAA. |
3. | If prokaryotic organisms are able to translate a eukaryotic mRNA and produce the same polypeptide. |
4. | If several codons are found to translate to the same amino acid, such as serine. |
1. | The number of repeats varies widely from person to person or animal to animal. |
2. | The sequence of DNA that is repeated varies, significantly, from individual to individual. |
3. | The sequence variation is acted upon differently by natural selection in different environments. |
4. | Every racial and ethnic group has inherited different short tandem repeats. |
1. | Uracil | 2. | Thymine |
3. | Cytosine | 4. | Guanine |
Assertion (A): | Histones are basic proteins of major importance in packaging of eukaryotic DNA. DNA and histones comprise chromatin, forming the bulk of eukaryotic chromosome. |
Reason (R): | Histones are of five major types H1, H2A, H2B and H3 and H4 |
1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
3. | (A) is true but (R) is false. |
4. | Both (A) and (R) are false. |