1. | is present only when glucose levels are very low |
2. | is present only when lactose is freely available |
3. | is present in a low amount all the time |
4. | is not required for using lactose as a source of energy by the cell |
Assertion (A): | Today, DNA from a single cell is enough to perform DNA fingerprinting analysis. |
Reason (R): | The use of PCR has increased the sensitivity of DNA fingerprinting. |
1. | Both (A) and (R) are True and (R) correctly explains (A) |
2. | (A) is True but (R) is False |
3. | (A) is False but (R) is True |
4. | Both (A) and (R) are True but (R) does not correctly explain (A) |
1. | They are polynucleotides. |
2. | Together with polysaccharides and polypeptides, these comprise the true macromolecular fraction of any living tissue or cell. |
3. | A nucleotide has three chemically distinct components: a heterocyclic compound, a monosaccharide, and a phosphoric acid or a phosphate. |
4. | The hexose sugar found in polynucleotides is either ribose or 2’deoxyribose. |
1. | 20 | 2. | 80 |
3. | 60 | 4. | 40 |
Statement I: | In prokaryotes, the positively charged DNA is held with some negatively charged proteins in a region called nucleoid. |
Statement II: | In eukaryotes, the negatively charged DNA is wrapped around the positively charged histone octamer to form nucleosome. |
List I | List II | ||
A. | Gene 'a' | I. | \(\beta\)-galactosidase |
B. | Gene 'y' | II. | Transacetylase |
C. | Gene 'i' | III. | Permease |
D. | Gene 'z' | IV. | Repressor protein |
Options: | A | B | C | D |
1. | III | I | IV | II |
2. | II | I | IV | III |
3. | II | III | IV | I |
4. | III | IV | I | II |
1. | Probe | 2. | BAC |
3. | YAC | 4. | PBR322 |