| List- I | List- II | ||
| A | Chargaff | 1 | Wilkin and Franklin |
| B | Replicon | 2 | Uptake of lactose |
| C | Permease | 3 | hn RNA |
| D | Split gene | 4 | Length of DNA |
| E | X- ray diffraction studies | 5 | (A + G) = (C + T) |
A) A-5 B-4 C-2 D-3 E-1
B) A-5 B-4 C-1 D-3 E-2
C) A-5 B-4 C-2 D-1 E-3
D) A-5 B-1 C-2 D-3 E-4
Correct Answer: A
Solution :
E. Chargaff (1950) demonstrated that in DNA the numbes of adenine and thymine groups are always equal and so the number of guanine and cytosine also. - Wilkins and his associate Franklin managed to prepare highly oriented DNA fibres that allowed them to obtain an X-ray diffraction photograph. - DNA replication in prokaryotes and eukaryotes is attained in discrete units called replicons. The number of replicons depend on length of genome. - Split genes are those genes which possess non-functional genes among functional genes. The non-functional are called introns whereas the functional one as exons. The enzyme permease (glactoside permease) is a plasma-membrane bound protein that facilitates the entrance of lactose into the cell.
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