1 Problem 1 The one gene one enzyme hypothesis was an import
| 1. | (Problem 1) The one gene, one enzyme hypothesis was an important advance in our understanding of genetics because | ||||||||||
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Solution
Answer 1: Option E
One gene one enzyme clarified one concept that one gene can code for a single protein chain only or we can say enzyme. Different chains are coded by different genes. Earlier it was thought that even if a protein was a complex one, made of many subunits, all of them were coded by same gene. But was proved wrong.
Answer 2: Option E
First of all, since we need a DNA template, the direction would be 3\' to 5\'. That\'s why option B and D are incorrect.
Next is that codons are degenerate. It means that single amino acid can be coded by more than one triplet codon. Here, histidine is coded by two codons. Therefore, we have two possible DNA templates, both coding for the same chain of amino acids.
Answer 3: Option B
In the direction of movement of ribosome over mRNA is towards the codon ACG. Now since the direction of mRNA is 5\' to 3\', the anticodon would be anti-parallel and complementary, i.e. 3\'- UGC-5\'.
Answer 4: Option 4
Ori stands for \"origin of replication\". Therefore, its clear that if ori region is deleted, replication would be affected.
