| I. In transcription, adenosine pairs with uracil. |
| II. Regulation of lac operon by represser is referred to as positive regulation. |
| III. The human genome has approximately 50000 genes. |
| IV. Haemophilia is a sex-linked recessive disease. |
A) Two
B) Three
C) Four
D) One
Correct Answer: A
Solution :
Transcription is the process of synthesis of RNA on the DNA template. During transcription adenosine pairs with uracil. Represser gene determines the transcription of structural gene. It codes for represser protein. After synthesis the represser molecule is diffused from the ribosome and bind to the operator in absence of inducer. The human genome has approximately 30000 genes with -3.2 billion base pairs.
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