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Read the following four statements (A-D).
(A) In transcription, adenosine pairs with uracil.
(B) Regulation of lac operon by repressor is referred to as positive regulations.
(C) The human genome has approximately 50,000 genes.
(D) Haemophilia is a sex-linked recessive disease.
How many of the above statements are correct
Options
(a) Two
(b) Three
(c) Four
(d) One
Correct Answer:
Two
Explanation:
Statement A & D is correct. Regulation of lac operon by repressor is referred as negative regulation. In negative regulation, a repressor molecule binds to the operator of an operon and terminates transcription. In positive regulation, an activator interacts with the RNA polymerase in the promoter region to initiate transcription. Human genome contains some 20,000 – 25,000 genes billion bases.
Related Questions: - At retrogressive metamorphosis, the urochordate larva
- Incomplete oxidation of glucose into pyruvic acid with several intermediate steps
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Topics: Genetics
(204)
Subject: Biology
(4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- At retrogressive metamorphosis, the urochordate larva
- Incomplete oxidation of glucose into pyruvic acid with several intermediate steps
- Which of the metabolites is common to respiration mediated breakdown of fats
- A fruit developed from a condensed inflorescence is
- In Opunita and other succulents, night time R.Q is
Topics: Genetics (204)
Subject: Biology (4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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