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INDIAN SCHOOL MUSCAT
SENIOR SECTION
DEPARTMENT OF BIOLOGY
CLASS XII
MOLECULAR BASIS OF INHERITANCE
ENRICHMENT WORKSHEET - 6
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Why is regulation of lac operon said to be negative control?
Given below is a part of the template strand of a structural gene
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TAC CAT TAG GAT
a) Write its transcribed mRNA strand with its polarity.
Explain the mechanism involved in initiation of transcription of this strand
a)Explain Griffith’s experiments where he witnessed transformation in bacteria he worked with.
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b) Name the scientists responsible for determining the biochemical nature of “transforming
principle” in Griffith’s experiments. What did they prove?
1. Describe the experiment conducted by Alfred Hershey and Martha Chase for
identification of genetic material.
2. Why is it considered path breaking in the field of molecular biology.
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Where are anticodons seen? What is the codon of anticodon AUG?
ISM/SENIOR SECTION/BIOLOGY/MAY 2016
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