Genetic Code and Regulation – Section 1


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11. The sequence of one strand of DNA is: 5′ ATTGCCA 3′, what is the sequence of the other strand?

A. 5′ TAACGGT 3′
B. 5′ TGGCAAT 3′
C. 5′ ATTGCCA 3′
D. 5′ UAAGCCU3′

Correct Answer: B. 5′ TGGCAAT 3′
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12. In prokaryotes, AUG encodes

A. methionine
B. N-formyl methionine
C. a stop codon
D. alanine

Correct Answer: B. N-formyl methionine
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13. How many amino acids will be encoded by 5′ GAU GGU UGA UGU 3′ sequence?

A. One
B. Two
C. Three
D. Four

Correct Answer: B. Two
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14. In protein synthesis in prokaryotes

A. the initiating amino acid is N- formyl methionine
B. the initiating amino acid is methionine
C. the initiating amino acid is phenyl alanine
D. none of the above

Correct Answer: A. the initiating amino acid is N- formyl methionine
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15. AUG codes for methionine act as a

A. initiation code
B. elongation code
C. termination code
D. propagation code

Correct Answer: A. initiation code
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