Biochemistry - DNA Structure and Replication

Exercise :: DNA Structure and Replication - Section 1

21. 

The overall conclusion of the Hershey-Chase experiment was that

A. DNA was responsible for heredity
B. proteins and DNA were responsible for heredity
C. the ratio of Adenine to thymine was always the same
D. phage DNA was similar to bacterial DNA

Answer: Option A

Explanation:

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22. 

A cesium chloride will separate DNA molecules by

A. absorption
B. resorption
C. density
D. adhesion

Answer: Option C

Explanation:

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23. 

If one cell has AT contents 40%, what will be the percentage of Guanine residue?

A. 60%
B. 15%
C. 30%
D. Guanine residue can not be calculated

Answer: Option C

Explanation:

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24. 

Which of the following enzyme adds complementary bases during replication?

A. Helicase
B. Synthesase
C. Replicase
D. Polymerase

Answer: Option D

Explanation:

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25. 

Which DNA polymerase removes RNA primers in DNA synthesis?

A. Polymerase I
B. Polymerase II
C. Polymerase III
D. none of these

Answer: Option A

Explanation:

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