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1. In DNA sequencing, the primer

A. specifies where the sequence ends
B. specifies where the sequence begins
C. both (a) and (b)
D. generates variety of different sized fragments

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2. The chromosome of almost all bacteria is in the shape of

A. an open circle
B. helix
C. a closed circle
D. a linear chromosome

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3. In which of the following uracil is present?

A. RNA
B. DNA
C. Both (a) and (b)
D. None of these

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4. To which of the following adenine always binds?

A. Guanine
B. Cytosine
C. Thymine
D. None of these

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5. Guanine always binds to

A. cytosine
B. guanine
C. thymine
D. none of these

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