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
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
3. In which of the following uracil is present?
A. RNA
B. DNA
C. Both (a) and (b)
D. None of these
4. To which of the following adenine always binds?
A. Guanine
B. Cytosine
C. Thymine
D. None of these
5. Guanine always binds to
A. cytosine
B. guanine
C. thymine
D. none of these
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