Question

Which of the following statements are correct?

(i) Restriction enzymes cut the strand of DNA a little away from the centre of the palindrome site, but between the same two bases on the opposite strands.

(ii) Hind II always cuts DNA molecules at a particular point by recognising a specific sequence of six base pairs.

(iii) Separated DNA fragments cannot be visualised without staining on an agarose gel electrophoresis.

(iv) Ori is the sequence responsible for controlling the copy number.

(v) DNA is a positively charged molecule.

• A. (i), (iii) and (v)
• B. (i), (ii), (iii) and (iv)
• C. (iii), (iv) and (v)
• D. (i), (ii), (iii), (iv) and (v)

Answer 1

The correct option is B (i), (ii), (iii) and (iv)

From the above options we can say that DNA is a negatively charged molecule whether the rest four given options are right.
So, the correct option is option B.