試題詳解

25. If a sample of DNA is found to have the base composition (molar ratios) of adenine, 40； thymine, 22； guanine, 19 and cytosine, 19, what conclusion can be drawn?
(A) The DNA is a circular duplex.
(B) The DNA is a linear duplex.
(C) The DNA is single stranded.
(D) The DNA has highly repetitive sequences.
(E) The DNA has a high melting temperature.