The proportion of adenine in DNA from an organism is 20%. Which of the following statements regarding the DNA from this organism is INCORRECT? The proportion of guanine in DNA is 20%. The proportion of cytosine in DNA is 30%. The proportion of thymine in DNA is 20%. The proportion of guanine and cytosine in DNA is 60% The proportion of guanine in DNA is 30%. The proportion of adenine and thymine in DNA is 40%