BIOLOGY
STRUCTURE OF PROTEINS
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]


20%


30%


40%


60%

Detailed explanation1: Since adenine is 20%, then thymine is 20% as well. The total of both is 40%.
Detailed explanation2: Answer and Explanation: A doublestranded DNA molecule with 20% thymine would contain 30% guanine.
Detailed explanation3: Updated On: 27062022 Thus, If a double stranded DNA has 20% of cytosine, it has 20% of guanine. Thus, cytosine plus guanine make 40% of the total bases. The remaining 60% includes both adenine and thymine which are in equal amounts. Therefore, the percent of adenine is 30%.
Detailed explanation4: Answer and Explanation: If a cell contains 20% guanine, it will contain 30% adenine. According to Chargaff’s rules, %G = %C and %A = %T. The bases G and C are complementary and are always equal in amount in doublestranded DNA.
Detailed explanation5: If 20% of the DNA in a guinea pig cell is adenine, what percentage is cytosine? Explain your answer. If 20% is adenine, then 20% is thymine. The remaining 60% is composed of cytosine and guanine in equal percentages so that each makes up 30% of the DNA.