GENETICS AND EVOLUTION
MOLECULAR BASIS OF INHERITANCE
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
60
|
|
|
120
|
|
|
240
|
|
|
480
|
Detailed explanation-1: -According to Chargaff’s rules, the amount of adenine is always equal to that of thymine, and the amount of guanine is always equal to that of cytosine i.e A = T = 120 and G = C = 120, therefore, the total no. of nucleotides would be 120×4=480.
Detailed explanation-2: -Thus, the total number of nucleotides in DNA is 480. Q. Q.
Detailed explanation-3: -How many nucleotides are present in the segment if DNA segment contains 100 Adenine and 100 cytosines ? d) 500. Ans. The correct option is ‘c’ 400.
Detailed explanation-4: -A segment of DNA has 100 adenine and 150 cytosine bases.
Detailed explanation-5: -So, there are a total of 25+25=50 adenine and thymine bases in total. That leaves 100−50=50 remaining bases.