OBJECTIVE LIFE SCIENCE
MOLECULAR BIOLOGY
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
uracil
|
|
|
cytosine
|
|
|
guanine
|
|
|
thymine
|
Detailed explanation-1: -Answer and Explanation: An unmutated segment of DNA that contains 40 molecules of adenine, will contain an equal number of thymine as well. This is due to adenine always bonding with thymine in DNA.
Detailed explanation-2: -1) In a DNA molecule, Adenine (A) pairs with Thymine (T), and Guanine (G) pairs with Cytosine (C). Since the DNA sample contains 40% Adenine, it must also contain 40% Thymine to maintain the base pairing rule. This means that A + T = 80%.
Detailed explanation-3: -Answer: There would be 20% Cytosine.
Detailed explanation-4: -If 10% of the bases in a DNA are adenine, 10% of this DNA molecule must be thymine. The remaining 80% will be made up of 40% cytosine and 40% guanine since the bases pair with each other leaving a ratio of 1:4.