Answer the following considering Chargaff's rules. Suppose a 100-base-pair, double-stranded DNA molecule consists of 50% of guanine bases. How many total hydrogen bonds are holding the two strands together?

250 H bonds

Explanation:

The Chargaff rule states that a  DNA molecule has the following features-

1. Purine binds pyrimidines through hydrogen bond

2. The sum of purine and pyrimidine is equal to 1.

3. Adenine binds thymine always (involve two H bonds)

4. Guanine binds cytosine (involves three H bonds)

In the given question,

guanine bases- 50, therefore, cytosine bases will be 50  

H bond will be 50 x 3 = 150 bonds

Similarly,  

Adenine bases will be 50 equal thymine which will also be 50

double H bond will be - 50 x 2= 100  

Total H bond will be- 250 H bonds.

Thus, 250 H bonds are the correct answer.

the element that provides strength to the exoskeletons of clams and oysters is phosphorus. this is so because calcium carbonate is the main component in the shells.

explanation:

•there must be variation for the particular trait within a population.

•the variation must be inheritable (that is, it must be capable of being passed on from the parents to their offspring).

•individuals with one version of the trait must produce more offspring than those with a different version of the trait.good

explanation: