In a sample of double-stranded DNA, if the nitrogenous base guanine is 19%, then the nitrogenous base adenine will be 31%
Explanation:
In a double-stranded DNA, the four nitrogenous bases bind and pair together. The purine bases guanine (G) and adenine (A) pair with pyramidine bases cytosine (C) and thymine (T) respectively. The pairing will be between G-C and A-T bases.
According to Chargaff’s Rule, the percentage of each nitrogenous base will be equal in a pair. So the percentage of G will be equal to percentage of C and the percentage of A will be equal to percentage of T.
So if the guanine percentage is 19%, then applying Chargaff’s rule, cytosine will also be 19%
The remaining 68% will be shared with the adenine and thymine pair, of which adenine will be of 31% according to Chargaff’s rule.
HCG is the hormone that pregnancy tests confirm.
Both C and B can be reasonable reasons why a *Relationship* isnt forming.
[BOTH BOYS ARE TOO BUSY]
When a person is too busy, the person may not try to get friends. They wouldn't be able to hang out together, thus making the relationship decrease.
[BOTH BOYS ARE NOT COMMUNICATING]
if you're not communicating to eachother you won't have the *best* relationship. Talking to eachother is the main part of being friends or even dating someone. Not talking to someone will make them feel as if the relationship/friendship isnt worth it and will end it off.
(INCORRECT ANSWERS)
[BOTH BOYS ARE ON A DIFFERENT TEAM]
They may be going against eachother, but that *won't* end a friendship. Sometimes it builds friendships up. Thus this amswer is incorrect.
[THE BOYS ARE NOT BEING GENEROUS WITH THEIR TIME AND EFFORT]
This won't really do *anything* to the relationship. It may, but C and D would have more effects on the friendship. If both boys have this, then they may even be able to become friends because of the similarity, thus making this answer *Incorrect*
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