Question

The base-pairing rules for DNA state that ______.

a.T pairs with C, A pairs with G

b. any combination of bases is allowed

c.A pairs with T, C pairs with G

d. C pairs with A, T pairs with G

If a strand of DNA has the sequence CGGTATATC, then the complementary strand of DNA has the sequence _____.

a.ATTCGCGAT

b. GCCCGCGCT

c.GCCATATAG

d. TAACGCGCT

Mutation_____.

a.can produce new alleles

b. can be harmful, beneficial, or neutral

c.is a change in an organism’s DNA sequence

d. all of the above

In prokaryotes and eukaryotes, gene expression is most often controlled by regulation of _____.

a.the destruction of gene’s protein product

b. the length of time mRNA remains intact

c.transcription

d. translation

The DNA of eukaryotes is packed most loosely at which time?

a.During mitosis

b. During meiosis

c.During interphase

d. Both b and c

Answer 1

1. The base pairing rules for DNA state that A pairs with T and C pairs with G.

Adenine thymine,cytosine,guanine are the four nucleic bases of DNA.

In DNA adenine always pairs with thymine and cytosine always pairs with guanine.

So option ''C'' is the correct answer.

2. If a strand of DNA has the sequence CGGTATATC,then the complementary strand of DNA has the sequence GCCATATAG.

Adenine pairs with thymine and cytosine pairs with guanine.

So option ''C'' is the correct answer.

3. Third one answer is all of the above why because,

Mutation is a strong force for introducing new alleles.

It can be beneficial,harmful or neutral depending on their context or location.

Mutation is a change in DNA.It can cause changes in all aspects of its life.

So option ''D'' is the correct answer.