Question

question 6
why is it so important to be able to amplify dna fragments when studying genes?
a gene may represent only a very small portion of the cells dna.
a clone requires multiple copies of each gene per clone.
restriction enzymes cut dna into fragments that are too small.
dna fragments are too small to use individually.

Explanation:

Genes are a small part of the cell's DNA. Amplifying DNA fragments helps in studying genes as the amount of gene - specific DNA available initially is often very low. Cloning also requires multiple copies of genes. Restriction enzymes cutting DNA into small fragments and the small size of DNA fragments alone don't fully explain the importance of amplification as well as the fact that genes are a small part of total DNA.

Answer:

A. A gene may represent only a very small portion of the cell's DNA