What is the function of DNA ligase in the gene cloning process?

Which of the following is true of cDNA produced using human brain tissue as the starting material?

a. The procedure to make it requires amplification by the polymerase chain reaction.

b. It is produced from pre-mRNA using reverse transcriptase.

c. It can be labeled and used as a probe to detect genes expressed in the brain.

d. It includes the introns of the pre-mRNA.

Which of the following is not true of cDNA produced using human brain tissue as the starting material?

a. It can be amplified by the polymerase chain reaction.

b. It was produced from pre-mRNA using reverse transcriptase.

c. It can be labeled and used as a probe to detect genes expressed in the brain.

d. It lacks the introns of the pre-mRNA.

Small accessory rings of DNA that replicate independently of an organism's genome are called _____.

In DNA technology, the term 'vector' can refer to:

What is recombinant DNA made of?