The enzymes responsible for adding nucleotides to the exposed dna bases during replication are
a. replicases
b. dna polymerases
c. helicases
d. template enzymes

regulation of gene expression. gene expression can be regulated by various cellular processes with the aim to control the amount and nature of the expressed genes. these regulatory proteins bind to dna and send signals that indirectly control the rate of gene expression

explanation:

i wish i could with all of them i can barley see the first one so here's the answer to the first one b

you know they are heterozygous for a trait because they have it as jj or jj.