Which of the following is a biological catalyst?

a). rna
b). enzymes
c). antibody
d). steroid

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 think that is new experiments yield untrustworthy data and should be carefully considered, because you don't know what will happen with the experiments.

instead of copying and pasting things off of tests or work done on computer which im sure you did, try and read over the question carefully