Which of the statements about enzymes are true? generally, an enzyme is specific for a particular substrate. for example, thrombin catalyzes the hydrolysis of the peptide bond between arg and gly. an enzyme yields a specific product, whereas a nonbiological catalyst may produce more than one product with the occurance of side reactions. catalysis occurs at the active site, which usually consists of a crevice on the surface of the enzyme. nonbiological catalysts and enzymes tend to have a similar degree of reaction specificity. a substrate must bind to the active site before catalysis can occur.

All the statements in this question are true, except that stating: "Nonbiological catalysts and enzymes tend to have a similar degree of reaction"

Explanation:

Enzymes are specific for a particular substrate.  Chemical catalysis is not as specific and can use several substrates and produce different products

answer: 21

step-by-step explanation:

divide 630 by 30. 30 goes into 630 21 times

step 1: initiation

initiation is the beginning of transcription. it occurs when the enzyme rna polymerase binds to a region of a gene called the promoter. this signals the dna to unwind so the enzyme can ‘‘read’’ the bases in one of the dna strands. the enzyme is now ready to make a strand of mrna with a complementary sequence of bases.

step 2: elongation

elongation is the addition of nucleotides to the mrna strand. rna polymerase reads the unwound dna strand and builds the mrna molecule, using complementary base pairs. there is a brief time during this process when the newly formed rna is bound to the unwound dna. during this process, an adenine (a) in the dna binds to an uracil (u) in the rna.

step 3: termination

termination is the ending of transcription, and occurs when rna polymerase crosses a stop (termination) sequence in the gene. the mrna strand is complete, and it detaches from dna.