Solved by a verified expert:3. The R-groups in the active site of an enzymeA. Will not directly participate in the reaction catalyzed by the protein.B. Will have the highest affinity for the products of the reaction.C. Can be transiently altered during catalysis.D. Are rare. Normally there are no R-groups in the active site.and21. A diploid cell (for which n=3) is in G1. How many chromosomes and chromatids are in the cell?A. 3 chromosomes, 3 chromatids.B. 3 chromosomes, 6 chromatids.C. 9 chromosomes, 18 chromatids.D. 6 chromosomes, 6 chromatids.E. 6 chromosomes, 12 chromatids.