Answer:
D. 3' hydroxyl group
Explanation:
The polymerization activity of DNA polymerases works in 5' to 3' direction only. This means that the DNA polymerase can add new deoxyribonucleotides to the free 3' end of the primer or existing DNA strands only. The 3' end of DNA has a free OH group that exhibits the nucleophile attack on the incoming nucleotide. The free phosphate group is present on the 5' end of a DNA strand. Therefore, DNA polymerase always adds new nucleotides to the 3' OH ends (OH= hydroxyl group).
Answer: A heterozygous genotype stands in contrast to a h o m ozygous genotype meaning that there are different portions where the sequence is different.
The amino acids componets are residues containing nucleophilic side chains such as hydroxyl or sulphdryl groups such as amino acids serine, cysteine, theonine, or tyrosine. First, irreversible inhibitors form a reversible non-covalent complex with the enzyme(EI or ESI)