Question

Choose terms from the word bank below to answer the following questions:

            nitrogenous base                    5-carbon sugar                        phosphate group

            replication bubble                    origin of replication                  telomeres

a.) Two separate DNA strands are joined together by these molecules:

b.) Eukarotic chomosomes have this type of structure for replication:

c.) Bacterial chromosomes have this type of structure for replication:

d.) These regions of a chromosome contribute to aging/senescence:

Answer 1

a) Two separate DANA strands are joined together by Phosphate group that form phosphodiester bond between third and fifth carbon atom of adjacent sugar rings.

b) Eukaryotic chromosome have replication bubble for the initiation of replication.

c) Bacterial chromosome have origin of replication for the starting of replication.It is a particular sequence in the geometry where replication begins.

d) The region of chromosome contribute to ageing and senescence is the telomere. The enzyme telomerase is the enzyme which replicate the ends of the chromosome and this delays the process of aging