Mismatches caused by errors in DNA replication are corrected by a repair system that must discriminate between the template strand and the newly synthesized strand. How does E. coli discriminate between the template strand and the newly synthesized strand?

Which sentence best expresses the differing opinions of these two book reviews?

Which of the following matches the organisms described with the correct domain? a. bacteria--unicellular, eukaryotic organisms with cell walls that do not contain peptidoglycanb. archaea--multicellular, eukaryotic organisms that do not have cell wallsc. eukarya--single-celled and multicellular organisms, with a defined nucleus and a variety of nutritional sourcesd. bacteria--unicellular, eukaryotic organisms that always lack cell walls

All but one describes an effect of aging on the digestive system. a) decreased acid secretion b) decreased elasticity of stomach c) capacity to resist damage decreases d) food remains in stomach for less time