Enzymes a) are not required to sustain the life of an organism b) act as catalysts in chemical reactions of cells c) interact with specific substrates like a lock and key d) can lower the required activation energy for reactions in living organisms

Consider the last statement in the prompt: "people take such environmental factors into account in their choices when deciding where to live." do all people have a choice as to where they live? what factor plays a key role in this decision and may therefore play a large role in determining quality of life?

What are two reasons for why a species might disappear from the fossil record?

Dna has unique properties that allow it to accurately retain genetic information, even after multiple rounds of replication. one aspect of dna that allows it to accurately store genetic information is the base pairing from chargaff\'s first rule of the four nucleotide bases. if the c content of a dna molecule is 22%, what are the percentages of the remaining bases?