The unique chemical qualities of individual amino acids do not directly determine the function of an enzyme. What, then, is the role of the individual amino acid's unique chemical qualities, and what directly determines the function of an enzyme?
What will be an ideal response?
The side groups of an amino acid are what give the amino acid its unique chemical qualities. These allow specific amino acids in the polypeptide chain to bind to other specific amino acids, which fold and twist the polypeptide into a three-dimensional shape. The shape may include an indentation called the "active site" that directly functions as the binding site for the substrate. Active sites often include cofactors and coenzymes that improve its functionality.
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One unique feature of fertilization in flowering plants compared with animals is that _____
A) only plant sperm are motile B) fertilization in flowering plants involves double fertilization C) fertilization in flowering plants does not involve nuclear fusion D) in flowering plants the gametes are diploid, not haploid as they are in animals
Rickettsia species are unable to use glucose as a carbon and energy source, but can use glutamate or succinate.
Answer the following statement true (T) or false (F)
Directional selection favors ____
a. intermediate phenotypes b. phenotypes at one end of the distribution c. phenotypic extremes at both ends
d. heterozygous individuals e. homozygous individuals
An RNA molecule that can catalyze chemical reactions is called a_____.
A) stem-loop B) ribozyme C) protein D) Tetrahymena