Enzymes ____
a. change the rate of a reaction
b. change the direction of a reaction
c. change the free energy of a reaction
d. are used up in a reaction
e. are present in concentrations approaching their substrates' concentrations
ANSWER: a
You might also like to view...
Genes for drug resistance may be present
A. on plasmids. B. on the chromosome. C. on mitochondrial DNA. D. both on the chromosome and on plasmids. E. both on plasmids and on mitochondrial DNA. F. both on the chromosome and on mitochindrial DNA.
One of the more important genera of gram-positive aerobic actinomycetes found in soils is ________.
A. Bdellovibrio B. Pseudomonas C. Streptomyces D. Acinetobacter
A transmembrane protein has 1000 amino acids. The fifth amino acid is found on the external surface of the cell membrane. It interacts with the aqueous environment outside the cell
Amino acids 25 and 205 are covalently bonded to each other and are required to give the protein its three-dimensional shape. Amino acid 554 is found on the outer surface of the protein, but it is deep in the interior of the membrane. Amino acid 979 is found on the external surface of the protein, where it forms a weak ionic bond with a chloride ion. Can you identify each of the numbered amino acids by structural group and name? Please note that there may be more than one specific amino acid possible in some cases. Amino acids: 5 25 205 554 979 What will be an ideal response?
DNA analysis reveals that two species of birds appear to have evolved from a common ancestor. These two species belong to the same
A) nest group. B) species. C) gene pool. D) clade. E) breeding group.