A protein that speeds up chemical reactions without being consumed in the process is called a(n) ________
Fill in the blank(s) with correct word
enzyme
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What is the fate of the two-celled pollen that
germinates on a receptive stigma?
a. one cell becomes a pollen tube; the other cell becomes two sperm cells b. one cell becomes a pollen tube; the other cell becomes a single sperm cell c. one cell dies and the other becomes a sperm cell d. both cells undergo mitosis to form four sperm cells e. both cells become sperm cells
The reactants of the Calvin cycle are:a
H2O, ATP, and NADPH. b. CO2, ADP, and NADP+. c. CO2, ATP, and NADPH. d. H2O, ATP, and NADPH. e. CO2, H2O, and ATP.
Suppose that in the use of polynucleotide phosphorylase, nucleotides A and C are added in a ratio of 1A:5C. What is the probability that an AAA sequence will occur?
What will be an ideal response?
The brain can infer the pitch of a sound from the:a
number of hair cells that are stimulated. b. particular hair cells that are stimulated. c. intensity with which the hair cells are stimulated. d. intensity of the action potential produced by the stimulated hair cells. e. fluid movements of the semicircular canals