Which of the following is not true of the enzyme–substrate interaction?
A) Many enzymes are extremely specific regarding a substrate.
B) Many enzymes cannot recognize a stereoisomer of their substrate.
C) Some enzymes accept any of a whole group of substrates.
D) Carboxypeptidase recognizes any of the amino acids from the carboxyl end of a polypeptide.
E) Cells are often able to carry out metabolic activity with only a handful of enzymes because many are nonspecific.
Answer: E
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Plant species are capable of attracting insects using chemicals. How can this aid in defense?
A. Some plant species attract pollinators. B. Some plant species attract insects that consume or parasitize herbivores. C. Some plants have inducible defenses that they produce only when herbivores are feeding on them. D. Some plants produce spines for defense. E. Some plant species are unable to defend themselves.
Which of the following describe sexual reproductive processes in fungi? Check all that apply.
_____ the release of conidia from the tips of hyphae _____ fusion of different, but compatible hyphal branches _____ fruiting bodies produce haploid spores _____ budding of a daughter cell
Nodules found on the roots of some plants are involved in supplying which element for the plant?
a. aluminum b. boron c. magnesium d. nitrogen e. chlorine
In the chemical shorthand 14C, the 14 represents the
number of a. excess neutrons. b. protons plus neutrons. c. electrons. d. protons plus electrons. e. radioactive particles.