Transfer RNA (tRNA) molecules are called "connectors" because they bind
A. promoters at one end and terminators at the other end.
B. promoters at one end and amino acids at the other end.
C. DNA at one end and mRNA codons at the other end.
D. codons of mRNA at one end and amino acids at the other end.
E. amino acids at one end and DNA at the other end.
D. codons of mRNA at one end and amino acids at the other end.
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Based on the idea that fungi have pores between their cell walls, which allow cytoplasm to move from one end of the mycelium to the other, which of the following hypotheses is the most plausible?
A) If a single mycorrhizal fungus formed symbiotic associations with more than one tree, carbon could travel from one plant to another. B) Parasitic fungi steal nutrients from their hosts. C) Predatory fungi capture their prey by encircling them with hyphae, and the flowing of the cytoplasm through the pores helps the hyphae to move around the prey. D) Fungi function as part of the global carbon cycle not only by converting carbon from one form to another, but by physically moving it from one location to another.
In skeletal muscle contraction, which of the following must be moved to the grooves in the actin
double helix to uncover the crossbridge binding site?
a. troponin b. Ca2+ c. tropomyosin d. ATP e. acetylcholine
Four of the five effects listed below are caused by
abscisic acid. Select the exception. a. may be involved in the dropping of leaves and fruits b. promotes stomata closure c. promotes seed dormancy d. confers resistance to water stress e. stimulates cell elongation
Industrial fermentation and fermentation in food production
A) are both processes in which sugars are oxidized to alcohols or acids. B) are processes in which sugar or protein is oxidized to produce alcohols or acids. C) use entirely different microorganisms. D) use entirely different starting material. E) make use of the same microorganisms.