What is the function of class 1 release factors?
a. They release deacylated tRNAs from the ribosome.
b. They release class 2 release factors from the ribosome.
c. They recognize termination codons and bind to the ribosomal A site.
d. They assist in ribosomal translocation.
e. They release amino acids from tRNAs.
Ans: c
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A) hydrogen sulfide (H2S) / gypsum (CaSO4) / elemental sulfur (So) B) hydrogen sulfide (H2S) / sulfate (SO42-) / elemental sulfur (So) C) sulfate (SO42-) / gypsum (CaSO4) / pyrite (FeS2) D) sulfate (SO42-) / sulfide (H2S) / elemental sulfur (So)
In a sunflower population, a mutation arises that results in vessels 4à— wider than wild-type. The mutants will have _________ water-transport capacity, but will also be more susceptible to _________
A. higher; cavitation from freezing B. higher; cavitation from air leaks C. higher; conduit collapse D. lower; cavitation from freezing
Which of the following is a type of ecdysozoan protostome?
a. Echinodermata b. Ctenophora c. Molluska d. Chordata e. Nematoda
What is the name for the ability of living things to maintain a relatively constant internal environment?
A) cellular respiration B) homeostasis C) metabolism D) stimulus-response