With which of the following is a signal-recognition particle (SRP) capable of interacting?
A. an SRP receptor
B. a ribosome
C. a signal sequence in a protein destined for
Answer Key: A,B,C
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Detritivores _____
A) recycle chemical elements directly back to primary consumers B) synthesize organic molecules that are used by primary producers C) convert organic materials from all trophic levels to inorganic compounds usable by primary producers D) secrete enzymes that convert the organic molecules of detritus into carbon dioxide and water E) may be autotrophic or heterotrophic
What is the difference between food poisoning and food infection? Are antibiotics useful in either of them?
What will be an ideal response?
A graduate student is studying the distribution of auxin in roots and stems exposed to sunlight
He notices that more auxin collects in the sides of stems and roots that are not exposed to light; however, the effects of this distribution are very different. Why? Select all correct choices. A. Auxin prevents cell elongation in the shaded cells of stems. B. Auxin (via ethylene) promotes cell elongation in the shaded cells of roots. C. Auxin (via ethylene) prevents cell elongation in the shaded cells of roots. D. Auxin promotes cell elongation in the shaded cells of stems.
The serial endosymbiosis hypothesis states that the origin of mitochondria and chloroplasts was the result of a
mutually advantageous symbiotic relationship between two eukaryotic organisms. ______________c Indicate whether the statement is true or false.