The domain Archaea includes prokaryotes that are
A. endospore formers.
B. intracellular parasites.
C. members of the deeply branching bacteria.
D. human pathogens.
E. hyperthermophiles.
Answer: E
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Translation requires _____
A) mRNA, tRNA, DNA, and rRNA B) mRNA, DNA, and rRNA C) mRNA, tRNA, and rRNA D) mRNA, tRNA, and DNA
One reason that prokaryotic genes do not contain introns is that
A) the introns are cut out during binary fission. B) due to the short time the bacterium is around as a single organism, a 5' cap and poly (A) tail are added immediately for translation to take place. C) bacterial proteins are very short and not subject to mutation. D) translation sometimes begins before transcription has been completed because prokaryotes do not have a nucleus. E) integrated viral DNA is not recognized for transcription.
How do somatic neurons and autonomic neurons differ? (Check all that apply.)
_____ Somatic neurons innervate the body surface, while autonomic neurons innervate internal structures. _____ Somatic neurons control skeletal muscle, while autonomic neurons control smooth and cardiac muscle. _____ Somatic neurons control exocrine glands, while autonomic neurons do not. _____ Somatic neurons control their effectors directly, while autonomic neurons use a series of neurons. _____ Somatic neurons are always excitatory, while autonomic neurons may be either excitatory or inhibitory.
Foreign material such as bacteria and other microorganisms are engulfed and destroyed by:
A) basophils. B) phagocytes. C) eosinophils. D) lymphocytes.