All known organisms appear to translate genetic information to protein molecules via the same genetic code. This finding strongly supports the hypothesis that __________.
a. all organisms are descended from a single common ancestor
b. there's only one possible way to encode information in a macromolecule
c. the genetic code is of relatively recent evolutionary origin
d. scientists have yet to accurately decipher the genetic code
e. None of the listed responses are correct.
Answer: a. all organisms are descended from a single common ancestor
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What important metabolic intermediate does not cross the inner membrane of the mitochondria?
A. ATP B. Acetyl-CoA C. Pyruvate D. Oxygen
After ingestion of a food particle, pH changes and enzymes contributed by the ________ will digest and hydrolyze the ingested particle in the phagocytic vacuole.
A. mitochondria B. endoplasmic reticulum C. lysosome D. plasma membrane
Which of the following is NOT a function of slimy mucilage in microbes?
A. protects against the host's immune system B. binds nutrients C. serves as a flotation device D. prevents desiccation (drying out) E. protects against ultraviolet radiation
The type strain is a well-characterized strain to which other strains are compared for inclusion in or exclusion from a particular species.
Answer the following statement true (T) or false (F)