The electron transfer chain is located ____
a. on the inner membrane of the mitochondria
b. on the inner membrane of the chloroplasts
c. in the fluid part of the chloroplast
d. throughout the cytoplasm of the cell
e. on the plasma membrane of eukaryotes
ANSWER: a
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The initial amino acid incorporated into a nascent peptide is N-formylated in
A) eukaryotic translation. B) prokaryotic transcription. C) prokaryotic translation. D) both choices A and C E) both choices B and C
Which of the following statements about the polymerization of macromolecules is false?
A) Often the energy needed for polymerization is supplied by ATP. B) The polymer chain usually has two different ends. C) Water is added to join the monomers of the macromolecules. D) A monomer is usually activated by the coupling of the monomer to a carrier. E) Macromolecules are synthesized by the stepwise addition of monomers.
All of the following functions are performed by plant vacuoles EXCEPT:a
maintaining hydrostatic (turgor) pressure. b. waste storage and recycling. c. storage of proteins. d. breakdown of unneeded cellular materials. e. storage of nucleic acids.
Which of the following is absolutely necessary for diffusion to occur?
a. a phospholipid bilayer b. a living cell c. a selectively permeable membrane d. a concentration gradient