The outer mitochondrial membrane contains
a. a lower concentration of proteins than the inner membrane.
b. an active transporter for pyruvate.
c. proton transporters.
d. an active transporter for ATP
Ans: a. a lower concentration of proteins than the inner membrane.
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Which of the following is not a reason why gene regulation in prokaryotes is simpler than in eukaryotes?
A. Prokaryotic DNA is not packaged in chromosomes. B. Prokaryotic DNA is not sequestered in the nucleus. C. Processing of mRNA does not occur in prokaryotes. D. Prokaryotic mRNA travels rapidly from the nucleus. E. Transcription and translation are not separate processes in prokaryotes.
In the vertebrate kidney, reabsorption and secretion take place in the renal tubules; after that, the filtrate enters the collecting ducts as ____
Fill in the blank with the appropriate word.
Which of the following forms of contraception is removable?
A. An intrauterine device B. A tubal ligation C. A vasectomy D. None of these
During the cardiac cycle, which of the
following is the correct order of events?
a. atria contract, atria and ventricles relax, ventricles contract b. ventricles contract, atria contract, atria and ventricles relax c. atria and ventricles relax, atria contract, ventricles contract d. ventricles contract, atria and ventricles relax, atria contract e. none of these