During chemiosmosis,
A) energy is released as H+ ions move freely across mitochondrial membranes.
B) ATP is synthesized when H+ ions move through a channel in ATP synthase.
C) a concentration gradient is generated when large numbers of H+ ions are passively transported from the matrix of the mitochondrion to the mitochondrion's intermembrane space.
D) H+ ions serve as the final electron acceptor.
Answer: B
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Normal fruit flies have red eyes. Flies with mutations that block the function of the X-linked white gene have white eyes. The wild-type allele is completely dominant to mutant alleles. A white-eyed female fruit fly is mated to a red-eyed male. One of their hundreds of female progeny is white-eyed. This white-eyed daughter likely arose from nondisjunction of the sex chromosomes during ________ in the ________.
A) meiosis I; mother B) meiosis II; mother C) meiosis I; father D) meiosis II; father E) meiosis I or II; mother
What evidence was used to determine that the
last universal common ancestor of all life lived about 4.3 million years ago?
a. fossils of prokaryotic cells b. genome comparisons between all living things c. life found in meteorites d. fossil cladistic analysis e. more than one of these
Protease inhibitors:a
inhibit the action of reverse transcriptase. b. are glycoproteins found in saliva. c. result in viral copies that cannot infect new cells. d. can cure AIDS patients. e. destroy helper T cells.
Select the best response to the question. ?You are preparing a hospitalized patient for discharge home. What are the important instructions to include in your discharge medication teaching?
A) To take the prescribed antibiotic only as long as symptoms are present to decrease the risk of antibiotic resistance. B) To vary the administration times of the antibiotic according to the severity of symptoms. C) To continue the antibiotic only if the patient's fever returns. D) To take all of the prescribed antibiotics to decrease the risk of antibiotic resistance and disease recurrence.