All of the following are functions of the citric acid cycle except
A) production of ATP.
B) production of NADH.
C) production of FADH2.
D) release of carbon dioxide.
E) adding electrons and protons to oxygen, forming water.
Ans: E) adding electrons and protons to oxygen, forming water.
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During meiosis I:
A. bivalents are formed during prophase I and are taken apart during anaphase I. B. chromosomes undergo reductional division. C. sister chromatids are not separated. D. nonsister chromatids exchange maternal and paternal DNA. E. All of these choices are correct.
Is antigenic shift alone likely to lead to influenza pandemics?
A. Yes-ONLY antigenic shift can lead to the large-scale mixing of gene elements required to produce a pandemic flu strain. B. No-ONLY antigenic DRIFT can lead to the large-scale mixing of gene elements required to produce a pandemic flu strain. C. Perhaps-but it would most likely be a mixture of antigenic shift AND drift that would result in a pandemic strain. D. No-antigenic SHIFT is responsible for changes in the hemagglutinin protein, while antigenic DRIFT is responsible for changes in the neuraminidase protein. You must have changes in both to lead to a pandemic strain.
You are looking at an unknown cell under a microscope that has 22 chromosomes plus 2 X chromosomes. Which of the following is the most likely identity of this cell?
A) a skin cell from a human female B) an egg from a human female C) an epithelial cell from a male chicken D) an eye cell from a female grasshopper
Chromatosomes are
a. chromosomal regions that have at least one transcriptionally active gene. b. nucleosomes that contain linker histones. c. fibers consisting of two coiled rows of nucleosome strings. d. an octet of core histones. e. strings of nucleosomes.