During reactions catalyzed by oxidoreductases an electron donor is
A. oxidized.
B. reduced.
C. synthesized.
D. degraded.
E. unaltered.
Answer: A
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The main difference between therapeutic cloning and reproductive cloning is that
A. in therapeutic cloning, embryonic stem cells are extracted from the blastocyst, while in reproductive cloning, the blastocyst is kept intact and implanted into a surrogate mother. B. somatic cell nuclear transfer is used for therapeutic cloning, while gametic cell nuclear transfer is used in reproductive cloning. C. unlike cells used for reproductive cloning, cells grown for therapeutic purposes do not display genetic imprinting problems. D. unlike cells used for reproductive cloning, cells grown for therapeutic purposes do not require the destruction of embryos.
56. In this diagram, the Y-axis of the graph shows values of "Incidence of Illness" in infants. The varying numbers of infants getting sick with rotavirus represents the
This figure shows graphed medical research results from a study on a new vaccine. The research was done in an effort to determine if a new vaccine would be effective in preventing potentially dangerous rotavirus infections in infants. Green data bars represent occurrence of infant cases that had normal rotavirus strains that aren't critically dangerous. Blue data bars represent occurrence of infant cases that had more dangerous rotavirus strains that can hospitalize or lead
A. normal infant baseline for reference to results from this medical study.
B. control group of infants in this medical study.
C. dependent variable of this medical study.
D. independent variable of this medical study.
E. standardized variable of this medical study.
Four of the following might be a response to rising body temperature. Which one is the exception?
A. Increased rate of breathing B. Decreased secretion of certain hormones C. More sweat D. Reduced blood flow to skin E. Increased rate of breathing
Which of the following most adequately describes how the Alu element may have proliferated to constitute 10% of the human genome?
A. Retrotransposons show self-proliferation. B. A single retrotransposon can be copied into many RNA transcripts. C. Retrotransposons increase with every generation. D. Multiple retrotransposons code the same gene. E. Retrotransposons increase with each cell division.