Electron transport chain What is released at each step of an electron transport chain?
a) ultraviolet wavelengths
b) electrons
c) photons
d) energy
e) All answers are correct.
Answer: d) energy
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Which of the following relationships is INCORRECT?
A. maternal effect genes activate gap genes B. gap genes activate pair-rule genes C. pair-rule genes regulate segment polarity genes D. segment polarity genes regulate pair-rule genes E. maternal effect genes activate pair-rule genes
Most of the mRNA and protein molecules in the zygote are from the ____ because ____
a. mother; the fertilizing sperm contributes essentially no cytoplasm to the zygote b. mother; the fertilizing sperm contributes essentially no DNA to the zygote c. mother; the proteins in the egg degrade mRNA and protein molecules contained in the sperm d. father; the egg contributes essentially no cytoplasm to the zygote e. father; the egg contributes essentially no DNA to the zygote
Which of the following characteristics do SNPs have?
A) variable numbers of tandem repeats, highly uniform in the population B) small noteworthy transcribed regions, lethal genes C) various nucleotides transcribed repeatedly, homogeneous D) variable amino acid substitutions, highly heterogeneous E) variable base sequences, variable in the population
You are studying an enzyme-catalyzed reaction that induces a particular cellular activity in the lab. If you wanted to slow down that particular cellular activity by controlling the enzyme, what could you do?
A. increase the pH of the media the cells are growing in to the optimum pH B. decrease the temperature of the incubator where the cells are growing C. add an allosteric activator to the cells D. add cofactors to the media the cells are growing in