Water is important to the interactions of biological molecules because it ____.
A. is a good buffer
B. destabilizes temperature
C. is a poor solvent for polar and ionic substances
D. has weak cohesive properties
E. promotes hydrophilic interactions
Answer: E
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Indicate the differences between DNA and RNA. (Select all that apply)
a. RNA is much smaller. DNA, by contrast, averages more than 100 million base pairs long. b. RNA contains a sugar called ribose whereas DNA contains a sugar called deoxyribose. c. RNA contains adenine, cytosine, thymine and guanine whereas DNA contains adenine, cytosine, thymine and uracil. d. RNA consists of only one nucleotide chain whereas DNA is a double helix.
What is the main reason that the alternative explanations to evolution are not considered scientific?
A. The scientific community is biased and will not look at any other explanation. B. The people suggesting the alternative explanations are not scientists. C. The alternative explanations are not testable by the scientific method. D. All of these are reasons why the alternative explanations are not considered scientific.
Energy released by the electron transport chain is used to pump H+ ions into which location?
A. cytosol B. mitochondrial matrix C. mitochondrial outer membrane D. mitochondrial inner membrane E. mitochondrial intermembrane space
A gene that produces a protein that influences the expression of other genes is specifically called a(n)
a. activator. b. structural gene. c. repressor. d. regulator gene. e. constitutive gene.