Which of the following best describes a theory?
A. an experiment that is repeated over and over again
B. a tentative explanation of natural phenomena
C. a comprehensive explanation of natural phenomena supported by abundant evidence
D. a well-known fact
C. a comprehensive explanation of natural phenomena supported by abundant evidence
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Which are the products of the second part of glycolysis?
a. Two pyruvate molecules b. NADH only c. ATP and NADH d. ATP only
In an asexual life cycle, cells reproduce by
A. meiosis and fertilization. B. meiosis. C. All of the answer choices are correct. D. mitosis. E. fertilization.
For the study of a protein in detail, an effort is usually made to first:
A) conjugate the protein to a known molecule. B) determine its amino acid composition. C) determine its amino acid sequence. D) determine its molecular weight. E) purify the protein.
If a researcher used Escherichia coli DNA polymerase instead of Thermus aquaticus DNA polymerase in the PCR procedure, what would be the result?
A) DNA replication would occur more slowly than normal. B) DNA replication would not occur at all. C) Many mistakes would occur. D) DNA replication would occur twice as fast as normal. E) DNA replication would stop after one cycle.