Evolution can only occur in a population when _____
a. mating is random
b. there is selection pressure
c. neither is necessary
B
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Which of the following statements is NOT true about sister chromatids?
A. They are identical DNA sequences. B. They are attached to each other at a region of their DNA sequence called the centromere. C. They are formed in the S phase of the cell cycle when the chromosome undergoes replication. D. They are formed when the prokaryotic circular chromosome attaches at the plasma membrane. E. All of these statements about sister chromatids are false.
Which of the following statements about genomic libraries and cDNA libraries is TRUE?
A. a cDNA library is derived from chromosomal DNA. B. a genomic library is derived from mRNA. C. a genomic library is made using reverse transcriptase. D. a genomic library is derived from mRNA and is made using reverse transcriptase. E. a cDNA library is derived from mRNA and is made using reverse transcriptase.
Mitochondria are responsible for generating _______ for the cell in the form of _______.
a. cytoplasm; ATP b. energy; glucose c. energy; ATP d. cytoplasm; glucose
A soup container was forgotten in the refrigerator and shows contamination. The contaminants are probably which of the following?
A. thermophiles B. acidophiles C. mesophiles D. psychrotrophs