A codon is ________.
A. the section of RNA that codes for a protein
B. the section of DNA that codes for a protein
C. three nucleotides of DNA that code for an amino acid
D. three nucleotides of RNA that code for an amino acid
Answer: D
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How are T7 genes transcribed?
A) Host RNA polymerase is modified to recognize the T7 promoter. B) Host RNA polymerase directly translates the T7 genes. C) T7 has its own RNA polymerase, which is packaged in its capsid and injected into the host during infection to transcribe T7 genes. D) T7 has its own RNA polymerase, which must first be synthesized by the host.
If goats are crossed with sheep, embryos will form but cease development and spontaneously abort. This is an example of
A. a prezygotic mechanism. B. hybrid inviability. C. hybrid sterility. D. hybrid breakdown. E. spermatic behavior.
A potential consequence of continued human population growth could be which of the following?
a. Humans change from exponential to logistic growth patterns. b. Carrying capacity of the planet will increase. c. Life expectancy decreases as resources become limited. d. Life expectancy increases as resource become more abundant.
Probability is calculated by dividing the number of one kind of possible outcome by the
A.) number of genes being considered. B.) total number of all possible outcomes. C.) number of other kinds of outcomes. D.) total number of offspring produced.