Small pieces of RNA that can regulate translation of mRNA are called
A) microRNA.
B) ribosomal RNA.
C) transfer RNA.
D) messenger RNA.
Answer: A
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Point mutations in the DNA sequence don't cause:
A. silent mutations. B. missense mutations. C. nonsense mutations. D. frameshift mutations. E. transversion mutations.
Which of the following is a byproduct of the hydrolysis of water in a light-dependent reaction?
a. Carbon dioxide b. Carbon c. Carbon monoxide d. Oxygen
Based on the figure from the section on HIV replication, why could researchers use PCR to amplify viral DNA from the chimp Marilyn's tissues?
A. PCR can amplify any genetic material.
B. HIV uses DNA as its genetic material.
C. PCR uses a reverse transcriptase and can thus detect RNA.
D. HIV is converted to DNA and integrated into a cell's chromosome.
E. Some of the HIV will be stuck to the outside of a cell.
Four of the following explain the area effect on island diversity. Which one is the exception?
A. Larger islands have more habitats. B. Smaller islands have more varied and higher elevations. C. Larger islands intercept more colonizers. D. Smaller islands have less complex topography. E. Smaller islands have a greater probability of a species becoming extinct.