Photosystem I and photosystem II are, respectively, part of
A. the carbon reactions only.
B. the carbon reaction and the light reactions.
C. respiration.
D. the light reactions and the carbon reactions.
E. the light reactions only.
E. the light reactions only.
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Hershey and Chase performed an experiment in which they used radioactive isotopes of phosphorus and sulfur to label different components of bacterial viruses. Their results clearly showed that
a. DNA was entering into the infected bacteria. b. the viruses did not contain protein. c. the viruses did not contain DNA. d. protein was entering into the infected bacteria. e. genetic material normally contains radioactive isotopes.
Sickle-cell anemia is caused by ____
a. an RNA error b. expansion mutation c. deletion mutation d. fragile X syndrome e. a base-pair substitution mutation
After cell division, some cells become differentiated. This means that they
A. become different shapes. B. become different sizes. C. perform different functions. D. become different in all these ways.
The function of translation is to assemble _____ into _____.
A) amino acids, a polypeptide chain B) proteins, amino acids C) codons, an mRNA transcript D) anticodons, tRNA