The T cell receptor is comprised of
A. a gamma protein chain.
B. a delta protein chain.
C. alpha and beta protein chains.
D. All of the choices are correct.
Answer: C
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The filamentous DNA phages are unusual, because they
A) are released from the host without the host being lysed. B) have linear genomes. C) replicate without a host. D) are released from the host without being lysed and have linear genomes.
Which of the following is a start codon that is responsible for specifying the amino acid methionine?
a. AUG b. AUA c. AGA d. AGU
Enzymes speed chemical reactions by
A. supplying energy to the reaction process. B. lowering the energy required to start a chemical reaction. C. lowering the amount of reactants that are needed. D. maintaining chemical equilibrium. E. raising the temperature of the surroundings.
A digestive system involving a tube-within-a-tube is characteristic of Cnidarians
____________________ Indicate whether the statement is true or false.