The first site of protein digestion in the digestive system is
A. in the stomach.
B. in the small intestines.
C. the mouth.
D. the esophagus.
Answer: A
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Does ADP contain the capacity to provide energy for the cell?
A. No. ADP does not contain any bonds that can be broken to provide energy for the cell. B. Yes. ADP has the same capacity to provide energy for the cell as ATP. C. Yes. Cleaving the bond between the ribose sugar and the two phosphate groups can provide energy for the cell. D. Yes. Cleaving the bond between the terminal phosphate and the phosphate attached to the ribose sugar can provide energy for the cell.
In nerve impulse transmissions, the neuron sending the message across the synapse is called the
A. postsynaptic cell. B. Schwann cell. C. presynaptic cell. D. motor cell. E. receptor neuron.
Which of the following is a function of a poly-A signal sequence?
A. It is a sequence that codes for the hydrolysis of the RNA polymerase. B. It adds a 7-methylguanosine cap to the 3' end of the mRNA. C. It codes for a sequence in eukaryotic transcripts that signals enzymatic cleavage ~10-35 nucleotides away. D. It allows the 3' end of the mRNA to attach to the ribosome. E. It adds the poly-A tail to the 3' end of the mRNA.
The first group to exhibit an amniotic egg was the ____.
A. birds B. amphibians C. reptiles D. bony fish E. mammals