The controlled release of cellular material stored in membrane-bound vesicles to the outside of the cell is an example of:
A) exocytosis.
B) phagocytosis.
C) endocytosis.
D) transcytosis.
Ans: A) exocytosis.
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Which of the following correctly describes bases that pair with each other in the DNA double helix?
A. Adenine bonds with guanine. B. Guanine bonds with thymine. C. Thymine bonds with cytosine. D. Cytosine bonds with guanine E. Guanine bonds with thymine.
Transcription starts at a region of DNA called a(n)
a. sequencer. b. promoter. c. activator. d. terminator. e. transcriber.
What is contained in each of the two daughter cells that result from normal mitotic division of the original parent cell?
a. the same number of chromosomes and genes as the parent cell, and identical to those of the parent cell b. one-half the number of chromosomes as the parent cell, but different genes c. one-half of the number of chromosomes and genes as the parent cell, and identical to those of the parent cell d. the same number of chromosomes as the parent cell, but different genes
The stimulation of a motor neuron ultimately results in the release of a neurotransmitter at the synapse between the neuron and a muscle cell. How is the chemical signal converted into an electrical signal in the postsynaptic muscle cell?
What will be an ideal response?