Pheromones are a type of ________ signal
a. mechanical
b. chemical
c. tactile
d. auditory
e. physical
b
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The classical neurotransmitters do NOT include
a. acetylcholine. b. amino acids. c. neuropeptides. d. monoamines.
How are viruses such as HIV similar to living things? How are they different?
What will be an ideal response?
Which of the following is the MOST accurate description of Endotoxins?
A. They are lipopolysaccharides located in the outer membrane of gram-positive bacteria only B. They are lipopolysaccharides located in the outer membrane of gram-negative bacteria only C. Highly antigenic, induce antitoxins, and do form toxoids D. Many have A-B subunit structure in which A subunit is the active one and the B unit is the one that binds into the cell E. They are polypeptides secreted by certain bacteria that alter cell functions resulting in symptoms of disease
Chromatosomes are
a. chromosomal regions that have at least one transcriptionally active gene. b. nucleosomes that contain linker histones. c. fibers consisting of two coiled rows of nucleosome strings. d. an octet of core histones. e. strings of nucleosomes.