Which of the following is/are TRUE regarding serotonin?

a. serotonin is synthesized from tryptophan
b. serotonin is a peptide
c. serotonin regulates anxiety and aggression
d. serotonin is a neurotransmitter
e. a, c, and d


Answer: e. a, c, and d

Biology & Microbiology

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Which section of the pre-mRNA contains the protein-coding regions?

A. introns B. exons C. The entire pre-mRNA contains protein-coding regions. D. The pre-mRNA does not code for proteins at all.

Biology & Microbiology

Which of the following is endemic in wild rodent populations of the western United States?

A. pneumonia B. diphtheria C. tuberculosis D. anthrax E. plague

Biology & Microbiology

Examine the phylogenetic tree depicted in Figure 26.17 as you address the following questions. Extremophiles live in environments with high temperature, low pH, or high salt conditions;

however, hyperthermophiles, acidophiles, and halophiles can also thrive in less extreme environments. A. true B. false

Biology & Microbiology

To study the genome of the loblolly pine, Pinus taeda, researchers obtained DNA from ____ cells, thereby halving the

amount of DNA for initial sequencing.

a. haploid b. diploid

c. triploid d. polyploid e. hexaploid

Biology & Microbiology