Serotonin is mostly found in the digestive tract.
a. true
b. false
Answer: a. true
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Which enzyme is responsible for catalyzing the peptide bonds between amino acids in translation?
a. protein polymerase b. catalytic rRNA c. peptidyl transferase d. aminoacyl tRNA synthetase
The fluid mosaic model explains the function and components of which of the following?
a. Plasma membrane b. Endoplasmic reticulum c. Cytoskeleton d. Endomembrane system
The Golgi apparatus is not
A. involved with secretion of cellular substances. B. an organelle. C. studded with ribosomes. D. a processing center. E. a stack of membrane-enclosed sacs.
Analogous traits:
a. are shared by two or more species because some evolutionary process (usually natural selec-tion) has independently fashioned the similar traits in each species. b. are found in two or more species because those traits are from a common ancestor. c. Both of the above. d. Neither of the above.