The bacterial flagellum has three components. In order from the cytoplasm to the external environment, they are ________.
A. basal body, hook, and filament
B. basal body, filament, and hook
C. filament, hook, and basal body
D. filament, basal body, and hook
E. hook, basal body, and filament
Answer: A
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a. made of two polynucleotide strands b. ribosomal subunits c. mRNA templates that are transcribed into tRNA d. post-translational templates of tRNA e. triplets of nucleotides in mRNA
If a gene for a trait is monomorphic in a population and two random individuals mate, what would be the most likely phenotypic ratio for that trait in the offspring?
A) 2:1 B) 1 C) 3:1 D) More information is needed
Allergies run in families because
A. immunoglobulins pass from mother to fetus. B. immunoglobulins pass through breast milk. C. the relative production of IgE is inherited. D. the variable region of antibodies is genetically determined.
A species of the genus Streptococcus is the leading cause of
A. tuberculosis. B. urinary tract infections. C. contaminated milk and meat. D. "flesh-eating" bacterial infections. E. food poisoning from rice.