The genetic makeup of an organism is its
(a) phenotype.
(b) genotype.
(c) locus.
(d) gamete.
(b) genotype.
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The most common agent(s) causing subacute bacterial endocarditis is/are
A. Streptococcus pyogenes. B. Pseudomonas aeruginosa. C. normal skin or mouth microbiota. D. Escherichia coli.
How is the central portion of a T cell receptor complex functionally analogous to the center of the B cell receptor complex?
A. It has two pieces (chains), just like a B-cell receptor. B. Both receptors bind epitopes (small amino acid sections of antigen molecules). C. Both bind structures directly on the surface of microbes. D. Both can be secreted from lymphocytes to bind to pathogens under certain situations.
Grana are
a. the same as starch grains. b. the site of ATP production within chloroplasts. c. part of the outer chloroplast membrane. d. contained within mitochondria and nuclei.
How do the muscles in your arm extend your arm outward?
A) The muscles in your arm push on the bones, causing your arm to extend. B) The muscles in your arm relax, and the tendons pull the arm straight. C) Some muscles in your arm relax, and others contract, pulling the arm straight. D) The top half of your bicep wraps around underneath the elbow like a rope over a pulley. When it contracts, the arm is pulled out straight.