The unit of contraction that composes a muscle cell is called what?
a. troponin components
b. myofilaments
c. sarcomere
d. sarcoplasmic reticulum
c. sarcomere
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When we say that DNA replication is semiconservative, we mean that:
A. only half of an organism's DNA is replicated during each cell division. B. when DNA is replicated, each new double helix contains one parental strand and one newly synthesized daughter strand. C. when DNA is replicated, one double helix contains both parental strands and one contains two newly synthesized daughter strands. D. parental DNA stays in the parent cell and daughter DNA ends up in the daughter cell. E. None of the answer options are correct.
Which of the following hormones is NOT produced by the adrenal gland?
A. epinephrine B. cortisol C. prolactin D. aldosterone E. norepinephrine
With metal pollutants, the best phytoremediation uses ____
a. hydrologic injections that dilute the groundwater b. chemical injections that degrade the pollutants c. plants that take up toxins and store them in aboveground tissues d. plants that prevent the toxins from being absorbed in their tissues e. plants that can breakdown the toxins and release them into the air
Which of the following is found in both Gram (+) and Gram (-) cell walls?
A. an outer membrane B. Peptidoglycan C. Lipopolysaccharide