Haustorial roots of dodders and other nonphotosynthetic, parasitic plants rob the host plant of ____
a. sugars only
b. minerals only
c. water only
d. sugars and minerals only
e. sugars, minerals, and water
ANSWER: e
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When tobacco plants are damaged by herbivorous caterpillars, they release chemicals called jasmonates into the air that ________
a. signal nearby plants to synthesize bitter alkaloids b. kill the caterpillars over a period of several hours c. attract parasitic wasps that lay eggs in caterpillars d. appear to cause a decrease in the appetite of the caterpillars
What specifically happens when the myosin
bound ATP is hydrolyzed to ADP and Pi?
a. the myosin converts to a high energy state b. the myosin converts to a low energy state c. the energy released from ATP causes the release of calcium from endoplasmic reticula d. myosin and actin form a cross-bridge e. the sarcomere contracts
All of the following are methods of avoiding host antibodies EXCEPT
A) antigenic changes. B) IgA proteases. C) invasins. D) membrane-disrupting toxins. E) inducing endocytosis.
What is different about the way that NADH and FADH2 donate electrons to the electron transport chain?
A. NADH is oxidized and FADH2 is reduced. B. NADH contributes its electrons to the first transmembrane complex in the electron transport chain and FADH2 contributes its electrons after the first transmembrane complex. C. More protons are transported into the intermembrane space of the mitochondria in response to one molecule of FADH2 as compared to the number of protons transported in response to one molecule of NADH. D. The electrons from NADH ultimately go on to reduce oxygen to generate water, whereas the electrons from FADH2 are used to reduce pyruvate to lactate.