An axillary bud may produce
A. a lateral branch or a flower.
B. inhibitors of growth.
C. nothing-it is shed with the leaf.
D. wood and lateral branches.
Answer: A
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The protons that make up the proton gradient used during the light reactions of photosynthesis come from:
-glucose. -ATP. -water. -NADPH.
The respiratory chain is relatively inaccessible in the experimental manipulation of intact mitochondria
After disrupting mitochondria with ultrasound, however, it is possible to isolate functional submitochondrial particles, which consist of broken cristae that have resealed inside-out into small, closed vesicles. In these vesicles, the components that originally faced the matrix are now exposed to the surrounding medium. A. How might such an arrangement aid in the study of electron transport and ATP synthesis? B. Consider an anaerobic preparation of such submitochondrial particles. If a small amount of oxygen is added, do you predict that the preparation will consume oxygen in respiration reactions? Will the medium outside the particles become more acidic or more basic? What, if anything, will change if the flow of protons through ATP synthase is blocked by an inhibitor? Explain your answer.
During an allergic reaction, IgE antibodies bind to ____
a. B cells b. T cells c. plasma cells d. mast cells e. neutrophils
The key feature of the action potential that prevents it traveling backwards towards the soma as well as forwards down the axon is
A. the activation state of the voltage-gated Na+ channel. B. the inactivation state of the voltage-gated Na+ channel. C. the activation state of the voltage-gated K+ channel. D. the inactivation state of the voltage-gated K+ channel. E. the temporary cessation in activity of the Na+/K+ pump.