The molecule acetyl CoA is completely broken down into carbon dioxide, hydrogen ions, and electrons in which one of the following processes?
A) glycolysis
B) action of the sodium-potassium pump
C) the electron transport system
D) exocytosis
E) the citric acid cycle
E
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A plant is treated with a chemical that blocks the flow of electrons between photosystem II and photosystem I, such that protons are not transported from the stroma into the thylakoid compartment. What is the effect of this chemical on photosynthesis?
A. the increased number of protons will be directly used in the thylakoid to produce glucose B. an increased proton gradient will provide the energy needed to produce ATP from the light reactions C. a decreased proton gradient will cause less ATP to be produced from the light reactions D. the increased proton gradient will be used to make NADPH for the Calvin cycle Clarify Question What is the key concept addressed by the question? What type of thinking is required? Gather Content What do you already know about photo systems II and I and electron transport? What other information is related to the question? Choose Answer Do you have the necessary information to solve the problem? Reflect on Process Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
Where are the introns removed from during MRNA post-transcriptional editing?
a. in the cytoplasm b. in the endoplasmic reticulum c. in the nucleus d. They are not removed.
The most oxygenated blood is indicated by the letter ____
a. A b. B c. C d. D e. E
What is the name for the study of the geographic distribution of species?
A) Biogeography B) Ecology C) Systematics D) Taxonomy