Only Photosystem I is required for (anoxygenic/cyclic/noncyclic) photophosphorylation to occur
What will be an ideal response?
cyclic
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In the lup-dup sound of a beating heart, which
of the following make the first heart sound?
a. closing of the atrioventricular valves b. closing of the pulmonary valve c. closing of the aortic valve d. the contraction of the left ventricle e. the contraction of the right ventricle
Small changes in influenza surface antigens lead to
A. antigenic drift. B. antigenic shift. C. antigenic recombination. D. antigenic schism.
How does ATP provide energy to a cell?
A) It loses a phosphate group, releasing energy in the process. B) It releases electrons, which are a source of energy. C) It releases protons, which are used in the mitochondrion to create energy. D) It shuttles electrons across the mitochondrial membrane to create potential energy.
What organic molecules likely existed before the first cell?
A. nucleic acids B. lipids C. All answers are correct. D. proteins E. carbohydrates