The final electron acceptor for cellular respiration

(A) Cytochrome
(B) FADH2
(C) NAD+
(D) NADP+
(E) Oxygen (O2)


Ans: (E) Oxygen (O2)

Biology & Microbiology

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What is the white matter of the spinal cord composed of?

a. glial cell bodies b. neuron cell bodies c. myelinated axons d. interneurons

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At night, assuming no artificial lights, primarily

a. Pr absorbs red light and is converted to Pfr. b. Pr absorbs far-red light and is converted to Pfr. c. Pfr absorbs red light and is converted to Pr. d. Pfr absorbs far-red light and is converted to Pr. e. Pfr is converted to Pr.

Biology & Microbiology

Photosynthetic organisms capture energy from sunlight and convert it into chemical bonds by forming

a. sugars. b. enzymes. c. work. d. substrates.

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Which of the following statements about open and closed circulatory systems is false?

A. Closed circulatory systems use muscular hearts to pump blood through blood vessels, whereas open circulatory systems lack any kind of muscular pump. B. Closed circulatory systems operate under higher pressure than open circulatory systems. C. Closed circulatory systems can more effectively control the flow of blood to specific body regions than open circulatory systems. D. Closed circulatory systems deliver materials at faster rates than open circulatory systems. E. Closed circulatory systems have higher resistance to flow than open circulatory systems.

Biology & Microbiology