The structure enabling depolarization to travel deep into the muscle fiber is the ________.

A. motor unit
B. T tubule
C. sarcomere
D. sarcoplasmic reticulum


Answer: B

Biology & Microbiology

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________ alter repressor proteins thereby increasing the rate of transcription initiation.

A. Effectors B. Corepressors C. Inducers D. Modulators

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Anhidrotic ectodermal dysplasia is characterized by lack of normal ____________________ in the

skin. Fill in the blank(s) with the appropriate word(s).

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The graph in the accompanying figure represents the:a

electromagnetic spectrum b. action spectrum of photosynthesis c. process of cyclic electron transport d. process of noncyclic electron transport e. absorption spectra for chlorophylls a and b

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According to the fluid mosaic model of cell membranes, phospholipids _____

A) can move laterally along the plane of the membrane B) frequently flip-flop from one side of the membrane to the other C) occur in an uninterrupted bilayer, with membrane proteins restricted to the surface of the membrane D) have hydrophilic tails in the interior of the membrane

Biology & Microbiology