A new species of mouse is discovered that can sprint extraordinarily rapidly but also fatigues quickly. How would you expect its muscle composition to compare to that of an ordinary house mouse?

A. more slow oxidative fibers
B. more slow glycolytic fibers
C. more fast oxidative fibers
D. more fast glycolytic fibers
E. fewer fast glycolytic fibers


D. more fast glycolytic fibers

Biology & Microbiology

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Molecules such as H-H and O=O are held together by ____

a. polar covalent bonds b. van der Waals forces c. ionic bonds d. hydrogen bonds e. nonpolar covalent bonds

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What structure separates the inner and outer layers that form sponges?

a. spicules b. choanocyte c. osculum d. mesohyl

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Where is calcium stored in muscle fiber cells?

a. T-tubules b. sarcoplasmic reticulum c. muscle fibre cell membrane d. mitochondria e. sarcomeres

Biology & Microbiology

What is the smallest number of ultracentrifugation steps needed to separate nuclei from ribosomes in a cellular lysate?

a. Two b. One c. Four d. Seven

Biology & Microbiology