The role of tropomyosin in skeletal muscle is ________
A) blocking the active sites on the actin to regulate muscle contraction
B) the contracting unit
C) blocking the active sites on myosin to regulate muscle contraction
D) containing neurotransmitters
A
Explanation:
B) Tropomyosin is not the contracting unit of skeletal muscle.
C) Tropomyosin does not block the active sites on myosin.
D) Tropomyosin does not contain neurotransmitters.
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Fill in the blank(s) with correct word
The most likely outcome of nondisjunction is the production of a gamete receiving ________.
A. 22 chromosomes B. 44 chromosomes C. no chromosomes D. 23 chromosomes E. 46 chromosomes
The ________ foramen between the temporal and occipital bones provides a passageway for three cranial nerves and drainage of blood from the brain.
Fill in the blank(s) with the appropriate word(s).
Proteins that are embedded within, and extend across, the phospholipid bilayer are called ________ proteins.
A. cytoskeleton B. integral C. catalytic D. peripheral