What Blocks the Myosin-Binding Sites on Actin Thin Filaments in a Stimulated

question 59

Multiple Choice

What blocks the myosin-binding sites on actin thin filaments in a stimulated sarcomere?

• A)troponin
• B)myosin itself
• C)tropomyosin
• D)titin
• E)nothing

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Definitions:

Haploid Number

The number of chromosomes in a gamete of an organism, representing one complete set of chromosomes.

Chromosomes

Structures composed of DNA and proteins found in the nucleus of most living cells, carrying genetic information in the form of genes.

Prometaphase

Phase of cell division that occurs between prophase and metaphase and is characterized by attachment of the spindle fibers to the kinetochores of each sister chromatid.

Metaphase

A stage of mitosis in cell division where chromosomes line up in the middle of the cell before being separated into two new cells.