The Power Stroke Describes The

question 143

Multiple Choice

The power stroke describes the:

• A)pivoting of the myosin head, which causes actin and myosin to slide relative to each other.
• B)binding of the myosin head to actin.
• C)cocking of the myosin head by hydrolysis of ATP.
• D)cycle of events involved in muscle contraction.
• E)All of these choices are correct.

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Definitions:

Mutations

Changes in the DNA sequence of an organism's genome, which can lead to diversity within species but also cause diseases.

DNA

Deoxyribonucleic acid, a molecule that carries the genetic instructions used in the growth, development, functioning, and reproduction of all known living organisms.

Atmospheric Oxygen

The oxygen gas (O2) present in the Earth's atmosphere, essential for the respiratory processes of most living organisms.

Photosynthesizing Bacteria

Microorganisms that convert light energy into chemical energy through the process of photosynthesis.