Luke sprained his ankle, tearing some of the collagen protein that forms his ligaments. Some types of collagen consist of three polypeptide chains twisted together to form a rope-like strand. What level of protein structure does this rope-like strand represent?

A. Primary
B. Secondary
C. Tertiary
D. Quaternary


D

Biology & Microbiology

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All land plants carry the LFY gene, which carries out similar functions in all plants

a. True b. False

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An example of a beneficial mutation is

A) a mutation in collagen that causes the skin to be extra stretchy. B) the mutation that causes sickle cell disease. C) a mutation in the CCR5 gene. D) a mutation in a cytokine gene that causes an allergy.

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Does increasing the predation rate increase or decrease the variation in the size of the prey population?

a. increase b. decrease c. no difference

Biology & Microbiology

An electrocardiogram (ECG, EKG) is a measure of the heart's:

a. electrical system. b. blood flow to the body. c. contraction rate. d. blood flow to heart muscle. e. pumping ability.

Biology & Microbiology