Hemoglobin transports oxygen in the blood and consists of a chain of 146 amino acids. How many different types of amino acids are used to construct proteins?

A. 146
B. 2
C. 20
D. 200


Answer: C

Biology & Microbiology

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Biology & Microbiology

The wild-type allele of a gene is:

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A population of squirrels is in a phase of exponential growth. Which events would act to slow this growth? (Check all that apply)  

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Biology & Microbiology

Contrast the following terms: monophyletic, paraphyletic, and polyphyletic. Provide one example for each. What will be an ideal response?

Biology & Microbiology