A single PR protein is composed of four identical polypeptide chains that act together to bind DNA. What is the highest level of protein structure that the PR proteins have?

A) primary
B) secondary
C) tertiary
D) quaternary


Answer: D

Biology & Microbiology

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In humans, hair texture is an incompletly

dominant trait. Curly hair is the homozygous dominant trait; smooth hair is homozgous recessive; wavy hair is heterozygous. If two wavy haired individuals have children what is the expected phenotype ratio?

a. 1:2:1 b. 3:1 c. 4:0 d. 1:1 e. 1:0

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In mammals, the binding of an antigen to a

cell’s receptors directly activates

a. complement proteins. b. adaptive immunity. c. PAMPs. d. genes on DNA. e. killer T cells

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The Army and the Environmental Protection Agency

are decreasing the contamination at the Army’s Aberdeen Proving Grounds by a. removing contaminated soil. b. planting hybrid poplar trees. c. chemically degrading the contaminants. d. covering the contaminated soil with a sealant. e. doing none of these.

Biology & Microbiology

In examining the career earnings of individuals with different levels of college/graduate attainment, identifying Bill Gates as an atypical instance amongst the population with less than a bachelor's degree, would be an example of what sort of data analysis?

A. Query B. Pattern discovery C. Outlier detection D. Data mining

Biology & Microbiology