Lipids _____

A) are insoluble in water
B) are made from glycerol, fatty acids, and nitrogen
C) contain less energy than proteins and carbohydrates
D) are made by dehydration reactions
E) contain sulfur polymers


Answer: A

Biology & Microbiology

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The primary function of erythrocytes is to participate in immune reactions

Indicate whether the statement is true or false.

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The molecule of heredity is usually

A) RNA. B) DNA. C) protein. D) carbohydrate. E) None of the choices is correct.

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Plant cells have a ______ cell wall, with _____ as its main component.

Fill in the blank(s) with the appropriate word(s).

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Referring to the illustration, what activates the cyclin/Cdk complex?


a. binding between them
b. target protein
c. kinase
d. cyclin/Cdk is not activated

Biology & Microbiology