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Question 1

Which statement best distinguishes plants and animals as they relate to amino acids?

Revolt · Accepted Answer

Plants can synthesize all twenty amino acids. Humans must eat plants or animals to obtain some of these amino acids.

Question 2

How many amino acids are found in living organisms?

Revolt · Accepted Answer

20

Question 3

DNA and RNA share a number of similarities, but they also differ in certain aspects of their structure. Which nitrogenous base is found in RNA but is not found in DNA?

Revolt · Accepted Answer

uracil

Question 4

Which element is found in nucleic acids but not in amino acids?

Revolt · Accepted Answer

phosphorus

Question 5

Which component makes each amino acid unique?

Revolt · Accepted Answer

R group

Question 6

How many amino acids must be obtained in the diet because they cannot be made by the body?

Revolt · Accepted Answer

10

Question 7

Which pair of statements best describes an essential amino acid?

Revolt · Accepted Answer

It is an amino acid that cannot be made by the body. It must be obtained from eating certain foods.

Question 8

Which three components are common to all amino acids?

Revolt · Accepted Answer

an amino group, a carboxyl group, and an R group

Question 9

Who discovered the monomers of nucleic acids?

Revolt · Accepted Answer

Phoebus Levene

Question 10

Who first identified nucleic acids, and where were they discovered?

Revolt · Accepted Answer

Friedrich Meischer discovered nucleic acids in blood cells.

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