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Exam 18: Synthetic and Biological Polymers

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Question 1

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DNA molecules, as found in human cells, are best described as:

A) a large, single-stranded molecule made of proteins.
B) a large, single-stranded molecule that contains phosphate groups, carbohydrate units, and bases from amino acids.
C) a polysaccharide.
D) a large, double-stranded molecule made of amino acids.

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Question 2

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Draw the repeating, monomeric unit of Kevlar, a polyamide made from terephthalic acid and 1,4-diaminobenzene. These compounds are pictured below:

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Question 3

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What is the biomolecule found in the shell of a virus?

Assume the following three-base code system is true: Construct the amino acid sequence coded by the following piece of a DNA molecule: A T A T T A G A C G C C C C T G T A T T A

What two functional groups are found at the ends of any protein structure?

What is the repeating monomer found in cellulose?

Write the three-letter, abbreviated amino acid sequence of this polypeptide (review the figure in the text that shows the structures of the various amino acid residues while doing this exercise):

Teflon is synthesized with a monomer containing carbons and chlorines.

Which of the following statements about a DNA molecule is incorrect?

Which of the following may be classified as a natural biopolymer?

Only 10 different amino acids are needed to build every type of protein molecule found in humans.

Match the plastic in the questons with the monomer in the list below.

DNA molecules contain "codes," from which proteins and other materials can eventually be synthesized.

Which of the following does not appear in a DNA strand?

According to the text, the number of amino acids that a human body cannot synthesize is ________.

Which of the following nucleic acids is not found in DNA?

The monomer of PVC is ________.

Contrast the terms "monomer" and "monosaccharide." What types of materials are usually constructed from monomers? What types of materials are usually made from monosaccharides?

Properly connect three monomeric acrylonitrile units (the structure of acrylonitrile is provided below)to make a short segment of the polymer polyacrylonitrile.

Cellulose and starch are both polysaccharides of glucose. Explain why humans can consume and digest starch but not cellulose.