Proteins Quiz_202 - From null <Saved by Internet Explorer...

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Date: Wed, 16 Sep 2015 09 52 41 -0500
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Subject:Proteins Quiz
Proteins Quiz
Attempt 2 of 2
08/30/2015 8:21 PM EDT
08/30/2015 8:26 PM EDT
90%
90 out of 100
Question 1
The amino acid valine is shown with its sidechain atoms highlighted in yellow.
Do you think this amino acid is hydrophilic or hydrophobic?
A. hydrophobic (non-polar)
B. hydrophilic (polar)
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Correct! There are no oxygen atoms here, so the side chain does NOT look like
water. Therefore, it probably does not interact well with water!
Question 2
This amino acid is ______________.
A. hydrophobic
B. hydrophilic
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Points: 10 out of 10
Points: 10 out of 10
Points: 0 out of 10
Correct. The oxygens on the side chain make this a hydrophilic amino acid.
Question 3
The peptide bond that forms between two amino acids is an example of a(n):
A. covalent bond
B. hydrogen bond
C. ionic bond
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Correct, because there is sharing of electron between the carboxylic carbon on
one amino acid and the amino nitrogen on the next amino acid.