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Various Chemistry Questions

Which of the following best describes the side chain of valine?
a. acidic
b. basic
c. non-polar
d. polar

Question 2
Which of the following amino acids has its isoelectric point at the lowest pH?
a. aspartic acid
b. glycine
c. arginine
d. methionine

Question 3
When a disulfide linkage is formed, the compound containing the linkage has been
a. oxidized
b. reduced
c. hydrolyzed
d. dehydrated

Question 4
How many different tripeptides could be made from serine, alanine, and glycine?
a. 2
b. 3
c. 4
d. 6

Question 5
The primary structure of a protein refers to
a. its amino acid sequence
b.orientation of alpha-helices
c.orientation of beta-pleated sheets
d.presence of disulfide bonds

Question six
Addition of alanine to water will produce
a. a neutral solution
b. a slightly basic solution
c. a slightly acid solution
d. cannot be predicted

Question 7 Multiple Choice 1 points
Which of the following fragments would NOT result when the decapeptide Asn-Gly-Lys-Phe-Pro-Arg-Gly-Leu-Lys-Ser is treated with trypsin?
a. Gly-Leu-Lys
b. Phe-Pro-Arg
c. Asn-Gly-Lys
d. Pro-Arg-Gly-Leu

Question 8
Which aldehyde would be used to prepare leucine using the Strecker synthesis?
a. butanal
b. 3-methylbutanal
c. 2-methylbutanal
d. 2-methylpropanal

Question 9
Amino acids have
a. high melting points and low water solubility
b.high melting points and large dipole moments
c.small dipole moments and low water solubility
d. large dipole moments and are hydrophobic

Question 10
The component of structure responsible for holding the 4 chains of hemoglobin together is
a. primary
b.secondary
c.tertiary
d.quarternary

Solution Preview

Question 1
Which of the following best describes the side chain of valine?
Valine's side chain is -CH(CH3)2. It is nonpolar.

Question 2
Which of the following amino acids has its isoelectric point at the lowest pH?
An isoelectric point is the pH at which the molecule is neutrally charged. Therefore, the acidic amino acid, aspartic acid would have a pI at a very low pH.

Question 3
When a disulfide linkage is formed, the compound containing the linkage has been
A disulfide bond forms when two -SH groups unit to form a -SS- bond. ...

Solution Summary

This Solution contains over 300 words to aid you in understanding the Solution to these questions.

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