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Proteins Quiz
1. Roughly how many amino acids are present in a polypeptide?
a) 5-10
b) 10-100
c) 30-60
d) more than 80
2. A polypeptide is generally referred to as a protein if it has at least _____ amino acids in
its sequence.
a) 40
b) 60
c) 100
d) 150
3. The complete and overall three-dimensional structure of a protein is its _____ structure.
a) primary
b) secondary
c) tertiary
d) quaternary
4. The particular amino acid sequence of a protein is its _____ structure.
a) primary
b) secondary
c) tertiary
d) quaternary
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5. The specific interaction and orientation of the subunits of a large protein refer to its
_____ structure.
a) primary
b) secondary
c) tertiary
d) quaternary
6. A highly regular substructure of a protein is its _____ structure.
a) primary
b) secondary
c) tertiary
d) quaternary
7. Match the different levels of protein structure to the descriptions or examples.
a) primary
b) secondary
c) tertiary
d) quaternary
1. _____ alpha helix and beta sheet
2. _____ gly-ser-ala
3. _____ Hemoglobin consists of two α-subunits and two β-subunits.
4. _____ collection of alpha helices, beta sheets, and other areas of random structure
8. All proteins have a quaternary structure.
a) True
b) False
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9. Alternating rows of amino acids that line up in a side-by-side fashion describes a(n)
_____.
a) alpha helix
b) beta sheet
10. What is the name for the hemoglobin abnormality which causes red blood cells to
clump together and restrict blood flow?
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