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5.1
5.2
5.3
5.4
Overview
100
In order for something to be considered a lipid, it must have what single quality?
insoluble in water/hydrophobic
100
What maintains the secondary structure of a protein?
hydrogen bonds between the amino group of one peptide bond and the carboxyl group of another peptide bond
100
In sickle-cell disease, as a result of a single amino acid change, the mutant hemoglobin tetramers associate with each other and assemble into large fibers. Based on this information alone, we can conclude that sickle-cell hemoglobin exhibits
altered primary structure and altered quaternary structure; the secondary and tertiary structures may or may not be altered.
100
Which of the following are nitrogenous bases of the purine type? A) cytosine and guanine B) guanine and adenine C) adenine and thymine D) thymine and uracil E) uracil and cytosine
What is B
100
What is the term used for a protein molecule that assists in the proper folding of other proteins?
chaperonin
200
There are 20 different amino acids. What makes one amino acid different from another?
R groups attached to the alpha carbon
200
Which level of protein structure do the α helix and the β pleated sheet represent?
secondary
200
Molecules with which functional groups may form polymers via dehydration reactions?
either hydroxyl or carboxyl groups
200
If a DNA sample were composed of 10% thymine, what would be the percentage of guanine?
40%
200
Which of the following statements about the 5' end of a polynucleotide strand of DNA is correct? A) The 5' end has a hydroxyl group attached to the number 5 carbon of ribose. B) The 5' end has a phosphate group attached to the number 5 carbon of ribose. C) The 5' end has phosphate attached to the number 5 carbon of the nitrogenous base. D) The 5' end has a carboxyl group attached to the number 5 carbon of ribose. E) The 5' end is the fifth position on one of the nitrogenous bases.
What is B
300
Upon chemical analysis, a particular polypeptide was found to contain 100 amino acids. How many peptide bonds are present in this protein?
What is 99
300
The unique three-dimensional shape of the fully folded polypeptide is called the what structure
What is tertiary
300
Which of the following is not a polymer? A) glucose B) starch C) cellulose D) chitin E) DNA
What is glucose
300
If one strand of a DNA molecule has the sequence of bases 5'ATTGCA3', the other complementary strand would have the sequence A) 5'TAACGT3'. B) 5'TGCAAT3'. C) 5'UAACGU3'. D) 3'UAACGU5'. E) 5'UGCAAU3'.
What is B
300
One of the primary functions of RNA molecules is to synthesize what?
What is protein
400
What aspects of protein structure are stabilized or assisted by hydrogen bonds?
secondary, tertiary, and quaternary structures, but not primary structure
400
What type of covalent bond between amino acid side chains (R groups) functions in maintaining a polypeptide's specific three-dimensional shape?
disulfide bonds
400
A molecule with the chemical formula C6H12O6 is probably a
carbohydrate and monosaccharide only.
400
What methods may be used to elucidate the structures of purified proteins? A) X-ray crystallography B) bioinformatics C) analysis of amino acid sequence of small fragments D) NMR spectroscopy E) both X-ray crystallography and NMR spectroscopy
What is E
400
What 3 components make up a nucleotide?
What is a nitrogenous base, a phosphate group, and a pentose sugar
500
Which bonds are created during the formation of the primary structure of a protein?
What are peptide bonds
500
Misfolding of polypeptides is a serious problem in cells. Which of the following diseases are associated with an accumulation of misfolded polypeptides?
What is Alzheimer's and Parkinson's
500
Which of the following statements concerning saturated fats is NOT true? A) They are more common in animals than in plants. B) They have multiple double bonds in the carbon chains of their fatty acids. C) They generally solidify at room temperature. D) They contain more hydrogen than unsaturated fats having the same number of carbon atoms. E) They are one of several factors that contribute to atherosclerosis.
B
500
In a normal cellular protein, where would you expect to find a hydrophobic amino acid like valine?
interior away from water
500
Which of the following statements about the 5' end of a polynucleotide strand of DNA is correct? A) The 5' end has a hydroxyl group attached to the number 5 carbon of ribose. B) The 5' end has a phosphate group attached to the number 5 carbon of ribose. C) The 5' end has phosphate attached to the number 5 carbon of the nitrogenous base. D) The 5' end has a carboxyl group attached to the number 5 carbon of ribose. E) The 5' end is the fifth position on one of the nitrogenous bases.
What is B