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Which of the following biological molecules contain peptide bonds?
Proteins Carbohydrates Lipids Nucleic Acids Bloom’s level: Knowledge/Understanding
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A C Which one is… a lipid a nucleotide an amino acid a carbohydrate B B D
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What is the function of chaperonin proteins?
Denaturation of polypeptides Assembling amino acids Regulation of gene expression Folding proteins None of the above Bloom’s level: Knowledge/Understanding
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Which amino acid is responsible for the formation of disulfide bonds?
Alanine Proline Tyrosine Cysteine Isoleucine Bloom’s level: Knowledge/Understanding
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Which amino acid would be considered basic?
Alanine Lysine Tyrosine Cysteine Isoleucine
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Which amino acid would be considered acidic?
Alanine Lysine Tyrosine Glutamate Isoleucine
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The addition of water to break a chemical bond is termed –
Dehydration synthesis Hydrolysis Condensation Catabolism Disassociation Bloom’s level: Knowledge/Understanding
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Which of the following is not a function of proteins?
Coding for polypeptides Catalyzes chemical reactions Transport of material Structural components of tissues All of the above are protein functions Bloom’s level: Knowledge/Understanding
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Each strand of DNA contains nucleotides that are covalently bonded together through polymerization. These connecting bonds are called phosphodiester bonds. This is true This is false Bloom’s level: Knowledge/Understanding
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The energy in carbohydrates is stored in the C-H bonds.
This is true This is false Bloom’s level: Knowledge/Understanding
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If a chromosome contains 20% thymine, how much guanine should it have?
10% 20% 30% 40% Bloom’s level: Application
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Which of the following is an amino group?
-OH -C=O -COOH -SH -NH2 Bloom’s level: Knowledge/Understanding
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Dehydration synthesis –
Is used to link monomers Removes water to form bonds Is involved in protein synthesis Can form disaccharides All of the above Bloom’s level: Application
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Lincosamides are a class of antibiotics that inhibit peptide bond formation. What type of biological molecule would be affected? Lipids Proteins Nucleic Acids Carbohydrates Bloom’s level: Application
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A person is lactose intolerant. What type of molecule is lactose?
Monosaccharide Disaccharide Oligosaccharide Polysaccharide Bloom’s level: Application
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If a strand of DNA has a sequence
5’-ATCCTAG-3’, what would be the complementary sequence? 5’-CGAAGAT-3’ 5’-TAGGATC-3’ 3’-TAGGATC-5’ 3’-CGAAGTC-5’ Bloom’s level: Application
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If a cell was grown in a growth medium that has a radioactive sulfur isotope which class of biomolecules will show the presence of the isotope? Nucleic acids Carbohydrates Lipids Proteins Bloom’s level: Analysis
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How can changes in pH affect protein structure?
By causing hydrolysis of the peptide bond By changing the charges on certain amino acid sidechains By breaking the sidechains off of the alpha carbons By joining proteins together in long chains
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This would be : A. beta sheet; B. alpha helix; C. nucleic acid; D
This would be : A. beta sheet; B. alpha helix; C. nucleic acid; D. lipid
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This would be : A. beta sheet; B. alpha helix; C. nucleic acid; D
This would be : A. beta sheet; B. alpha helix; C. nucleic acid; D. lipid
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Most biological buffers consist of a pair of molecules, one an acid and one a base
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Chemical reactions Chemical reactions involve the formation or breaking of chemical bonds Atoms shift from one molecule to another without any change in number or identity of atoms Reactants = original molecules Products = molecules resulting from reaction 6H2O + 6CO → C6H12O O2 reactants products
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Extent of chemical reaction influenced by
Temperature Concentration of reactants and products Catalysts Many reactions are reversible
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