MCB-EZ TEST FLASHCARDS

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The α-helix and β-pleated sheet are examples of which level of protein structure? Primary Secondary Tertiary Quaternary
When a protein is denatured, which level of protein structure is unaffected? Primary Secondary Tertiary Quaternary
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The final three-dimensional shape of a single polypeptide is called its _____________ structure. primary secondary tertiary quaternary
How is the following amino acid categorized? The structure shows its form at pH = 7. hydrophobic hydrophilic, positively charged hydrophilic, negatively charged hydrophilic, neutral None of the choices are correct.
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Which functional group forms covalent bonds and contributes to tertiary structure of proteins? NH2 COOH PO4 SH OH
Which amino acid has a -CH2CH2SCH3 as its R group? methionine alanine glycine tyrosine valine
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Functional groups found in amino acids include all of the following except -NH2. phosphate. -COOH. -OH. alkyl (linked multiple carbons with hydrogens).
Choose the amino acid containing an aromatic ring in its side chain. alanine glycine isoleucine tyrosine histidine
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Which portion of an amino acid is unique among the different amino acids? carboxyl amino hydrocarbon the side chain or R-group peptide bonding
You recently identified a novel protein that contains several membrane-spanning domains. Which of amino acids would you expect to be most common in these domains? nonpolar polar uncharged charged aromatic
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Which of the following shows the correct linkage of amino acids in a protein? amino group of one bonded to the amino group of the next acid group of one bonded to acid group of the next acid group of one bonded to amino group of the next All
The pleating or coiling of a protein is known as the protein's ____ structure. primary secondary tertiary quaternary
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Which of the following statements is FALSE concerning the bonding of amino acids? The addition of one water molecule is required to combine two amino acids.
Which of the following correctly matches the amino acid with its three-letter abbreviation? tryptophan: Try asparagine: Asp cystine: Cys isoleucine: Iso valine: Van
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The molecule below is a(n) amino acid. carbohydrate. lipid. nucleic acid.
When a protein is composed of more than one polypeptide chain, the arrangement of the chains is called the ____________ structure. primary secondary tertiary quaternary
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The primary structure this polypeptide is: globular pleated-sheet alpha helix alanine-leucine-tryptophane-glycien-valine-alanine
Which hydrophobic amino acid contains a sulfur atom in its side chain? alanine valine phenylalanine proline methionine
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Which amino acid has a methyl group as its R group? glycine alanine lysine valine tyrosine
A(n) ____ bond is formed between the reactants below. ionic hydrogen peptide polar
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The missing product below is O2 CO2 H2O
Which statement is false? Hydrophobic amino acids have nonpolar side chains. Hydrophobic amino acids are usually positively or negatively charged. Hydrophobic amino acids are found in the interior of proteins. Hydrophilic amino acids can be..
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With regard to protein structure, which level determines all others? primary secondary tertiary quaternary hepternary
Proteins can have separate domains with distinct structures and function. True False
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All amino acids within a protein are either polar charged or polar uncharged. True False
In gel filtration chromatography smaller proteins elute before larger ones. True False
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In reversed phase chromatography the most hydrophobic proteins elute first. True False
Which type of liquid column chromatography is likely to produce a separated according to: size electric charge hydrophobicity specific interaction with another molecule function
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Card 2

Front

The final three-dimensional shape of a single polypeptide is called its _____________ structure. primary secondary tertiary quaternary

Back

How is the following amino acid categorized? The structure shows its form at pH = 7. hydrophobic hydrophilic, positively charged hydrophilic, negatively charged hydrophilic, neutral None of the choices are correct.

Card 3

Front

Which functional group forms covalent bonds and contributes to tertiary structure of proteins? NH2 COOH PO4 SH OH

Back

Preview of the front of card 3

Card 4

Front

Functional groups found in amino acids include all of the following except -NH2. phosphate. -COOH. -OH. alkyl (linked multiple carbons with hydrogens).

Back

Preview of the front of card 4

Card 5

Front

Which portion of an amino acid is unique among the different amino acids? carboxyl amino hydrocarbon the side chain or R-group peptide bonding

Back

Preview of the front of card 5
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