Proteins Secondary Tertiary And Quaternary Structure - Biochemistry | Biology+

Course

Biochemistry

Study Pack

Set 1: The Facts of Life: Chemistry Is the Logic of Biological Phenomena

Set 2: Water: the Medium of Life

Set 3: Thermodynamics of Biological Systems

Set 4: Amino Acids and the Peptide Bond

Set 5: Proteins: Their Primary Structure and Biological Functions

Set 6: Proteins: Secondary, Tertiary, and Quaternary Structure

Set 7: Carbohydrates and the Glycoconjugates of Cell Surfaces

Set 9: Membranes and Membrane Transport

Set 10: Nucleotides and Nucleic Acids

Set 11: Structure of Nucleic Acids

Set 12: Recombinant Dna, Cloning, Chimeric Genes, and Synthetic Biology

Set 13: Enzymeskinetics and Specificity

Set 14: Mechanisms of Enzyme Action

Set 15: Enzyme Regulation

Set 16: Molecular Motors

Set 17: Metabolism: an Overview

Set 18: Glycolysis

Set 19: The Tricarboxylic Acid Cycle

Set 20: Electron Transport and Oxidative Phosphorylation

Set 21: Photosynthesis

Set 22: Gluconeogenesis, Glycogen Metabolism, and the Pentose Phosphate Pathway

Set 23: Fatty Acid Catabolism

Set 24: Lipid Biosynthesis

Set 25: Nitrogen Acquisition and Amino Acid Metabolism

Set 26: Synthesis and Degradation of Nucleotides

Set 27: Metabolic Integration and Organ Specialization

Set 28: Dna Metabolism: Replication, Recombination, and Repair

Set 29: Transcription and the Regulation of Gene Expression

Set 30: Protein Synthesis

Set 31: Completing the Protein Life Cycle: Folding, Processing, and Degradation

Set 32: The Reception and Transmission of Extracellular Information

Set 6 Proteins Secondary Tertiary And Quaternary Structure

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Set 6 Proteins Secondary Tertiary And Quaternary Structure

(Multiple Choice)

Free

Alpha helices are stabilized primarily by:

A) hydrogen bonds between the main chain peptide bond component atoms.
B) electrostatic interactions between R-groups.
C) hydrophobic interactions between the α-carbons of the main chain.
D) hydrogen bonding between the R-groups.
E) hydrophobic interactions between R-groups and the solvent water.

Answer

(Multiple Choice)

Free

β-Turns in a peptide chain form a tight loop with hydrogen bonding of the carbonyl oxygen with:

A) side chain amine of lysine two amino acids down the chain.
B) amide proton on the next amino acid down the chain.
C) amide proton of the glutamine side chain.
D) amide proton of the residue three positions down the chain.
E) amide proton of asparagine side chain.

Answer

(Multiple Choice)

Free

If the following section of a polypeptide is folded into an α-helix, to which amino acid is the carbonyl group of alanine hydrogen bonded?
Ala-ser-val-asp-glu-leu-gly

A) serine
B) aspartic acid
C) glutamic acid
D) leucine
E) valine

Answer