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Bonus Quiz

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Justine C.
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10 Questions

Gibbs free energy is more likely negative when_________.

entropy increases and enthalpy is low

What is the function of proteins inside cells?

All of the above

The variable region on the surface of an antibody interacts specifically with an antigen through____.

many weak noncovalent interactions, such as van der Waals interactions and hydrogen bonds

A protein can interact with water and lipds because__________

it has polar and hydrophobic amino acids.

Which method is most suitable for determining the location of a protein inside the cell?

confocal microscopy

Triacyglycerols are ________.

the most common fat storage molecules in cells

The word "nucleoside" refers to_______.

the nitrogen base and sugar ring

Hydrogen bonding between NH and C=O groups of every 4th amino acid within the polypeptide backbone results in which type of folding pattern?

α helix (D)

Linkage of nucleotides into nucleic acid chains occurs through a __________, leading to __________.

condensation reaction; phosphodiester bond formation

How does binding of a signaling molecule to its receptor affect its activity?

All of the above

Study Notes

Gibbs Free Energy

  • More likely to be negative when the reaction is spontaneous

Protein Functions

  • Perform various functions inside cells, including catalyzing metabolic reactions, replicating DNA, responding to stimuli, transporting molecules, and regulating metabolism

Antibody-Antigen Interactions

  • The variable region on the surface of an antibody interacts specifically with an antigen through shape complementarity and ionic and hydrogen bonds

Protein Interactions

  • Can interact with water and lipids because of their amphipathic nature, having both hydrophobic and hydrophilic regions

Protein Localization

  • The most suitable method for determining the location of a protein inside the cell is fluorescence microscopy

Triacylglycerols

  • Are non-polar, hydrophobic molecules

Nucleosides

  • Refer to a nitrogenous base linked to a five-carbon sugar molecule

Protein Folding

  • Hydrogen bonding between NH and C=O groups of every 4th amino acid within the polypeptide backbone results in an alpha-helical folding pattern

Nucleic Acid Synthesis

  • Linkage of nucleotides into nucleic acid chains occurs through a dehydration reaction, leading to the formation of a phosphodiester bond

Signal Transduction

  • Binding of a signaling molecule to its receptor affects its activity by inducing a conformational change, which then triggers a response

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