Podcast
Questions and Answers
Gibbs free energy is more likely negative when_________.
Gibbs free energy is more likely negative when_________.
- entropy increases and enthalpy is low (correct)
- entropy decreases and enthalpy is high
- entropy and enthalpy are high
- entropy and enthalpy are low
What is the function of proteins inside cells?
What is the function of proteins inside cells?
- they can serve as structural support
- they can play a role in ligand recognition and signal transduction
- they can reduce bacterial loads through forming barriers on cells
- All of the above (correct)
The variable region on the surface of an antibody interacts specifically with an antigen through____.
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 (correct)
- exlusively covalent interactions
- many weak covalent interactions
- hydrophobic interactions
A protein can interact with water and lipds because__________
A protein can interact with water and lipds because__________
Which method is most suitable for determining the location of a protein inside the cell?
Which method is most suitable for determining the location of a protein inside the cell?
Triacyglycerols are ________.
Triacyglycerols are ________.
The word "nucleoside" refers to_______.
The word "nucleoside" refers to_______.
Hydrogen bonding between NH and C=O groups of every 4th amino acid within the polypeptide backbone results in which type of folding pattern?
Hydrogen bonding between NH and C=O groups of every 4th amino acid within the polypeptide backbone results in which type of folding pattern?
Linkage of nucleotides into nucleic acid chains occurs through a __________, leading to __________.
Linkage of nucleotides into nucleic acid chains occurs through a __________, leading to __________.
How does binding of a signaling molecule to its receptor affect its activity?
How does binding of a signaling molecule to its receptor affect its activity?
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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