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Which of the following statements about protein folding is correct? i. The nati…

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Wize University Biology Textbook > Energy & Metabolism

Types of Energy [Potential, Kinetic, Free & Activation]

7 Activities

Wize University Biology Textbook > Chemistry of Life

Proteins

8 Activities

Which of the following statements about protein folding is correct?
i. The native conformation of a protein is determined by the structure with the lowest free energy
ii. Denaturation of a protein results from high temperatures or exposure to chemicals like urea
iii. Protein folding is based on primary structure
iv. Protein folding always requires ATP
More Types of Energy [Potential, Kinetic, Free & Activation] Questions:
C6H12O6 + 6O2 --> 6CO2 +6H2O is the balanced chemical equation for respiration. Is the process exergonic or endergonic?
Why is the gibbs free energy change for ATP +H2O -> ADP +Pi a greater negative value than the gibbs free energy change for AMP +H2O -> Adenosine + Pi?
Coupled Reactions
What is the gibbs free energy of reaction for a coupled reaction where one process has a standard free energy change of +43 kJ/mol and the other has a standard free energy change of -16kJ/mol?
Is this coupled reaction spontaneous or non-spontaneous?
High transfer potential: Similar to 2014 Question 8
Which of the following reactions has the most negative free energy change?
Free Energy
How can unfavourable reactions occur in a cell?
Which of the following have a negative ΔG?
Wize Exam Practice Questions:
Which of the following enzymes catalyzes a reversible reaction?
Similar to 2018 exam Q4
Provide 2 examples of coupled reactions found in cellular respiration, then give a detailed explanation of each. Use free energy values were necessary (6pts)
Free Energy Diagram
Which letter represents the energy of activation of the reaction in the absence of enzyme? Which letter represents the free energy of the reaction?
If the entropy of a system is large, the enthalpy is negative and the temperature of the system is high, which of the following would be correct? All other conditions are constant and controlled. Select all that apply.
Gibbs Free Energy
Which of the following is true about an exergonically coupled reaction? Select all that apply.
The net ΔG is negative
There are more than 2 reactions happening at the same time
High transfer potential: Similar to 2014 Question 8
Which of the following reactions has the most negative free energy change?
Coupled Reactions
What is the gibbs free energy of reaction for a coupled reaction where one process has a standard free energy change of +43 kJ/mol and the other has a standard free energy change of -16kJ/mol?
Is this coupled reaction spontaneous or non-spontaneous?
Why is the gibbs free energy change for ATP +H2O -> ADP +Pi a greater negative value than the gibbs free energy change for AMP +H2O -> Adenosine + Pi?
What is the net free energy change of two reactions and indicate if it is favourable or unfavourabe. One with a free energy change of -26 kJ/mol and the other with +15 kJ/mol.
Practice: Enzyme Catalyzed Reactions
What is FALSE about this energy diagram of an uncatalyzed reaction?
Practice: Polymerization
Polymerization reactions are endergonic, why?
Free Energy
How can unfavourable reactions occur in a cell?
A bike at the top of a mountain represents what type of energy? [1 word]
Practice: What is Gibbs Free Energy?
What does Gibbs free energy determine?
Practice: Thermodynamics
Which enthalpic and entropic combinations will result in a spontaneous bilayer formation?
Which of the following would result in spontaneous membrane transport?
Using Gibb's Free Energy, an example
A biochemical pathway produces metabolite E. This pathway consists of A, B, C and D intermediates that require enzymes 1, 2, 3 and 4 to catalyze each step of the reaction.
a. Given the following information about each reaction, state which reactions are exergonic or endergonic. Where possible, state which reactions are exothermic or endothermic.
i. A → B, ΔG = +3
Given the Gibb's Free Energy of a reaction, predict if the reaction is spontaneous
Given the below steps to a biological reaction, what can you infer about each step? What can you predict about the reaction as a whole?
Using Gibb's Free Energy, an example
A biochemical pathway produces metabolite E. This pathway consists of A, B, C and D intermediates that require enzymes 1, 2, 3 and 4 to catalyze each step of the reaction.
a. Given the following information about each reaction, state which reactions are exergonic or endergonic. Where possible, state which reactions are exothermic or endothermic.
i. A → B, ΔG = +3
Given the below steps to a biological reaction, what can you infer about each step? What can you predict about the reaction as a whole?
(i.e. what is ΔGTotal\Delta G_{Total} )
C6H12O6 + 6O2 --> 6CO2 +6H2O is the balanced chemical equation for respiration. Is the process exergonic or endergonic?
When a misfolded protein is being linearlized by the proteasome it requires ATP, why?
Given the figure, which of the following statements is correct?
Which of the following are accurate statements regarding membrane transport?
i. The entropy of the system decreases during active transport which is why it requires the use of ATP
ii. Passive diffusion functions because of an increase in entropy
Why are enzymes vital for life?
Given the following information, what is the value of the change in free energy?
T = 25oC
Entropy of the reactants = 3
Given the figure below, which of the following is true?
Which of the following statements best describes the enthalpy change of a reaction?
Which of the following enzymes catalyzes a reversible reaction?
A reaction with a positive ΔG is considered...
Which of the following have a negative ΔG?
Which of the following is true regarding non-spontaneous reactions?
Why are ADP + inorganic phosphate (Pi) more stable than ATP?
Fill in the blanks: Spontaneous reactions are _____________, and have a _____________ change in free energy.
How does energy coupling work?
Which of the following is true regarding non-spontaneous reactions?
Which of the following enzymes catalyzes an unfavorable reaction?
More Proteins Questions:
Practice: C-Terminus
Which of the following statements about the C-terminal end of a polypeptide strand is correct?
i. The C-terminal end has a hydroxyl group
Practice: Fatty Acids
What chemical reaction occurs to join fatty acids monomers and what is the linkage called?
Practice: C Terminus
Which of the following statements about the C terminal end of a polypeptide strand is correct?
i. The C terminal end has a hydroxyl group
Practice: Monomers and Polymers
Choose the pair of terms that correctly completes this sentence:
Nucleotides are to __________ as __________ are to proteins
Practice: Fatty Acids
What chemical reaction happens to join fatty acids monomers and what is the linkage?
Practice: Beta Sheet
A beta sheet is an example of what?
Bonds in Proteins
List the names of these bonds in order
Bonds in Proteins
List the names of these bonds in order
Bonds in Proteins
List the names of these bonds in order
Which of the following dictates the 3D protein folding structure?
lipids
What chemical reaction happens to join the monomers of lipids and what is the linkage?
Practice: Parts of an Amino Acid
Which is a component of an amino acids?
Wize Exam Practice Questions
Which of the following dictates the 3D protein folding structure?
Wize Exam Practice Questions
Which of the following dictates the 3D protein folding structure?
Practice: C Terminus
Which of the following statements about the C terminal end of a polypeptide strand is correct?
i. The C terminal end has a hydroxyl group
Practice: Monomers and Polymers
Choose the pair of terms that correctly completes this sentence:
Nucleotides are to __________ as __________ are to proteins
Practice: Fatty Acids
What chemical reaction happens to join fatty acids monomers and what is the linkage?
Translocators are used to move
What do chaperonin proteins do?
Which of the following is a role of proteins? (may be multiple answers).
You analyze a peptide with 150 amino acids, how many peptide bonds are there?
Which of the following go together?
Which ones go together! I didn't see any questions with exactly this format but it's similar to multiple choice.
At which bond would water need to be added to achieve hydrolysis of the peptide, back to its component amino acids?
Which of the following statements about the C terminal end of a polypeptide strand is correct?
i. The C terminal end has a hydroxyl group
ii. The C terminal end has an amino group
If an amino acid had a terminal OH- group in it’s R-chain it would:
i. Be hydrophobic
ii. Be hydrophilic
A backbone consisting of N-C-C-N-C-C uses what type of bond?
Choose the pair of terms that correctly completes this sentence:
Nucleotides are to __________ as __________ are to proteins
Choose the false statements:
lipids
What chemical reaction happens to join monomers and what is the linkage?
Practice: Forces Holding Together a Protein
What level of structure is stabilized by disulfide bonds (from cysteine residues)?
Practice: Parts of an Amino Acid
Which in a component of an amino acids:
Bonds in Proteins
List the names of these bonds in order
Which of the following best describes tertiary structure?
You are studying a protein and recognize the primary structure (the amino acid sequence) has been mutated. Which of the following COULD be changed
Amino acids
What determines the group to which an amino acid belongs?
Practice: The Importance of Carbon
What makes carbon an important element?
Protein Practice Problem
List all the types of interactions (i.e. H-bonding) that occur within a protein in order of their ability to withstand denaturation. Which protein structures are most affected?
protein structure
What level of protein structure is this showing?
What type of non-covalent bonds are generally formed in the secondary structure of protein?
Practice: Protein 3D Folding
Which of the following dictates the 3D protein folding structure?
Practice: Beta Sheet
A beta sheet is an example of what?
When a misfolded protein is being linearlized by the proteasome it requires ATP, why?
Which of the following is the most important for determining protein function?
How does a chaperonin work?
Fill in the blank: __________________ are big complexes that provide an internal folding cavity for proteins, and are ____________________.
Which of the following is not an enzymatic function?
Which of the following is true regarding molecular chaperones?
Which of the following is not a function of proteins in an organism?
Which of the following could affect all of the primary, secondary, and tertiary structure
of a protein?
Which of the following would most likely participate in cell-cell recognition events?
How do large, uncharged polar molecules pass through a cell membrane?
Fill in the blank: __________________ are big complexes that provide an internal folding cavity for proteins, and are ____________________.
Translation and Primary structure Question
A protein coding polypeptide chain... (select all that apply)
To properly fold, protein X cannot be exposed to any other proteins during the folding process. Which of the following is likely required for protein X to fold properly?
Which of the following is responsible for protein tertiary structure?
A beta sheet is an example of what?
The amino acid serine contains a hydroxyl group on its R-group that is able to form H-bonds. Serine would fit into which group of amino acids?
What is the alpha carbon of an amino acid?
Secondary structure
Secondary structures like alpha helices and beta sheets are held together by
hydrogen
bonds.
Which of the following dictates the 3D protein folding structure?
Membrane Proteins
If a random protein was mutated, what effect do you think that the following amino acid substitutions would have on the structure of the protein? Would these substitutions affect secondary, tertiary, or quaternary protein structure?
a. Cys →\rightarrow Pro
b. Asp →\rightarrowLys
Membrane Proteins
What is the difference between secondary and tertiary protein structure?