Hydrolysis of ATP & Glycolysis, Enzyme, Active Site, Substrate. Final Quiz – Biochemistry
The key terms in this Biochemistry course include ATP, Hydrolysis of ATP, Glycolysis, Exergonic, Enzyme, Free Energy, Active Site, Phosphate, Substrate, Conformation of the Active Site, Mitochondrial Memebrane, cellular respiration, Pyruvate, Citric Acid Cycle, Electron Transport Chain, Acetyl CoA
Which of the following statements describes a central role that ATP plays in cellular metabolism?
Hydrolysis of ATP provides an input of free energy for exergonic reactions.
ATP provides energy coupling between exergonic and endergonic reactions. – correct
Hydrolysis of the terminal phosphate group stores free energy that is used for cellular work.
Its terminal phosphate bond is stronger than most covalent bonds in other biological macromolecules.
Which of the following is not true about enzymes:
They increase ∆G of reactions. – correct
They are usually made of amino acids.
Enzymes lower the activation energy of chemical reactions.
Each one is specific to the particular substrate(s) to which it binds.
An allosteric inhibitor does which of the following?
Binds to an enzyme away from the active site and changes the conformation of the active site, increasing its affinity for substrate binding.
It binds to the active site and blocks it from binding substrate
Binds to an enzyme away from the active site and changes the conformation of the active site, decreasing its affinity for the substrate. – correct
Binds directly to the active site and mimics the substrate.
Choose the correct options to label the mitochondria below.
Cristae
E
Matrix
B
Inner mitochondrial memebrane
C
Outer mitochondrial membrane
A
Innermembrane space
D
In which reactions of cellular respiration does oxidative phosphorylation occur? Choose ALL the correct choices.
Glycolysis
Pyruvate Oxidation
Citric Acid Cycle
Electron Transport Chain- correct
Fill in the Blank.
- Each molecule of NAD+ can accept 2 ________ and 1 _________ .
- Each molecule of FAD can accept 2 electrons and ________.
Answer 1:
electrons- correct
Answer 2:
proton – correct
Answer 3:
hydrogen atoms- correct
Fill in the blanks with the choices below.
- During the citric acid cycle, NAD+ is Reduced to NADH.
- And During Cellular Respiration, glucose is Oxidized to carbon dioxide.
- During Cellular Respiration, oxygen is reduced to Water .
- At the electron transport chain, NADH is oxidized to NAD+ .
Answer 1:
Reduced- correct
Answer 2:
Oxidized- correct
Answer 3:
Water- correct
Answer 4:
NADH- correct
Answer 5:
NAD+- correct
Which kind of metabolic poison would most directly interfere with glycolysis?
an agent that reacts with oxygen and depletes its concentration in the cell
any agent that binds to pyruvate and inactivates it
an agent that closely mimics the structure of glucose but is not metabolized- correct
an agent that reacts with NADH and oxidizes it to NAD+
In glycolysis, for each molecule of glucose oxidized to pyruvate, ___
two molecules of ATP are used, and two molecules of ATP are produced
two molecules of ATP are used, and four molecules of ATP are produced- correct
four molecules of ATP are used, and two molecules of ATP are produced
two molecules of ATP are used, and six molecules of ATP are produced
If glucose is the sole energy source, what fraction of the carbon dioxide exhaled by animals is generated only by the reactions involved in oxidation of pyruvate to acetyl CoA?
1/6
1/3- correct
1/2
2/3
All of it
Fill in the Blank.
- Each molecule of NAD+ can accept 2 ________ and 1 _________ .
- Each molecule of FAD can accept 2 electrons and ________.
Answer 1:
electrons- correct
Answer 2:
proton – correct
Answer 3:
hydrogen atoms- correct
Which of the following combinations of products would result from three acetyl CoA molecules entering the citric acid cycle?
1 ATP, 2 CO2, 3 NADH, and 1 FADH2
3 ATP, 3 CO2, 3 NADH, and 3 FADH2
3 ATP, 6 CO2, 9 NADH, and 3 FADH2- correct
6 ATP, 6 CO2, 3 NADH, and 12 FADH2
How many NADH molecules are produced on each turn of the citric acid cycle?
one
two
three- correct
four
Which of the following statements describes a central role that ATP plays in cellular metabolism?
Hydrolysis of ATP provides an input of free energy for exergonic reactions.
ATP provides energy coupling between exergonic and endergonic reactions. – correct
Hydrolysis of the terminal phosphate group stores free energy that is used for cellular work.
Its terminal phosphate bond is stronger than most covalent bonds in other biological macromolecules.
Which of the following is not true about enzymes:
They increase ∆G of reactions. – correct
Enzymes are usually made of amino acids.
They lower the activation energy of chemical reactions.
Each one is specific to the particular substrate(s) to which it binds.
An allosteric inhibitor does which of the following?
Binds to an enzyme away from the active site and changes the conformation of the active site, increasing its affinity for substrate binding.
It binds to the active site and blocks it from binding substrate
Binds to an enzyme away from the active site and changes the conformation of the active site, decreasing its affinity for the substrate. – correct
Binds directly to the active site and mimics the substrate.
Choose the correct options to label the mitochondria below.
Cristae
E
Matrix
B
Inner mitochondrial memebrane
C
Outer mitochondrial membrane
A
Innermembrane space
D
In which reactions of cellular respiration does oxidative phosphorylation occur? Choose ALL the correct choices.
Glycolysis
Pyruvate Oxidation
Citric Acid Cycle
Electron Transport Chain- correct
Fill in the Blank.
- Each molecule of NAD+ can accept 2 ________ and 1 _________ .
- Each molecule of FAD can accept 2 electrons and ________.
Answer 1:
electrons- correct
Answer 2:
proton – correct
Answer 3:
hydrogen atoms- correct
Which of the following combinations of products would result from three acetyl CoA molecules entering the citric acid cycle?
1 ATP, 2 CO2, 3 NADH, and 1 FADH2
3 ATP, 3 CO2, 3 NADH, and 3 FADH2
3 ATP, 6 CO2, 9 NADH, and 3 FADH2- correct
6 ATP, 6 CO2, 3 NADH, and 12 FADH2
How many NADH molecules are produced on each turn of the citric acid cycle?
one
two
three- correct
four