Download Biochemistry Quiz: Urea Cycle, Electron Transport Chain, and ATP Synthase and more Exams Nursing in PDF only on Docsity!
Question 1
3 / 3 pts
True or False: The majority of reactions of the urea cycle occur in the cytosol.
TRUE
Question 2
3 / 3 pts
True or False: NADH yields 1.5 ATP molecules after donating electrons and hydrogen atoms to the electron transfer chain (ETC).
FALSE
Question 3
3 / 3 pts
True or False: GTP is invested in the urea cycle.
FALSE
Question 4
3 / 3 pts
True or False: There are six complexes associated with the ETC.
FALSE
Question 5
3 / 3 pts
True or False: In the production of ATP via ATP synthase, the H + ions move from the mitochondrial matrix to the intermembrane space.
FALSE
Question 6
3 / 3 pts
The urea cycle involves _________ reactions (only those in the cyclic portion of the process).
4
Question 7
3 / 3 pts
Which amino acids are involved in the urea cycle?
A. Ornithine B. Aspartate C. Threonine D. Both A and B E. Both A and C D.BOTH A AND B
Question 8
3 / 3 pts
Fumarate is converted to ________ for it to reenter the mitochondrion.
Ornithine Citrulline Malate Fumarase Ammonia MALATE
Question 9
3 / 3 pts
Urea is useful for excreting nitrogen from cells due to its:
A. Ability to form London forces B. High density of nitrogen atoms C. Large size D. Low melting point E. Both B and C
C. NO 2
D. NH 3
E. NH 4+
E. NH 4+
Question 12
3 / 3 pts
The following chemical species is __________.
Ammonium Fumarate Arginine Argininosuccinate Urea UREA
Question 13
3 / 3 pts
FADH 2 donates electrons and H + to complex ______.
I
II
III
IV
V
II
Question 14
3 / 3 pts
Which of the ETC complexes do pump H + ions?
Complex I Complex III Complex IV All of the above None of the above ALL OF THE ABOVE
Question 15
3 / 3 pts
What protein shuttles electrons from Complex III to Complex IV?
NADH dehydrogenase Correct! Cytochrome C Fumarase Cytochrome B None of the above CoQ
Question 17
3 / 3 pts
In what portion of the mitochondrion does the CAC take place?
Matrix Intermembrane space
FROM THE MATRIX TO THE INTERMEMBRANE SPACE
Question 20
3 / 3 pts
Energy released _________________ is utilized for the synthesis of ATP.
As protons flow through ATP synthase and back into the mitochondrial matrix In the digestion of proteins In the degradation of carbohydrates In the formation of ATP None of the above AS PROTONS FLOW THROUGH ATP SYNTHASE AND BACK INTO THE MITOCHONDRIAL MATRIX
Question 21
3 / 3 pts
The H + ions flow through what part of the ATP synthase?
A. FO
B. F 1
C. F 2
D. Stator
E. Both A and C
A. FO
Question 22
3 / 3 pts
An individual with the MERRF disease, tend to have symptoms of _________.
Muscle weakness Elevated Blood pressure Swollen feet Red eyes None of the above MUSCLE WEAKNESS
Question 23
3 / 3 pts
ATP synthase is located in the __________ of mitochondria.
A. Inner membrane B. Intermembrane space C. Outer membrane D. Both A and B E. Both B and C A.INNER MEMBRANE
Question 24
3 / 3 pts
What process results in ATP formation?
A. H 2 O in ATP synthase
B. GTP is produced first
C. Heat applied to ATP synthase
D. Rotation of ATP synthase
E. None of the above
D. ROTATION OF ATP SYNTHASE
A) citric acid cycle
B) ATP
C) ATP
D) ADP and Pi
E) electron transport chain
Question 27
7 / 10 pts
According to the chemiosmotic theory, how is the ETC connected to ATP production?
Explain in at least four complete sentences.
The chemical reactions of the ETC provide energy to pump H + ions from the mitochondrial matrix into the intermembrane space. The reactions also provide electrons and H + to convert oxygen into water. The net result is that the H + gradients permit a flow H + to rotation ATP synthase, producing ATP.
nt is formed more clearly (be specific that the ETC transport creates a gradient).
Question 28
10 / 10 pts
Consider the importance of the mitochondria in energy production.
A. What structural features of mitochondria support ATP formation?
And
B. Where are the complexes of the ETC located in Mitochondria?
This organelle is the central hub of energy production in the cell and has a complicated structure, including two membranes. The mitochondrion has an outer membrane and an inner membrane. The outer membrane is a bilayer with porin proteins that permit ions and molecules to cross into the intermembrane space. The intermembrane space is the solution between the outer and inner membranes. The inner membrane is a highly selective bilayer permitting only select ions and molecules to cross. The selectivity is crucial for maintaining specific concentrations of H + , ATP, and other species in the mitochondrial matrix. The inner membrane also contains the electron transport chain's protein complexes, which accepts the electrons from the coenzymes. The matrix is the innermost space of mitochondrion, where the citric acid cycle occurs along portions of fatty acid oxidation and the urea cycle. Once the NADH and FADH 2 are produced by the citric acid cycle, they are in proximity to the electron transport chain, so that donation of electrons and hydrogen ions is efficient.
