PORTAGE LEARNING CHEM 210 - MODULE 8 EXAM.
Portage Learning Chem 210 - Module 8 exam.
True or False: The majority of reactions of the urea cycle occur
... [Show More] in the cytosol.
TRUE
True or False: NADH yields 1.5 ATP molecules after donating electrons and hydrogen atoms to the electron transfer chain (ETC).
FALSE
True or False: GTP is invested in the urea cycle.
FALSE
True or False: There are six complexes associated with the ETC.
FALSE
True or False: In the production of ATP via ATP synthase, the H+ ions move from the mitochondrial matrix to the intermembrane space.
FALSE
The urea cycle involves reactions (only those in the cyclic portion of the process).
1
2
Question 1
3 / 3 pts
Question 2
3 / 3 pts
Question 3
3 / 3 pts
Question 4
3 / 3 pts
Question 5
3 / 3 pts
Question 6
3 / 3 pts
Question 9
3 / 3 pts
3
4
5
4
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
Fumarate is converted to for it to reenter the mitochondrion.
Ornithine Citrulline Malate Fumarase Ammonia MALATE
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
Question 7
3 / 3 pts
Question 8
3 / 3 pts
B. HIGH DENSITY OF NITROGEN ATOMS
is both a component of the urea cycle and the citric acid cycle.
Malate
Acetyl-CoA
Citrate
Fumarate
None of the above
FUMARATE
Deamination of an amino acid results in a carbon skeleton and in the production of
.
A. NH2
B. NH
Question 10
3 / 3 pts
Question 11
3 / 3 pts
C. NO2
D. NH3
E. NH4+
E. NH4+
The following chemical species is .
Ammonium Fumarate Arginine Argininosuccinate Urea
UREA
FADH2 donates electrons and H+ to complex .
I II
Question 12
3 / 3 pts
Question 13
3 / 3 pts
III IV V
II
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
What protein shuttles electrons from Complex III to Complex IV? NADH dehydrogenase
Cytochrome C Fumarase Cytochrome B None of the above
CoQ
In what portion of the mitochondrion does the CAC take place?
Matrix Intermembrane space
Question 14
3 / 3 pts
Question 15
3 / 3 pts
Question 17
3 / 3 pts
Inner membrane Outer membrane Both B and C
MATRIX
At which complex does the following reaction take place?
O2 + 4e- + 4H+
→
→ 2H2O
Complex I Complex II Complex III Complex IV Both A and B
COMPLEX IV
During the electron transport chain, protons are pumped from in the mitochondria.
From the intermembrane space to the cytosol From the intermembrane space to the matrix From the matrix to the intermembrane space From outside of the cell to the cytosol
From outside of the cell to the matrix
Question 18
3 / 3 pts
Question 19
3 / 3 pts
FROM THE MATRIX TO THE INTERMEMBRANE SPACE
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
The H+ ions flow through what part of the ATP synthase?
A. FO
B. F1
C. F2
D. Stator
E. Both A and C
A. FO
An individual with the MERRF disease, tend to have symptoms of .
Question 20
3 / 3 pts
Question 21
3 / 3 pts
Question 22
3 / 3 pts
Muscle weakness Elevated Blood pressure Swollen feet
Red eyes
None of the above MUSCLE WEAKNESS
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
What process results in ATP formation?
A. H2O 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
Question 23
3 / 3 pts
Question 24
3 / 3 pts
Which of the following is not a part of ATP synthase?
A. F
B. FO
C. F1
D. F2
E. Both A and D E.BOTH AND D
(Fill in the blanks) Use the word bank to fill in the following blanks. In the word bank, each word or words is separated by semicolons. Words can be used more than once, and not all words will be used.
Word bank: ADP and Pi; ATP; GTP; oxidative; reductive; citric acid cycle; electron transport chain; three; eight; ten
The (A) produces NADH and FADH2 which can then be used to produce
(B) .
Oxidative phosphorylation is the synthesis of (C) from (D) , using energy generated by the oxidative reactions during the (E) .
Question 25
3 / 3 pts
Question 26
4 / 5 pts
A) citric acid cycle
B) ATP
C) ATP
D) ADP and Pi
E) electron transport chain
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).
Consider the importance of the mitochondria in energy production.
A. What structural features of mitochondria support ATP formation?
And
Question 27
7 / 10 pts
Question 28
10 / 10 pts
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 FADH2 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. [Show Less]