PORTAGE LEARNING CHEM 210 TEST 8. | 2021 EXAM
Test 8
CORRECT ANSWERS IN RED
Question 1
True or False: The majority of reactions of the urea cycle
... [Show More] occur in the mitochondrial matrix. True
False
Question 2
True or False: FADH2 yields 1.5 ATP molecules after donating electrons and hydrogen atoms to the electron transfer chain (ETC).
Correct! True False
Question 3
True or False: GTP is invested in the urea cycle. True
Correct! False
Question 4
True or False: There are five complexes associated with the ETC. True
False
Question 5
True or False: In the production of ATP via ATP synthase, the H+ ions move from the mitochondrial matrix to the intermembrane space.
True False
Question 6
The urea cycle involves reactions (only those in the cyclic portion of the process).
Correct! 4
5
6
8
10
Question 7
Which amino acids are involved in the urea cycle?
A. Arginine
B. Aspartate
C. Threonine
D. Both A and C
E. Both A and B
Question 8
Fumarate is converted to for it to reenter the mitochondrion. You Answered
Ornithine Citrulline Malate Fumarase Ammonia
Question 9
Urea is useful for excreting nitrogen from cells due to its:
Ability to hydrogen bond with water Ability to form ions
Large size
Low melting point None of these
Question 10
Which component of the urea cycle is also a member of the CAC? Fumarate
Malate Acetyl-CoA Citrate
None of the above
Question 11
Deamination of an amino acid results in a carbon skeleton and in the production of .
A. NH2
B. NH
C. NO2
D. NH3
E. NH4+
A B C D
E
Question 12
The following chemical species is . Ammonium
Fumarate Arginine Argininosuccinate Urea
Question 13
NADH donates electrons and H+ to complex . I
II III IV V
Question 14
Which of the ETC complexes do pump H+ ions?
Complex I Complex III Complex IV
All of the above None of the above
Question 15
What protein shuttles electrons from Complex III to Complex IV?
NADH dehydrogenase Cytochrome C Fumarase Cytochrome B
None of the above
Question 16
What molecule accepts electrons and H+ ions from complexes I and II and transfers them to complex III? NADH
FAD
Cytochrome C Cytochrome B CoQ
Question 17
In what portion of the mitochondrion is the ETC located?
Matrix Intermembrane space Inner membrane Outer membrane Both B and C
Question 18
At which complex does the following reaction take place? NADH + H+ + CoQ NAD+ + CoQH2
Complex I Complex II
Complex III Complex IV Both A and B
Question 19
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 20
Energy released is utilized for the synthesis of ATP. In the formation of ATP
In the digestion of proteins through the breakdown into the carbon skeleton In the degradation of carbohydrates
As proton flow through ATP synthase None of the above
At which part of ATP synthase is ATP produced?
A. FO
B. F1
C. F2
D. Stator
E. Both A and C
A B C D E
Question 22
An individual with the MERRF disease, tend to have symptoms of . Blood pressure issues
Headaches Degenerated nerve cells Red eyes
None of the above
Question 23
In mitochondria, the complex that produces ATP is located in the .
A. Intermembrane space
B. Outer membrane
C. Inner membrane
D. Both A and B
E. Both B and C
Question 24
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
A B C D E
Question 25
Which of the following is not a part of ATP synthase?
A. FO
B. F1
C. F2
D. Axle
E. Stator
A B C D E
Question 26
4 / 5 pts
(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) .
A) citric acid cycle
B) ATP
C) ATP
D) ADP and Pi
E) electron transport chain
Question 27
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.
Question 28
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?
Explain in at least four complete sentences.
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]