Document

advertisement
Name____________________________________ Course:_______________________
Choose the best answer for the following questions, and then tell why the answer
you choose is correct.
1. Glycolysis leads to the production of two:
a. Lactic acid, NADH, ATP
d. Pyruvate, NADH, ATP
b. Pyruvate, NAD+, ATP
e. FADH2, Pyruvate, NAD+
c. CO2 , Pyruvate, NAD+
_______________________________________________________________
_______________________________________________________________
2. During metabolism WHICH reaction proceeds in the absence of oxygen?
a. Glycolysis and ETS
c. Glycolysis and TCA cycle
b. Fermentation and the ETS
d. Glycolysis and Fermentation
_______________________________________________________________
_______________________________________________________________
3. Which is true of the intermediate step of metabolism?
a. CO2 and ATP are released during the process
b. A multienzyme complex removes a carboxyl group, transfers
electrons to NAD+, and attaches a coenzyme.
c. NAD+ is rejuvenated so glycolysis can continue
d. Lactate is produced to rejuvenate free NAD+
_______________________________________________________________
_______________________________________________________________
4. Which is the most important function of Glycolysis?
a. Production of NADH
b. Modification of Glucose
c. The production of ATP
d. The production of CO2
______________________________________________________________________________________________
______________________________________________________________________________________________
5. In the Chemiosmotic mechanism,
a. ATP production results from a proton gradient established by the
electron transport chain.
b. The difference in pH between the intermembrane space and the
cytosol drives the formation of ATP.
c. The energy released by the reduction and subsequent oxidation of
components of the electron transport chain is transferred as a
phosphate to ADP.
d. The production of water in the matrix by the reduction of oxygen
leads to a net flow of water out of the mitochondrion.
______________________________________________________________________________________________
______________________________________________________________________________________________
6. The main function of the TCA cycle is accomplished between which
stage?
a. Oxaloactetate and citrate
c. Citrate and Succinate
b. Isocitrate and Succinate
d. Succinyl CoA and Malate
______________________________________________________________________________________________
______________________________________________________________________________________________
7. Which enzyme of the TCA cycle has a dual role with the ETS and is
located in the inner membrane of the mitochondrion:
a. Pyruvate dehydrogenase
c. Fructose dehydrogenase
b. NADH Dehydrogenase
d. Cytochrome oxidase
c. Succinate Dehydrogenase
______________________________________________________________________________________________
______________________________________________________________________________________________
8. Fatty acids inter metabolism after they have been beta oxidized to form:
a. Carbon dioxide
c. Glucose
b. Acetyl groups
d. H2CO3
______________________________________________________________________________________________
______________________________________________________________________________________________
9. The only usable ATP is produced here in the TCA cycle?
a. Between Malate and Fumerate
b. Between Succinate and Fumerate
c. Between Succinyl Co-A and Succinate
d. Between Succinate and Fumerate
______________________________________________________________________________________________
______________________________________________________________________________________________
10. What is the terminal electron acceptor during mitochondrial respiration?
a. Water
c. Hydrogen
b. Oxygen
d. NADH
______________________________________________________________________________________________
______________________________________________________________________________________________
11. As a result of glycolysis, pyruvate oxidation and the citric acid cycle, only a
small portion of the energy of glucose has been converted to ATP. At this
point, the majority of the usable energy is contained in:
a. acetyl coenzyme A
b.
Pyruvate
c. NADH and FADH2
d. Water
______________________________________________________________________________________________
_____________________________________________________________________________________________
12. ATPs are synthesized in glycolysis and the TCA cycle by:
a. Oxidative Phosphorylation
c. Photophosphorylation
b. Substrate-level Phosphorylation d. Anabolism
______________________________________________________________________________________________
_____________________________________________________________________________________________
13. A product derived from pyruvate crosses the inner mitochondrion
membrane by which of the following methods?
a. Diffusion
c. Active Transport
b. Facilitated transport
d. All of the above
______________________________________________________________________________________________
_____________________________________________________________________________________________
14. Suppose the hexokinase activity was destroyed in the cell. Which of the
following will occur?
a. The cell will continue to produce ATP through the ETS
b. The cell will continue to produce ATP in the citric acid cycle
c. The cell will continue to produce ATP through Fermentation
d. The cell will stop producing ATP
______________________________________________________________________________________________
_____________________________________________________________________________________________
15. Dinitrophenol was once used as a component of diet pills for weight loss
however, users were dying due to its consumption because the drug
cause the inner mitochondrion membrane to become highly permeable
which prevented ATP synthesis. How?
a. After coenzymes dropped off electrons, they diffused into the
intermembrane space from the matrix
b. Electrons diffused from the matrix to the intermembrane space
c. Protons diffused from the intermembrane space to the matrix, bypassing ATPsynthase
d. Pyruvate is not allowed to enter the matrix
______________________________________________________________________________________________
_____________________________________________________________________________________________
16. Which of the following least support the contention that the
mitochondrion is a descendant of prokaryotes?
a. They have porins in their outer membranes
b. They have a diameter of .2 microns
c. They swim freely in the eukaryotic cells
d. They have circular chromosomes and 80s ribosomes
______________________________________________________________________________________________
_____________________________________________________________________________________________
17. The light reactions of photosynthesis occurs:
a. The stroma
c. The matrix
b. The thylakoid membrane
d. The stoma
______________________________________________________________________________________________
_____________________________________________________________________________________________
18. Which molecule binds to carbon dioxide to form a six-carbon sugar in the
Calvin Benson Cycle?
a. Ribulose Bisphosphate
c. Glyceraldehyde-3-phosphate
b. Citrate
d. Phosphoglyceraldehyde
______________________________________________________________________________________________
_____________________________________________________________________________________________
19. The Calvin-Benson Cycle occurs:
a. The stroma
c. The matrix
b. The thylakoid membrane
d. The stoma
______________________________________________________________________________________________
_____________________________________________________________________________________________
20. Which is not a product of Photosystem II?
a. NADPH
c. O2
b. ATP
d. All are products of Photosystem II
______________________________________________________________________________________________
_____________________________________________________________________________________________
21. CO2 required for carbon fixation, gets into the Calvin-Benson cycle
through which structure of the leaf?
a. The stroma
c. The matrix
b. The thylakoid membrane
d. The stroma
______________________________________________________________________________________________
_____________________________________________________________________________________________
22. How many pairs of electrons are removed in the TCA cycle?
a. 4
b. 5
c. 6
d. 12
______________________________________________________________________________________________
_____________________________________________________________________________________________
23. The reason that anaerobes can produce a maximum of 38 ATPs from a
molecule of glucose while aerobes can only produce 36 is because:
a. Anaerobes do not lose two ATPs in glycolysis
b. Anaerobes do not have an ETS
c. Anaerobes do not undergo oxidative phosphorylation
d. Anaerobes produces an extra FADH2 during the TCA cycle
______________________________________________________________________________________________
_____________________________________________________________________________________________
24. During glycolysis, ATP are synthesized by:
a. substrate-level phosphorylation
b. oxidative phosphorylation
c. photophosphorylation
d. all of the above
______________________________________________________________________________________________
_____________________________________________________________________________________________
25. Cyanide is a poison that blocks the passage of electrons along the
electron transport chain. Which of the following is a metabolic effect of
this poison?
a. The pH of the intermembrane space is much lower than normal
b. Electrons are passed directly to oxygen, causing cells to explode.
c. Alcohol would build up in the cells
d. NADH supplies would be exhausted, and ATP synthesis would
cease.
e. No proton gradient would be produced, and ATP synthesis would
cease.
______________________________________________________________________________________________
_____________________________________________________________________________________________
Download