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Title: Biochemistry MCQs Glycolysis
Description: #Glycolysis is the process in which glucose is broken down to produce energy. It produces two molecules of pyruvate, ATP, NADH and water. The process takes place in the cytosol of the cell cytoplasm, in the presence or absence of oxygen. Glycolysis is the primary step of cellular respiration.#chemistry.
Description: #Glycolysis is the process in which glucose is broken down to produce energy. It produces two molecules of pyruvate, ATP, NADH and water. The process takes place in the cytosol of the cell cytoplasm, in the presence or absence of oxygen. Glycolysis is the primary step of cellular respiration.#chemistry.
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Biochemistry MCQs
Glycolysis
1
...
End products of the pentose shunt reenter glycolysis as:
(a) glucose 6-phosphate
(b) fructose 6-phosphate + glyceraldehyde 3-phosphate
(c) fructose 1,6 bisphosphate
(d) dihydroxyacetonephosphate
3
...
A coenzyme form of pantothenic acid is:
(a) lipoic acid
(b) coenzyme A (CoASH)
(c) TPP
(d) FAD
5
...
What is the net ATP yield for the conversion of one free glucose molecule to CO2
and H2O via glycolysis and the TCA cycle (assume the malate-aspartate shuttle was
used)?
(a) 12
(b) 15
(c) 36
(d) 38
7
...
What is the net ATP yield for the conversion of one molecule of acetyl CoA to CO2
and H2O via the TCA cycle?
(a) 12
(b) 15
(c) 24
(d) 30
9
...
How many CO2's are produced during one turn of the TCA cycle?
(a) 0
(b) 1
(c) 2
(d) 3
11
...
How many NADPH's are produced during one turn of the TCA cycle?
(a) 0
(b) 1
(c) 3
(d) 5
13
...
Citrate synthase and isocitrate dehydrogenase are two regulatory enzymes of the
TCA cycle
...
The glyoxylate cycle, in conjunction with the TCA cycle, accomplishes the:
(a) net conversion of lipid to carbohydrate
(b) complete oxidation of acetyl-CoA to CO2 plus reduced coenzymes
(c) allows for the complete oxidation of glucose
(d) produces NADPH and pentoses
16
...
Which of the following pathways is stimulated by glucagon?
(a) pentose shunt
(b) glycolysis
(c) gluconeogenesis
(d) TCA cycle
18
...
An example of gluconeogenesis is:
(a) conversion of glycogen to glucose
(b) conversion of glucose to glycogen
(c) conversion of lactic acid to glucose
(d) conversion of glucose to ribose 5-phosphate
20
...
The activated form of glucose for glycogen synthesis is:
(a) glucose 1-phosphate
(b) glucose 6-phosphate
(c) glucose 1,6 bisphosphate
(d) UDP-glucose
22
...
Which molecule is the immediate precursor of oxaloacetate formed during the
biosynthesis of glucose form lactic acid?
(a) acetyl CoA
(b) phosphoenolpyruvate
(c) pyruvate
(d) succinate
24
...
(b) As the electrons pass through the system, ATP is synthesized at three different
phosphorylation sites
...
(d) As the protons pass through the system, electrons are moved from the
mitochondrial matrix to the intermembrane space and ATP is formed as the electrons
move back to the matrix through only one phosphorylation site
...
Can ATP be formed by the electron transport system in the presence of cyanide?
(a) no
(b) yes
26
...
Oxidation of 1 mole of NADH by the electron transport system treated with 2,4
dinitrophenol would result in the formation of:
(a) 0 moles of ATP
(b) 1 mole of ATP
(c) 2 moles of ATP
(d) 3 moles of ATP
28
...
Almost all of the oxygen (O2) one consumes in breathing is converted to:
(a) carbon dioxide (CO2)
(b) carbon monoxide and then to carbon dioxide
(c) water
(d) none of the above
30
...
According to the chemiosmotic hypothesis, the driving force for ATP synthesis by
oxidative phosphorylation is:
(a) a gradient of sodium ions between the matrix and cytosol
(b) an intermediate containing a high energy bond which is coupled to ATP synthesis
(c) a conformational change in a protein which transfers the inorganic phosphate to
ADP
(d) a hydrogen ion (proton) gradient between the matrix and intermembrane space
32
...
Which of the following scientists developed the chemiosmotic hypothesis as to how
the electron transport system operates?
(a) Green
(b) Lehninger
(c) Mitchell
(d) Wilson
Title: Biochemistry MCQs Glycolysis
Description: #Glycolysis is the process in which glucose is broken down to produce energy. It produces two molecules of pyruvate, ATP, NADH and water. The process takes place in the cytosol of the cell cytoplasm, in the presence or absence of oxygen. Glycolysis is the primary step of cellular respiration.#chemistry.
Description: #Glycolysis is the process in which glucose is broken down to produce energy. It produces two molecules of pyruvate, ATP, NADH and water. The process takes place in the cytosol of the cell cytoplasm, in the presence or absence of oxygen. Glycolysis is the primary step of cellular respiration.#chemistry.