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WorksheetsCellular Respiration
Total questions: 50
Worksheet time: 29mins
The final electron acceptor in electron transport chain is
NAD+
FAD
Oxygen
Water
This process uses NADH and FADH2 to produce ATP
fermentation
glycolysis
krebs cycle
oxidative phosphorylation
How many ATP molecules are produced during complete breakdown of glucose in a liver cell?
34
36
38
39
Glycolysis is a metabolic pathways that
I. Produces ATP
II. Produces NAD+
III. Produces pyruvate
IV. Occurs in cytoplasm
I, II, III
I, II, IV
I, III, IV
I, II, III, IV
___________ will cleave the hexose into two molecules of triose.
Hexokinase
Glucokinase
Aldolase
Enolase
________ molecules of ATPs are invested and total ________ molecules of ATPs are formed in the end of glycolysis.
One; two
Two; four
Two; two
Four; four
Reaction to convert phosphoenolpyruvate to pyruvate is highly exergonic that produces
ATP
GTP
Water
Carbon dioxide
Where does the link reaction take place
inner mitochondrial membrane
cytoplasm
mitochondrial matrix
ribosome
The products of the link reaction are
pyruvate and carbon dioxide
carbon dioxide and co-enzyme A
carbon dioxide, acetyl coA and NADH
NADH and carbon dioxide
The product of Krebs Cycle is (more than one answer)
ATP
NADH
FADH2
CO2
pyruvate
Several times during the cycle, an H atom is removed from one of the organic intermediate molecules and broken down into an H+ ion and a high energy electron. This process is called:
oxidation
reduction
decarboxylation
metabolism
dehydration
How does the Krebs cycle allow for ATP synthesis?
The rotation of the Krebs cycle turns a "rotor" in the cell to synthesize ATP
ATP is synthesized by substrate level phosphorylation during the removal of the coenzyme A upon entrance into the cycle
Krebs cycle completes the breakdown of glucose to release the energy and store it in the form of ATP
High energy electrons are stored in NADH and FADH2 to shuttle to the ETC to generate a proton gradient
What is the first step of the Krebs cycle?
acetyl CoA combines with the four carbon compound to create a six carbon compound
CO2 is released from a six carbon compound to form a five carbon compound
CO2 is released from a five carbon compound to form a four carbon compound
A four carbon compound is transformed and ready to accept another acetyl CoA
Which substance is represented by X?
NADH
FADH2
CO2
ATP
H+
Which of these "hydrogen carrier" compounds are a source of high energy electrons? Select all that apply.
FAD
FADH2
NAD+
NADH
The Krebs cycle requires oxygen because...
Without oxygen, NADH cannot be oxidized to continue receiving electrons as NAD+
Without oxygen coenzyme A is unable to be added to the pyruvate molecule to make acetyl CoA
Without oxygen ATP cannot be synthesized by substrate level phosphorylation
Without oxygen glycolysis cannot take place to provide the starting materials for the Krebs cycle
What is the difference between NADH and FADH2?
Both are electron carriers, FADH2 occurs in the Krebs cycle and NADH occurs in glycolysis
Both are electron carriers, NADH occurs in the Krebs cycle and FADH2 occurs in glycolysis
Both are electron carriers, FADH2 holds higher energy electrons
Both are electron carriers, NADH holds higher energy electrons
In one turn of the cycle, how many of the products are formed?
1 ATP, 2 NADH, 2 FADH2, 1 CO2
1 ATP, 3 NADH, 1 FADH2, 2 CO2
2 ATP, 2 NADH, 1 FADH2, 1 CO2
2 ATP, 3 NADH, 2 FADH2, 2 CO2
Predict the effect of an inhibitor that stops the oxidation of NADH or FADH2.
Increase of cellular respiration; more ATP is synthesized
Decrease of cellular respiration; more ATP is synthesized
Increase of cellular respiration; less ATP is synthesized
Decrease of cellular respiration; less ATP is synthesized
How many C atoms does acetyl CoA contain?
1
2
3
4
The removal of carbon from a molecule in the form of carbon dioxide is known as
decarboxylation
dehydrogenation
phosphorylation
oxidation
In which step, FADH2 produced?
Step 1: Condensation
Step 6: Oxidation
Step 2: Isomerization
Step 8: Oxidation
In which step does Fumarate convert to Malate?
Step 8: Oxidation
Step 6: Oxidation
Step 1: Condensation
Step 7: Hydation
In the link reaction, pyruvate is converted to Acetyl-
CoA. During this process, what happens to NAD?
It is hydrolyzed
It is oxidized
It is reduced
It is phosphorylated
For each turn of the Krebs cycle, how many molecules of reduced NAD are produced?
(a)
What is produced as a result of anaerobic respiration in mammals?
Lactic acid
ATP
Acetic Acid
Oxygen
The benefit of anaerobic respiration while sprinting is that ATP can be supplied very _____ as oxygen is _____ required.
rapidly; not
slowly; not
rapidly, always
slowly; always
What are the products of anaerobic respiration in plants and yeast?
Lactic Acid and Carbon Dioxide
Carbon Dioxide and Energy
Ethanol and Energy
Ethanol and Carbon Dioxide
If oxygen is present, the Kreb's cycle occurs in the _______?
Cytoplasm
Matrix
Inner Membrane
Chloroplast
Where does the Electron Transport Chain take place?
Cytoplasm
Matrix of Mitochondria
Inner membrane of the Mitochondria
Chloroplast
Fermentation
Glycolysis
Krebs Cycle
ETC
Which of the following happen during the Electron Transport Chain?
High energy electrons travel down the ETC, pumping H+'s into the intermembrane space
H+'s travel down the ETC, pumping high energy electrons into the intermembrane space
H+'s diffuse through ATP Synthase, turning it so it can make ATP
During ETC, H+ diffuses through what protein to make ATP?
Chlorophyll
ATP Synthase
Cytochrome c
ATPase
How many molecules of carbon dioxide are produced in cellular respiration?
1
2
6
12
Choose the components of ATP.
i) Adenine
ii) Ribose
iii) Guanine
iv) Phosphate
i, ii and iii
i, ii and iv
ii, iii and iv
ii and iv only
ATP synthase is found on the _______________________ of mitochondria.
matrix
inner membrane
outer membrane
intermembrane space
At which stages are hydrogen atoms transferred to NAD+?
1, 4 and 6
2, 3 and 7
3, 4 and 8
5, 7 dan 8
Which stages are involved in decarboxylation?
1 only
3 and 4
5 only
6, 7 and 8
