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WorksheetsCellular Respiration
Total questions: 75
Worksheet time: 39mins
True or False: Glycolysis occurs in both anaerobic and aerobic organisms
True
False
What us the correct order of cellular respiration?
Glycolysis, oxidation of pyruvate, Krebs Cycle, electron transport chain and chemiosmosis
Glycolysis, Krebs cycle, oxidation of pyruvate, electron transport chain and chemiosmosis
Electron transport chain and chemiosmosis, glycolysis, oxidation of pyruvate, Krebs cycle,
Glycolysis, electron transport chain and chemiosmosis, Krebs cycle, oxidation of pyruvate
What happens if your body does not have enough oxygen during a workout?
All cells will undergo apoptosis
Cells will begin lactic acid fermentation
Cells will continue with cellular respiration
Cells will begin photosynthesis
What is the purpose of cellular respiration?
To make ATP and remove excess carbon dioxide
To make NADH and FADH
To make glucose
To release stored energy from glucose and make it available to the body
Where does glycolysis take place?
Outer mitochondrial membrane
Cristae membrane
Cytoplasm
Mitochondrial matrix
Where does the Krebs Cycle take place?
outer mitochondrial membrane
mitochondrial matrix
cristae membrane
cytoplasm
Where do the electron transport chain and chemiosmosis take place?
cytoplasm
cristae membrane
mitochondrial matrix
outer mitochondrial membrane
How is the majority of ATP produced during cellular respiration ?
Oxidative phosphorylation
Substrate level phosphorylation
What process(es) produce ATP through substrate level phosphorylation?
Glycolysis
Krebs Cycle
Electron transport chain
Chemiosmosis
What process(es) are associated with oxidative phosphorylation?
Glycolysis
Krebs Cycle
Electron Transport Chain
Chemiosmosis
What is the final electron acceptor in the electron transport chain?
Water
Oxygen
Hydrogen
ATP
How many times does the Krebs cycle turn for each glucose?
1/2
1
2
4
True or False: The electron transport chain couples an exergonic reaction with an endergonic reaction.
True
False
True or False: The electron transport chain does not consist of cytochromes.
True
False
True or False: Oxygen is very electropositive.
True
False
True or False: Glucose reacts easily with other molecules
True
False
How many binding sites does ATP synthase have?
1
2
3
4
Which of the following are other terms for the Krebs Cycle?
Gycolysis
Citric acid cycle
Chemiosmosis
tricarboxylic acid cycle (TCA)
How many ATP are used in glycolysis?
1
2
3
4
How many ATP are made in glycolysis?
1
2
3
4
How many ATP are made in the Krebs Cycle?
1
2
3
4
Approximately how many ATP are made in oxidative phosphorylation?
2
4
16
28
About how many ATP are made through cellular respiration in total?
2-4
16-20
32-34
64-68
What is the purpose of oxygen in cellular respiration?
Oxygen is a catalyst for reactions
Oxygen is an electron carrier
Oxygen is not necessary for cellular respiration
Oxygen is the final electron acceptor
What is pyruvate converted to in lactic acid fermentation?
Lactic acid (lactate)
Lactic acid and CO2
ethyl alcohol
ATP
What us pyruvate converted to in alcohol fermentation?
Ethyl alcohol (ethynol)
Ethyl alcohol and CO2
Lactic acid
ATP
Who discovered the Citric Acid Cycle? (Krebs Cycle)
Hans Krebs
Marie Curie
Alfred Hershey and Martha Chase
Reiji Okazaki
How many pyruvates are made from 1- 6 carbon glucose molecule after glycolysis?
1-6 carbon pyruvate
2-3 carbon pyruvates
3-2 carbon pyruvates
2-4 carbon pyruvates
True or False: The electron transport chain couples an exergonic reaction with an endergonic reaction.
True
False
Energy stored in food is expressed in units of ________.
Grams
Kilocalories
Jules
Calories
The amount of energy needed to raise the temperature of one gram of water, one degree Celsius is
one kilocalorie
one thousand calories
one calorie
one thousand kilocalories
True or False: The energy stored in all macromolecules is the same.
True
False
What is the overall equation for cellular respiration?
C6H12O6+6O2
= 6CO2+6H2O+ (36-38) ATP
C6H12O6+6O2
= 12CO2+12H2O+ (36-38) ATP
6CO2+6H2O
=C6H12O6+6O2+(36-38) ATP
C6H12O6+6O2+ (36-38) ATP
= C6H12O6+6O2
Why is the Krebs Cycle considered an aerobic process?
It uses oxygen
It is not an aerobic process
It relies on another process (the ETC) that does require oxygen
It can use oxygen if it is available but oxygen is not required for glycolysis
What processes can occur in the absence of oxygen?
Glycolysis
The ETC and chemiosmosis
Lactic Acid Fermentation
Alcohol Fermentation
The Krebs Cycle
What are the correct inputs and outputs for glycolysis?
Input: 2 glucose, 2 ATP, 4 NAD+
Output: 2 pyruvates, 4 ATP, 2NADH
Input: 1 glucose, 2 ATP, 3NAD+
Output: 4 pyruvates, 4 ATP, 3NADH
Input: 2 glucose, 4 ATP, 2 NADH
Output: 4 pyruvates, 2 ATP, 2 NAD+
Input: 1 glucose, 2 ATP, 2 NAD+
Output: 2 pyruvates, 4 ATP, 2 NADH
Why is it known as the "Citric Acid Cycle"?
Hans Krebs felt it was an appropriate name
The mitochondrial matrix is acidic
Citric acid is the last product of glycolysis
Citrate (Citric acid) is the first compound created in the cycle
Where do NADH and FADH2 ultimately "drop off" their high energy electrons?
The electron transport chain
Glycolysis
Chemiosmosis
The Krebs Cycle
What are the products of the Krebs Cycle? (per glucose molecule)
2 ATP, 2 FADH2, 4 CO2, 6 NADH
4 ATP, 6 FADH2, 2 CO2, 6 NADH
6 ATP, 4 FADH2, 6 CO2, 2 NADH
2 ATP, 4 FADH2, 8 CO2, 8 NADH
True or False: Anabolic processes construct molecules using energy while catabolic processes break down molecules to to release energy.
True
False
What are the inputs for the Krebs Cycle?
4 CO2, 6NAD+, 2FADH 2 ADP
6 NAD+, 2 FAD, 6 ATP, 4 Acetyl CoA
2 Acetyl CoA, 6 NAD+, 2 FAD, 2 ADP
4 NADH. 4 FADH, 12 ATP, 2 Acetyl CoA
What type of macromolecule is ATP?
Nucleic Acid
Carbohydrate
Protein
Lipid
What is this?
ATP
Acetyl Coenzyme A
ATP synthase
Coenzyme Q
When NADH is _______ it becomes NAD+
Oxidized
Reduced
When FADH2 is _______ it becomes FAD
Oxidized
Reduced
When NAD+ is _______ it becomes NADH
Oxidized
Reduced
When FAD is _______ it becomes FADH2
Oxidized
Reduced
Cellular respiration is __________.
Exergonic
Endergonic
Neither exergonic nor endergonic
It depends
How many carbons does glucose have?
2
4
6
8
How many carbons does pyruvate have?
2
3
6
9
What step(s) do not produce ATP?
Glycolysis
Oxidation of pyruvate
Krebs Cycle
ETC and Chemiosmosis
When pyruvate is oxidized it becomes ______.
Oxaloacetate
Acetyl CoA
Glucose
Citrate
The oxidizing agent is _______
Oxidized
Reduced
Nothing happens to the oxidizing agent
It depends on the reaction
The reducing agent is
Oxidized
Reduced
Nothing happens to the reducing agent
It depends on the reaction
The reducing agent ______.
Gains electrons
Loses electrons
The oxidizing agent _____.
Gains electrons
Loses electrons
When something is oxidized it ______.
Gains electrons
Loses electrons
When something is reduced it _______.
Gains electrons
Loses electrons
When something is oxidized it ______.
Gains electrons
Loses electrons
True or False: Membrane potential is the difference in electric potential between the interior and the exterior of a cell or organelle
True
False
What is the starting molecule for glycolysis?
Glucose
Pyruvate
Acetyl CoA
Oxaloacetate
What enzyme catalyzes phosphorylation?
Kinase
Fumarase
Citrate synthase
Aldolase
True or false: The mitochondria has only one membrane.
True
False
How many membranes does the mitochondria have?
1
2
3
4
What is H2O a byproduct of?
Oxidative phosphorylation
Glycolysis
Krebs Cycle
The oxidation of pyruvate
What is respiratory quotient (RQ)?
The amount of carbon dioxide produced in cellular respiration
The amount of carbon dioxide consumed prior to cellular respiration
The difference between the carbon dioxide consumed and the carbon dioxide produced
The ratio of carbon dioxide produced to oxygen consumed
True or False: The energy value of lipids is about twice as much as that of carbohydrates.
True
False
This diagram shows how glucose can be used to produce ATP without the use of oxygen. Which compounds are represented by each letter?
X: ethanol Y: pyruvate Z: lactate
X: lactate Y: ethanol Z: pyruvate
X: pyruvate Y: ethanol Z: lactate
X: pyruvate Y: lactate Z: ethanol
True or False: Dehydrogenation is the reverse of decarboxylation
True
False
What is decarboxylation?
The removal of a carbon
The removal of a carboxyl group
The addition of oxygen and a carbon
The addition of a carboxyl group
What is dehydrogenation?
The removal of hydrogen
The addition of hydrogen
The removal of a carboxyl group
The addition of carbon
How many carbons does oxaloacetate have?
1
2
4
6
How many carbons does citrate have?
1
2
4
6
How many carbons does oxaloacetate have?
1
2
4
6
What pumps H+ ions into the intermembrane space?
ATP synthase
The electron transport chain
NADH
ATP
