WorksheetsIB Biology 2.8 and 8.2
Total questions: 20
Worksheet time: 20mins
What is the most common energy currency in living organisms?
ATP + Pi
ATP
ADP
Pi
What kind of reaction takes place when ATP releases energy?
Pi
Condensation
Anabolic
Hydrolysis
Which of the following is not a reactant/reagent in cellular respiration?
C6H12O6
Energy
Glucose
Oxygen
Which of the following happens first in cellular respiration?
Electron Transport Chain
Formation of glycogen
Glycogenolysis
Glycolysis
Another name for glycolysis is...
Anaerobic cellular respiration
Krebs Cycle
Fermentation
Aerobic cell respiration
Why are hydrogen/electron carriers important?
They need energy.
They get oxidized and reduced
They help carry electrons and hydrogen to glucose.
They produce ATP through ETC.
What are the products of glycolysis?
Two FADH2 molecules
Two pyruvate molecules
Two CO2 molecules
Two Acetyl CoA molecules
Which of the following is true about glycolysis?
There is no energy produced in glycolysis
It only creates ATP, does not use ATP.
There is a net production of ATP and NADH
It makes the most ATP out of all the parts of cellular respiration
Aerobic cell respiration comprises the following steps...
Link reaction, Krebs cycle, and ETC
Cytochrome Q, ATP synthase, Oxidation
Calvin cycle
Fermentation, oxidation, and reduction
Why do we need oxygen for cellular respiration?
Oxygen gets oxidized at the end of cellular respiration to form water
Because the krebs cycle needs it
We need oxygen to breathe and it makes ATP
Oxygen gets reduced at the end of cellular respiration to form water
How many ATP are produced after one round of cellular respiration?
38
36
28
32
What will happen if oxygen did not get reduced in the final step of the ETC?
There would be a build up of protons in the matrix of the mitochondria
ADP would not be produced anymore
We would run out of glucose
ATP would not be produced anymore
When does fermentation occur?
When there is no oxygen for aerobic cell respiration
When there is no carbon dioxide for anaerobic cell respiration
When make pyruvate
When there is too many protons in the intermembrane space
What are the products of fermentation in plants and yeast?
Lactic acid and ethanol
NADH and FADH2
Ethanol and carbon dioxide
Oxygen and ATP
Why do we need to undergo cell respiration?
To oxidize ADP to NADH2 and FADH2
To sustain the supply of NAD+ inside the mitochondria.
To release the energy stored in chemical bonds in glucose
To prevent glucose from undergoing fermentation which results in the production of lactic acid
Lactic acid causes a burning sensation in our muscles when we exercise. What do you think the benefit of this is?
So that we can build new muscle and increase the amount of energy that is burned by the cell
So that we do not undergo photolysis of water and metabolism
So that the chemiosmotic mechanism of oxidative phosphorylation can stop
So that we rest and give our body a chance to give the cells in our body oxygen again
Which of the following is NOT a product of cellular respiration?
Pi
H2O
CO2
ATP
In which step of cellular respiration are the most hydrogen/electron carriers produced?
ETC
Calvin Cycle
Link reaction
Krebs Cycle
How does the ETC work?
Protons get pumped into the matrix of the mitochondria and ATP is made
Electrons drive a protein called ATP synthase
Water makes the ATP synthase reduce ADP and Pi to ATP
A proton gradient is created and it drives a protein called ATP synthase.
How comfortable do you feel with cellular respiration?
Below average
Average
Above average
very comfortable
