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WorksheetsBIOL 1140 Exam #4
Total questions: 40
Worksheet time: 20mins
Why do our cells do cellular respiration?
To allow glucose to enter the cell
To send insulin signal into the blood
To store energy that the cell can use
To release energy that the cell can use
Glucose has _____ potential energy compared to CO2
less
more
equal
When you reduce something,
You give it electrons
You remove electrons from it
You add a phosphate to it
You split it in half
Which stage of cellular respiration occurs in the cytoplasm without needing oxygen?
Pyruvate Oxidation
Krebs Cycle
Glycolysis
Oxidative Phosphorylation
In steps 1 and 2 of glycolysis, where do we get the phosphates from?
From ATP
From inorganic phosphates
From NADH
From FADH2
In step "P" of FORP, where do we get the phosphates from?
From ATP
From inorganic phosphates
From NADH
From FADH2
P-3C-P and P-3C-P can be represented by
A hotdog with mustard on both ends
2 hotdog halves with mustard ends bitten off
2 hotdog halves with mustard on both ends
2 hotdog halves with mustard on one end
In step 5a of glycolysis, we remove 1P from each molecule. Where do these P go?
To the electron transport chain
To NAD+ to make NADH
To the cytoplasm to be inorganic phosphates
To ADP to make ATP
How many net ATP do we make from glycolysis?
2
4
none
26-32
What are the inputs for pyruvate oxidation?
2 x 2C fragments
2 x Acetyl CoA
2 x pyruvate
NADH and FADH2
What does the first R in RORA stand for?
Reduce: NAD+ is reduced to NADH
Reduce: ADP is reduced to ATP
Release: CO2 is released from pyruvate
Release: Phosphate is released from pyruvate
What does the second R in RORA stand for?
Reduce: 2C fragment is reduced to Acetyl CoA
Reduce: NAD+ is reduced to NADH
Release: CO2 is released from pyruvate
Release: 2C fragment is released from pyruvate
How many net ATP is made from pyruvate oxidation?
2
4
none
26-32
What is the final molecule of pyruvate oxidation? (this molecule will be the input for citric acid cycle)
Acetyl CoA
Pyruvate
2C fragment
NADH
Where in the cell does the citric acid cycle occur?
The cytoplasm
The mitochondrial matrix
The mitochondrial inner membrane
The mitochondrial intermembrane space
This is a mitochondria. The green arrow is pointing to the _____ and the pink arrow is pointing to the _____.
outer membrane, inner membrane.
intermembrane space, outer membrane.
intermembrane space, inner membrane.
inner membrane, intermembrane space.
How many times does the citric acid cycle happen per 1 glucose molecule?
1
2
4
5
What are the products of citric acid cycle?
ATP, CO2, NADH, FADH2
ADP, CO2, NADH, FADH2
CO2, NADH, FADH2. no ATP made
2 x Acetyl CoA
What is the purpose of making electron carriers in cellular respiration?
They give electrons to ADP-> ATP
They get rid of excess electrons
They drop off electrons at citric acid cycle
They drop off electrons at ETC
Where does the electron transport chain sit in the mitochondria?
The intermembrane space.
The matrix.
The inner membrane.
The outer membrane.
The pink arrow is pointing to the _____, and the green arrow is pointing to the _____.
inner membrane, outer membrane.
matrix, inner membrane.
intermembrane space, inner membrane.
intermembrane space, outer membrane.
Which steps of Oxidative Phosphorylation involve the ETC structure?
Move, Diffuse
Move, Pump
Diffuse, Make
Pump, Diffuse
Which area of the mitochondria will have a larger concentration of H+ during oxidative phosphorylation?
The intermembrane space
The matrix
During MOVE,
electrons are dropped off at ETC and go from protein complex to protein complex.
H+ ions are dropped off at ETC and go from protein complex to protein complex.
electrons move from matrix to intermembrane space.
H+ ions move from matrix to intermembrane space.
During PUMP,
electrons are pumped from matrix to intermembrane space.
H+ ions are pumped from matrix to intermembrane space.
electrons are pumped from intermembrane space to matrix.
H+ ions are pumped from intermembrane space to matrix.
During DIFFUSE,
electrons diffuse up through ATP synthase.
H+ ions diffuse up through ATP synthase.
electrons diffuse down through ATP synthase.
H+ ions diffuse down through ATP synthase.
During MAKE,
The reaction ATP-P= ADP occurs.
The reaction ADP+P= ATP occurs.
During the in-class activity of Oxidative Phosphorylation, what represented the electrons from NADH and FADH2?
Note cards
Ping-pong balls
Poster board tube
They were drawn in chalk.
NADH drops its e- at protein complex __, while FADH2 drops its e- at protein complex __.
I, III
III, I
I, IV
I, II
This is a mitochondria with an added ETC. Which arrow points to the area that will have a higher concentration of H+?
White
Black
How many net ATP is made from Oxidative Phosphorylation?
2
4
none
26-32
Why is oxygen crucial for oxidative phosphorylation?
It stimulates the mitochondrial membrane, allowing CO2 to be released.
It diffuses through ATP Synthase, causing ATP to be made.
E- are drawn towards it, and is the final e- acceptor.
It moves down the ETC to allow protein complexes to pump.
Why is cyanide poisonous?
It blocks your airways from getting O2 into the lungs.
It blocks airways from releasing CO2 as a waste product.
It interferes with the ETC and oxidative phosphorylation by blocking protein complex IV.
It prevents blood from reaching all body tissues.
What do some cells do for energy when there is no oxygen present?
Nothing, they die instantly.
Fermentation.
Cellular Respiration.
Citric Acid Cycle.
If there is no oxygen present, where in the cell will we extract energy from food?
The mitochondria
The golgi apparatus
The cytoplasm
The cell membrane
In both types of fermentation,
Step 1 is just glycolysis
Step 1 is citric acid cycle without oxygen
Step 2 needs the electron transport chain
Step 2 involves making few ATP
In alcohol fermentation,
Ethanol is converted to pyruvate
Lactic acid is converted to pyruvate
Pyruvate is converted to ethanol
Pyruvate is converted to lactic acid
In lactic acid fermentation,
Pyruvate is converted to lactic acid
Lactic acid is converted to pyruvate
Ethanol is converted to pyruvate
Pyruvate is converted to ethanol
Which of the following is necessary for fermentation?
Electron Transport Chain
Mitochondria
Glycolysis
O2 in environment
Products that used alcohol fermentation typically have _____, while products that used lactic acid fermentation typically have _____.
sour taste, bubbles/air pockets
bubbles/air pockets, sour taste
