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CELLULAR RESPIRATION

Total questions: 40

Worksheet time: 29mins

Name
Class
Date
1.
What is one of the reactants of cellular respiration?
a)
energy
b)
glucose
c)
carbon dioxide
d)
water
2.
In which way are photosynthesis and cellular respiration different?
a)
Cellular respiration stores ATP, while photosynthesis releases ATP.
b)
Cellular respiration produces oxygen, while photosynthesis uses oxygen.
c)
Photosynthesis releases energy, while cellular respiration stores energy.
d)
Photosynthesis used carbon dioxide, while cellular respiration produces carbon dioxide.
3.
Where does glycolysis take place in cells?
a)
Cytoplasm
b)
Mitochondrion
c)
Endoplasmic Reticulum
d)
Ribosomes
4.
Glycolysis results in the net gain of:
a)
2 ATP
b)
4 ATP
c)
4 NADH
d)
2 Acetyl CoA
5.
In the final step of glycolysis ATP is made through the process of:
a)
Substrate Level Phosphorylation
b)
Oxidative Phosphorylation
c)
Photo-Phosphorylation
d)
RedOx Reactions
6.
Which molecule is an isomer of Glyceraldehyde-3-Phosphate (G3P)?
a)
DHAP
b)
PEP
c)
Pyruvic Acid
d)
1,3 BPG
7.
Before entering Krebs Cycle, pyruvate is:
a)
Oxidized
b)
Reduced
c)
Isomerized to Acetyl-CoA
d)
Phosphorylated
8.

Hydrogen ions are pumped from the __________ to the ___________.

a)

matrix; intermembrane space

b)

intermembrane space; matrix

c)

matrix; cytoplasm

d)

intermembrane; cytoplasm

9.

The final electron acceptor in electron transport chain is

a)

NAD+

b)

FAD

c)

Oxygen

d)

Water

10.

H+ move down their concentration gradient by ___________ back into the matrix.

a)

osmosis

b)

facilitated diffussion

c)

simple diffusion

d)

active transport

11.

This process uses NADH and FADH2 to produce ATP

a)

fermentation

b)

glycolysis

c)

krebs cycle

d)

oxidative phosphorylation

12.
The ETC makes water.  To make this water, where do the hydrogen atoms come from?
a)
glucose
b)
pyruvate
c)
NADH and FADH2
d)
oxygen
13.
How many carbons are in glucose?
a)
2
b)
4
c)
6
d)
8
14.
What are the net outputs of glycolysis?
a)
2 ATP, 2 NADH, 3 Pyruvate
b)
3 ATP, 2 NADH, 3 Pyruvate
c)
2 ATP, 2 NADH, 1 Pyruvate
d)
2 ATP, 2 NADH, 2 Pyruvate
15.
How many carbons are in pyruvate?
a)
1
b)
2
c)
3
d)
4
16.
Where does the Citric Acid Cycle (Krebs Cycle) happen in the cell?
a)
Cytosol
b)
Inner Mitochondrial Membrane
c)
Cell Membrane
d)
Mitochondrial Matrix
17.
How many carbons are in Acetyl-CoA
a)
1
b)
2
c)
3
d)
4
18.
Where is the Electron Transport Chain in the cell?
a)
Cytoplasm
b)
Cell Membrane
c)
Inner Mitochondrial Membrane
d)
Mitochondrial Matrix
19.
What is the function of NAD+?
a)
It absorbs light
b)
It is an electron carrier
c)
It is a light-reflecting pigment
d)
It acts as long-term energy storage
20.

Oxidation is the ____ and reduction is the _____.

a)

gain of electrons...loss of electrons

b)

loss of electrons.... gain of electrons

c)

loss of oxygen...gain of oxygen

d)

gain of oxygen...loss of oxygen

21.

The end products of the KREBS cycle include all of the following except

a)

carbon dioxide

b)

pyruvic acid

c)

ATP

d)

NADH

22.
______________ produces the most ATP.
a)
photosnthesis
b)
aerobic respiration
c)
anaerobic respiration
d)
glycolysis
23.

Under anaerobic conditions yeast release

a)

oxygen

b)

carbon monoxide

c)

lactic acid

d)

ethyl alcohol

24.
What is the function of NAD+?
a)
It absorbs light
b)
It is an electron carrier
c)
It is a light-reflecting pigment
d)
It acts as long-term energy storage
25.

Which of the following occurs in the cytosol of the cell?

a)

Glycolysis and Fermentation

b)

Fermentation and Chemiosmosis

c)

Oxidation of Pyruvate to Acetyl CoA

d)

Krebs Cycle

26.

The first enzymes that convert glucose into glucose-6-P are

a)

Hexokinase

b)

PFK1

c)

Phosphofructokinase

d)

Aldolase

27.

Structure E is _____.

a)

FAD

b)

ATP

c)

NAD+

d)

CO2

28.

The number of ATP molecules produced out of Krebs Cycle is:

a)

2

b)

3

c)

4

d)

0

29.
Lactic acid fermentation occurs in your muscles after a workout because your cells are struggling to get...
a)
Glucose
b)
Sunlight
c)
Oxygen
d)
Water
30.
How are lactic acid and alcoholic fermentation similar?
a)
They have the same products
b)
They have the same reactants
c)
They both require oxygen
d)
They occur in the same organisms
31.

Which of the following reactions below involve oxidative decarboxylation?

I.                Isocitrate to α-ketoglutarate 

II.             Succinyl CoA to succinate

III.          α-ketoglutarate to succinyl CoA 

IV.          Succinate to fumarate

a)

I and III 

b)

II and IV   

c)

  II and III

d)

I, III and IV

32.

Which of the following is a major source of electrons for the electron transport chain?

a)

H2O

b)

ATP

c)

NADH

d)

O2

33.

The energy released by the electron transport system produces ATP by _____.

a)

redox reaction

b)

oxidative phosphorylation

c)

photophosphorylation

d)

substrate-level phosphorylation

34.
How many membranes does a mitochondria have?
a)
1
b)
2
c)
3
d)
4
35.
Which of the three steps of cellular respiration is anaerobic?
a)
Glycolysis
b)
Citric Acid Cycle
c)
Kreb's Cycle
d)
Electron Transport Chain
36.

Which of the following is NOT a stage of cellular respiration?

a)

Glycolysis

b)

Fermentation

c)

Krebs cycle

d)

Electron transport

37.
What does ATP synthase do?
a)
Create ATP in chemiosmosis.
b)
Break down ATP in chemiosmosis.
c)
Break down NADPH. 
d)
Create NADPH.
38.
Which passes high energy electron into the electron transport chain
a)
NADH & FADH2
b)
ATP & ADP
c)
citric acid
d)
acetyl CoA
39.
Which process releases the most Carbon Dioxide?
a)
Chemiosmosis
b)
Krebs Cycle
c)
Electron Transport Chain
d)
Glycolysis
40.
How many FADH2 molecules are produced by 1 turn of the Krebs Cycle?
a)
1
b)
2
c)
3
d)
4

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