Download Cell Respiration Practice Packet

1. Why is cellular respiration called an aerobic process?
2. What happens during glycolysis?
3. What happens to the molecules of glycolysis when oxygen is available?
4. Where is the electron transport chain located?
Define the words in the boxes. On the line across each arrow, write a phrase that describes how the words in the boxes
are related to one another.
Fill in the blank:
Virtually all forms of life depend on a molecule know as
produce this during
as their primary energy source. Plants
, but plants and all other organisms can also produce ATP through chemical
pathways that degrade food molecules. The main sugar using pathway requires free oxygen and is called
___
_______ .
There are three stages of aerobic respiration. In the first stage,
is partial degraded to
. By the end of the second stage, which includes the
has been completely degraded to carbon dioxide and
cycle, glucose
. Neither of the first two stages produce much
Label each item that has a box or a line.
True or False: Write true if the statement is true or false if the statement is false.
______ All organisms on earth will die without a constant supply of oxygen.
______ Energy released during the breakdown of cells is used to synthesize ATP.
______ The energy released from the breakdown of glucose can be used to recharge ATP.
______ When you exhale, carbon dioxide is a released.
______ When glucose is broken down during cellular respiration, a product is light energy.
______ In eukaryotic cells, glycolysis occurs in the mitochondrion.
______ All ATP synthesis in a eukaryotic cell happens in the mitochondria.
______ Carbon dioxide is a product of both cellular respiration and photosynthesis.
______ An electron transport chain is the first step/stage in cellular respiration.
______ You are considered a heterotroph because you make your own food.
______ Only fats are used as the energy source for glycolysis.
______ Glucose gets anabolically made during glycolysis.
______ One of the final products of glycolysis is a five-carbon compound.
______ Oxygen is the most abundant component of the earth’s atmosphere.
______ Aerobic respiration evolved before oxygenic photosynthesis.
______ In eukaryotic cells, if oxygen is present, then pyruvate is fermented to ethanol.
______ The citric acid cycle occurs in the cytoplasm.
______ CO2 is produced during the Citric Acid Cycle.
______ NADH is formed to help maintain homeostasis.
______ The inner mitochondrial membrane increases the surface area of the membrane.
______ NADH donates electrons to the electron transport chain in mitochondria.
Multiple Choice. Choose the best answer for each question and either circle or highlight to show your
choice.
1) Cows need to breathe because
A) they need carbon dioxide from the air for cellular respiration.
B) they need oxygen from the air for cellular respiration.
C) they need to expel methane, a waste product of cellular respiration, from their lungs.
D) they need to expel nitrogen gas, a waste product of cellular respiration, from their lungs.
2) Glycolysis would quickly halt if that process ran out of
electron acceptor.
A) NADP+
B) ADP
, which serves as the hydrogen and
C) NAD+
3) The ultimate electron acceptor in aerobic respiration is
A) NADH
B) Carbon dioxide
C) Oxygen
4) In mammals, oxygen gas diffuses from the air into the bloodstream via the
A) cells lining the nose.
C) liver.
B) kidney.
D) lungs.
D) H2O
D) ATP
5) In the chemical reaction of glycolysis, the reactants include;
A) Glucose, NAD, ATP.
C) light energy and heat.
B) Glucose, NADH
D) Hydrogen, water, heat
6) Organisms that are producers (such as plants)
A) Are only heterotrophs
C) Are capable of both auto and heterotrophy processes
B) Are only autotrophs
D) None of these.
7) A typical eukaryotic cell that would have the greatest amount of mitochondria would be.
A) liver
B) muscle
C) fat
D) skin
8) In cellular respiration, carbon dioxide is released
A) during the first half of glycolysis.
B) during the Citric Acid Cycle.
C) during the ETC.
D) none of the above
9) One of the products of glycolysis is
A) GTP.
B) glycogen.
C) starch.
D) none of the above
10) The net yield of ATP from the breakdown of a single molecule of glucose is…
A) 2.
B) 0.
C) 4.
D) 1.
11) The function of oxygen in the ETC is
A) to accept electrons that have passed through the ETC of the mitochondria.
B) to combine with carbon dioxide and be excreted.
C) to donate electrons to the ETC.
D) all of the above
12) An electron transport chain that produces ATP is part of both the cellular respiration process and
A) glycolysis.
C) photosynthesis.
B) fermentation.
D) the Krebs cycle.
13) Which of the following is a product of the Krebs cycle?
A) carbon dioxide
B) oxygen
C) lactic acid
D) glucose
14) Which of the following is best shown by the diagram to the right?
A) glycolysis
B) diffusion
C) the Krebs cycle
D) electron transport chain
15) ATP is a compound that is synthesized when which occurs?
A) Chemical bonds between carbon atoms are formed in photosynthesis.
B) Energy stored in chemical bonds is released during cellular respiration.
C) Energy stored in nitrogen is released forming amino acids.
D) Digestive enzymes break amino acids into smaller parts.
16) Which step is the same in both forms of fermentation, as well as in cellular respiration?
A) formation of carbon dioxide and alcohol
B) formation of carbon dioxide and water
C) breakdown of pyruvic acid
D) breakdown of glucose
Use the word bank to fill in the flow chart on the process of cellular respiration.
Cellular Respiration
WORD BANK
1 ATP per pyruvate
2 ATP
~30 ATP
0 ATP
Electron transport chain
Mitochondrion
Cytoplasm
Fermentation
Glycolysis
Glucose
Pyruvate
Lactic acid
Kreb's Cycle
Aerobic Respiration
Anaerobic respiration
When oxygen
is not
present
Begins
With a
molecule
of
Which
is
broken
down
during
Occurs
in the
Which
Produces
Which
Creates 2
molecules
of
When
oxygen is
present
Occurs in
the
Such as
Which
Produces
Which starts
with
And ends
with
Which
makes
Which
makes