16. Consider the overall chemical reaction for cellular respiration.
CHO,+ 604 GCO, + 6HO
Complete the table below to identify the phase of cellular respiration where each of the reactants
are used, the products are produced, and the location in the cell where that phase occurs. You
may need to refer back to previous activities on cellular respiration.
Reactants
Products
CHO
6CO,
6H0
38ATP
Phase(s) at
which it is
used or
produced
Location
STOF
POGIL" Activities for AP Biology

In cellular respiration, the glucose is used up in the phase known as glycolysis which is performed in the cell cytoplasm that breaks the glucose into 2 molecules of pyruvate.

2. 6O2

The phase reactant is used: oxidative phosphorylation

Location: mitochondrial matrix

Oxidative phosphorylation is the phase of cellular respiration that forms the ATP by the transfer of the electron to the oxygen which reduced the oxygen to water.

Products of cellular respiration are -

1. 6CO2

The phase reactant is used: Krebs cycle

Location: mitochondrial matrix

2. 6H2O

The phase reactant is used: oxidative phosphorylation

Location: mitochondrial matrix inner membrane

3. 38ATP

The phase reactant is used: oxidative phosphorylation, Glycolysis, Krebs cycle

Location: mitochondrial matrix, cell cytoplasm and inner membrane mitochondrial matrix

marianaegarciaperedo marianaegarciaperedo · Answer 2 · 2021-11-07T21:39:15+01:00

Aerobic respiration takes place in three steps: Glycolysis occurs in the cytoplasm. Krebs cycle occurs in the mitochondrial matrix. And oxydative phosphorilation that occurs in the internal mitochondrial membrane.

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Through cellular respiration cells degrade organic compounds and produce energy.

Aerobic respiration takes place in three steps or stages: Glycolysis, Krebs cycle and oxydative phosphorilation.

Glycolysis ⇒ Occurs in the cytosol

Process through which the cell partially decomposes glucose and turns it into pyruvate.

These enzymatic reactions do need no oxygen to occur.

So this step is shared by aerobic and anaerobic respiration.

Glycolysis transforms one glucose molecule (6-C) into two pyruvate molecules (3-C).

The net product of glycolusis are two pyruvate molecules (3-C), two ATP, and two NADH.

The Krebs cycle ⇒ takes place in the mitochondria matrix.

Pyruvate, the main product of glycolisis, enters the mitochondria matrix and turns into Acetyl CoA.

Once in the matrix, it enters the Krebs cycle.

Each cycle consumes one Acetyl CoA molecule, releases two carbon dioxide molecules, and produces three NADH, one FADH₂, and one ATP molecule.

Since two molecules of pyruvate are produced during glycolysis, the krebs cycle occurs twice per glucose molecule.

Oxidative phosphorilation

Electron transporter chain is placed in the internal mitochondrial membrane

The process uses electrons from NADH and FADH₂ to produce ATP.

Different redox reactions occur to pass electrons along the chain.

At the end of the chain, electrons are sent to O₂ molecules, which also receive protons to create water molecules.

Four electrons are needed to produce two water molecules from one O₂ molecule.

The proton gradient is used to produce ATP molecules.

According to this theoretical framework, we can complete the table.

Reactants

C₆H₁₂O₆ 6O₂

PHASE Glycolysis Oxydative Phosphorilation

LOCATION Cytosol Internal mitochondrial membrane

Products

6CO₂ 6H₂O 38ATP

PHASE krebs cycle oxidative glycolisis,

phosphorylation krebs cycle,

oxidative

phosphorylation

LOCATION mitochondrial mitochondrial cytoplasm

matrix membrane mitochondria

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