Cellular Respiration Practice

During cellular respiration, oxidation is the result of the removal of _______ atoms from substrates such as glucose.

Hydrogen

__________ and ________ are the coenzymes that are present in cellular respiration.

FAD and NAD+

The prep (transition) reaction takes place in the:

Mitochondrial matrix

In the electron transport chain, _____________ is the terminal electron acceptor.

O2

The total ATP yield of cellular respiration is:

36 or 38

In terms of its need for oxygen presence or absence, glycolysis is a(n) ________________ series of reactions.

anaerobic

NADH produced during glycolysis is transported and becomes part of which phase of cellular respiration?

Electron transport chain

Which molecules are carrying high-energy electrons during cellular respiration?

NADH and FADH2

The net production of ATP molecules from glycolysis is:

2 ATP

Where does the Krebs cycle occur?

Mitochondrial matrix

The coenzymes NADH and FADH2 are carrying what to the electron transport chain?

High energy electrons

After accepting the low energy electrons at the end of the electron transport chain, O2 reacts to form:

H2O

Most ATP in eukaryotic cells is produced where?

Mitochondria

Most ATP produced in aerobic respiration occurs during what stage:

Electron transport chain

Which 2 stages of cellular respiration produce CO2?

Preparatory reaction and Krebs cycle

During cellular respiration, ___________ is oxidized and ___________ is reduced.

Glucose and oxygen

Why would 36 ATP be formed instead of 38 during cellular respiration

2 ATP will be used to bring NADH into the mitochondria from the cytoplasm

Products of glycolysis include:

NADH, ATP, pyruvate

The final electron acceptor in aerobic respiration is:

Oxygen

Products of the Krebs cycle include:

Carbon dioxide, FADH2, NADH, and ATP

In the presence of oxygen, all cells synthesize ATP via the process of glycolysis. Many cells also can metabolize pyruvate if oxygen is not present, via the process of:

Fermentation

The net result (number of ATP) of the breakdown of glucose in glycolysis and fermentation is the production of:

2 ATP

How many ATP molecules are produced when one FADH2 donates electrons to the ETC?

2

Which stage of aerobic respiration requires ATP?

Glycolysis

The correct order of the phases of cellular respiration is

Glycolysis, prep reaction, Krebs cycle, ETC

How many ATP molecules are produced when one NADH donates electrons to the ETC?

3

Respiration occurs in what organisms?

All organisms

Two possible ways for respiration to occur is:

Fermentation and aerobic

Glucose is converted to pyruvate in

Glycolysis

Two hydrogen carriers involved in aerobic respiration are

NAD+ and FAD

The role of oxygen in aerobic respiration is

Accept electrons at the end of the electron transport chain and form water

What is the net gain in ATP molecules produced during the reactions of glycolysis under anaerobic conditions?

2 ATP

When a muscle cell is metabolizing glucose in the complete absence of molecular oxygen, which substance is produced?

Lactate

Which part of respiration is common to both anaerobic and aerobic metabolism?

Glycolysis

When glucose is broken down to carbon dioxide and water during aerobic respiration, more than 60% of its energy is released as

Heat

Cellular respiration releases energy by breaking down glucose in the presence of

Oxygen

The products of _________ are 2 ATP, 2 NADH, and 2 pyruvic acid molecules.

Glycolysis

What are the reactants in the equation for cellular respiration?

Glucose and oxygen

During cellular respiration, what 3 parts do require oxygen?

Preparatory stage, Krebs cycle, electron transport chain

Where does glycolysis occur?

Cytoplasm

The starting molecule for glycolysis is

Glucose

What are possible products of fermentation?

CO2, alcohol, lactate

Location of the ETC.

Mitochondrial cristae

During which stage of cellular respiration is no ATP produced?

Preparatory reaction

What two molecules act as an electron carrier in cellular respiration?

NAD+ and FAD

During cellular respiration, which part does not require oxygen?

Glycolysis

The energy of the electrons passing along the electron transport chain is used to make

ATP

Breathing heavily after running a race is your body’s way of

Repaying an oxygen debt