bio 100 cellular respiration practice
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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
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