Cell RespirationInitial question – do plants

undergo cellular respiration?

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Glycolysis Krebs Cycle ETC Fermentation

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Row 1, Col 1

Where does glycolysis occur? List 3 important products of

Glycolysis.

Cytoplasm of cell; 2 pyruvates, 2 ATP, 2 NADH

1,2

Where does the Krebs cycle take Place – be specific.

Matrix of mitochondria

1,3

Where, specifically, is the ETC Located in the cell?

Inner membrane of the mitochondria

1,4

Fermentation is basically Glycolysis plus …

An extra step (redox reaction) that regenerates the NAD+ since there’s either no O2 to accept the e-, or there’s no

mitochondria in the cell (bacteria)

2,1

Why do scientists think glycolysisis one of the first energy

Transforming reactions to evolve?

No O2 is needed, all orgs do it, occurs in cytoplasm which all organisms have

2,2

What high energy molecules areProduced during the Krebs cycleAnd then transfer their energy

To the ETC?

NADH & FADH2

2,3

What is the final electron In cellular respiration and whereDoes that molecule come from?

O2; from the atmosphere (humans breath it in, it diffuses into the blood vessels of fish gills, other , smaller creatures

obtain it by direct diffusion with the environment.)

2,4

Which is most effective at Harvesting energy?

Glycolysis, fermentation, cellRespiration and why?

Cell respiration – it completely oxidizes glucose (food) where as the other two only split the glucose in half – partially

oxidizing it.

3,1

List the following molecules in order of most reduced

to least reduced.Pyruvate, Glucose, CO2

Glucose, pyruvate, CO2

3,2

If your butt getsSmaller due to decreased

Caloric intake and increased Burning of calories, where does

It go? Literally?

Released as CO2 & H2O from cell respiration as the fat molecules are used for cellular respiration

3,3

What is the final electron acceptorIn oxidative phosphorylation?

Oxygen (which forms two covalent bonds with hydrogen after accepting the low energy electrons –

forming water)

3,4

What final products are producedDuring lactic acid fermentation?

NAD+, lactic acid (lactate), ATP

4,1

Phosphofructokinase is inhibited By which two molecules?

ATP & citrate

4,2

Why is oxygen needed in The mitochondria for the

Krebs cycle to occur, even though It’s not directly used in the cycle?

With out it present to accept e- from the ETC, NAD+ and FAD+ wouldn’t be regenerated.

4,3

Explain how the structure of the Mitochondria enables it’s

Function. (be able to explain At least 2 structural

characteristics)

1) Cristae- folds allow for greater surface area for more copies of the ETC resulting in more ATP. 2) Inner mem allows for the creation of a concentration gradient. 3) proteins

in ETC are sequenced such that each one is more electronegative than the previous – allows for e- to move “down” toward O2

4,4

What final products are producedDuring alcoholic fermentation?

Ethanol, NAD+, ATP, CO2

5,1

What shows the rate ofPhotosynthesis at various

Wavelengths?

Action spectrum

5,2

Which of the following moleculesEnter the Krebs cycle?

Pyruvate, NADH, NAD+, CO2, ATP, ADP, glucose, FAD+, FADH2, O2, acetyl Co-A

Acetyl Co-A, NAD+, FAD+, ADP

5,3

What is the most direct energy Source that powers the formation

Of ATP during oxidative phosphorylation?

The H+ gradient across the inner mitochondrial membrane (they diffuse through ATP synthase due to

this)

5,4

Bread is the product of baking a mixture of flour, water, salt, yeast and other ingredients. During it’s

Baking, a beer-like odor is often detected.

Explain how yeast makes breadRise.

Not much O2 can diffuse through the dough to get to all the yeast cells so the yeast must produce ATP via alcoholic fermentation

which produced CO2 gas as a waste product. This gas causes the dough to rise as it gets “stuck” in the dough.