Biology

7. A toxin has rendered one of the proton pumps of the electron transport chain (located on the inner membrane of the mitochondria) non-functional.

A. How would this effect the production of ATP (increase, decrease, no change)?

8. You are running away from a bear (yikes!) and the oxygen demand in your muscle cells is exceeding your oxygen supply. Without sufficient oxygen, electrons will not be pulled through the electron transport chain.

A. Describe how would this effect ATP production (increase, decrease, no change)?

B. Describe how would this effect NADH production (increase, decrease, no change)?

C. Describe how would this effect pyruvate production (increase, decrease, no change)?

Chapter 10- Photosynthesis

1. The summary reaction for photosynthesis can be written as:

Sunlight Energy + 6 CO2 + 6 H2O ® C6H12O6 + 6 O2

-When electrons are pulled from water, water is [oxidized/reduced] to oxygen.

-Later in the process, these electrons are added to carbon dioxide molecules [oxidizing/reducing] them to glucose.

-This reaction is [anabolic/catabolic] and [endergonic/exergonic].

2. The various reactions in photosynthesis are spatially segregated from each other within the chloroplast. Draw a simplified diagram of a chloroplast and include these parts: outer membrane, inner membrane, thylakoid membrane, thylakoid space, stroma.

You are not required to submit a drawing, however be sure to understand the orientation of the parts of this organelle as it is vital to your understanding of the process of photosynthesis.

In your diagram, label where the:

A. light reactions occur.

B. Calvin cycle occurs.

Light Reactions

10_17ThylakoidMembrane_L.jpg

10_13NoncyclicElectron_5_L.jpg

Provide an explanation of the 8 steps of the light reactions of photosynthesis:

1.

2.

3.

4.

5.

6.

7.

8.

3. In photosynthesis, the reduction of carbon dioxide to form glucose is carried out in a controlled series of reactions. In general, each step or reaction in the sequence requires the input of energy. The sun is the ultimate source of this energy.

Are the compounds used or produced in: Photosystem II? Photosystem I? The Calvin cycle?
Glucose
O2
CO2
H2O
ATP
ADP + P
NADPH
NADP+

Calvin Cycle

10_18CalvinCycle_3_L

4. If you start with 12 molecules of CO2 at the beginning of the Calvin cycle, how many molecule of glucose could you make?

5. If you wanted to make 4 molecules of glucose, how many molecules of CO2 would you need?

2

 

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