Biology 183 Exam IIA: Photosynthesis and Calvin Cycle

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Which of the following statements is true regarding cyclic photophosphorylation?

It doesn't use photosystem II (correct)

It produces ATP

A and C

A and B

It produces NADPH

What are the end products of the Calvin Cycle?

Sugar only (correct)

ATP and NADPH

NADPH and RuBP

ATP and sugar

B and C

In what order do the following events occur: 1. cellular protein is phosphorylated 2. G protein is activated 3. cAMP is produced 4. Signal molecule binds to membrane receptor 5. GPCR is activated?

42513

45231

45123

34521 (correct)

42531

During which phase do sodium channels open and potassium channels close?

Depolarization Signup and view all the answers

What role does water play in photosynthesis?

Provides electrons for photosystem II Signup and view all the answers

Which process allows plants to grow in response to light?

Phototropism Signup and view all the answers

What type of signal molecules bind to receptors in the cytoplasm to trigger a cellular response?

Hydrophilic Signup and view all the answers

Which enzyme uses a H+ gradient to produce ATP during photosynthesis?

ATP synthase Signup and view all the answers

What is the process where a membrane becomes less negative relative to the surrounding environment?

Depolarization Signup and view all the answers

Which photopigments in plants act to dissipate the light and offer photoprotection for the plant?

Carotenoids Signup and view all the answers

According to the information given, where is ATP synthase located in a chloroplast?

Thylakoid membrane Signup and view all the answers

What is the role of a protein kinase?

Adding a phosphate to a molecule Signup and view all the answers

What happens when a G-protein is activated?

It acts as a signaling molecule inside the cell Signup and view all the answers

What is the effect of hyperpolarization on a cell membrane?

It makes it harder for an action potential to occur Signup and view all the answers

How many CO2 molecules are released in the pyruvate oxidation step per glucose?

4 Signup and view all the answers

Which term would not be used to describe the light reactions of photosynthesis?

CO2 Signup and view all the answers

How many FADH2 molecules are produced in the citric acid cycle per acetyl CoA?

1 Signup and view all the answers

What is the purpose of the fermentation process?

The regeneration of NAD+. Signup and view all the answers

Where do the non-light requiring reactions of photosynthesis occur?

Stroma Signup and view all the answers

What is the final electron acceptor in the mitochondrial electron transport chain?

Oxygen Signup and view all the answers

What is photorespiration?

An inefficient way plants can produce organic molecules and in the process use oxygen and release carbon dioxide Signup and view all the answers

Which of the following is NOT a product of glycolysis?

FADH2 Signup and view all the answers

If glucose isn’t available, what other molecules can drive oxidative phosphorylation?

A and B Signup and view all the answers

What is the function of chlorophyll b in photosynthesis?

Secondary pigment acting as antioxidant Signup and view all the answers

How many carbons are present in a RuBP molecule?

6 Signup and view all the answers

What is the role of photosystem II in photosynthesis?

Reaction center that helps split water to gain electrons Signup and view all the answers

How many NADPHs are needed in the fixation phase only for every 6 CO2 incorporated?

8 Signup and view all the answers

What is the function of stoma in plants?

Pore on underside of leaf for allowing CO2 and O2 exchange Signup and view all the answers

How many CO2 molecules are needed to produce one molecule of sugar (that can be converted to glucose) in the Calvin cycle?