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Biology 1202B Lecture Notes - Lecture 9: Atp Synthase, Light-Independent Reactions, P680

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School
Western University
Department
Biology
Course
Biology 1202B
Professor
Niki Sharan

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Document Summary

Phyophyten is not electronegative enough to just take the electron. The effects of a psii mutation on calvin cycle molecules include: nadph and atp will not be produced (the calvin cycle will slow down) In order for nadph to be produced, an electron has to be taken from water, and the only complex that is able to split water is psii, so psi would not be able to take over. Going from psii to psi all the way to nadp+ is linear photophosphorylation; energy from photons is being used to phosphorylate adp and make atp. It is linear because nothing is cycling back to keep the system going. This is an example of negative feedback regulation; this is determined by looking at the ctp levels. If ctp levels are low, ncarb formation is high; more ctp means less ncarb formation. Photoisomerization of pigment leading to change in isomeric structure.

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Related Questions

1. Pyruvic acid is produced in __________, and is the starting point for __________.

a. the Krebs cycle; the electron transport chain .

b. The Prep step; Glycolysis.

c. The Krebs cycle; Glycolysis.

d. The electron transport chain; The Prep step.

e. Glycolysis; The Prep step.

2. Which process enables glycolysis to continue to run by generating needed reactants without oxygen?

a. Aerobic respiration

b. Electron transport chain

c. Krebs cycle

d. Fermentation

e. All of the above

3. When water is oxidized by green plants, what is produced?

a. oxygen

b. carbon dioxide

c. sulfur granules

d. hydrogen sulfide

4. In cyclic photophosphorylation, the electrons

a. return to chlorophyll in PS I.

b. are used to make ATP & NADPH.

c. are energized in both PSI and PSII.

d. are converted to glucose.

5. In the Calvin-benson cycle:

a. oxygen is used to synthesize sugars.

b. carbon dioxide is used to synthesize

sugars.

c. ATP is formed.

d. light is required.

6. Light dependent reaactions:

a. capture the energy of sunlight with chlorophyll in PS I & PS II

b. make ATP & NADPH using electron transport chains

c. energize electrons in both PSI & PSII

d. include both cyclic and noncyclic pathways

e. all of the above

7. The five-carbon sugars of nucleotides are

derived from either the ______ or ______.

a.pentose phosphate pathway; Entner-Doudoroff pathway

b. pentose phosphate pathway; the Krebs cycle

c. Entner-Doudoroff pathway; glycolysis

d. glycolysis; the Krebs cycle

8. The pentose phosphate pathway provides a means to break down glucose and synthesize

a. DNA

b. six-carbon sugars.

c. peptidoglycan

d. galactose.

1. Write the overall equation for the BALANCED aerobic cellular respiration reaction. Write the chemical (molecular) formulas AND names of the molecules. Label the reaction as endergonic or exergonic. Label products and reactants and state in which process(es) each product or reactant comes into play (Glycolysis, Krebs, ETC)

2. Write the overall equation for the BALANCED photosynthesis reaction. Write the chemical formulas AND names of the molecules. Label the reaction as endergonic or exergonic. Label products and reactants and state in which process(es) each product or reactant comes into play (light reactions, Calvin cycle).

3. Explain how the products and reactants of cellular respiration are related to the products and reactants of photosynthesis. Be specific. Explain why plants must do both reactions and people do not.

4. Why is cellular respiration essential to life?

5. Why is photosynthesis essential to ALL life – not just plant life? Think of two big reasons!

6. How is photophosphorylation (not photosynthesis) similar and different than oxidative phosphorylation? Write a compare and contrast answer. You must have at least 2 similarities and 2 differences. This must be written as a paragraph and not a list. When you state a difference for one, give how the other is different too!

7. An electron transport chain (ETC) chain is essential for cellular respiration. What is the function of the ETC in cellular respiration? Draw a diagram illustrating the ETC in cellular respiration.

8. An ETC chain connects PSII and PSI. What is the function of electron flow from PSII to PSI? Draw the Z-scheme illustrating the ETC in photosynthesis.

9. The inner membrane of a mitochondrion has lots of folds, or cristae, giving it lots of surface area for electron transport chains. Suppose the inner membrane was smooth instead, how would this affect cellular respiration?

10. The chloroplast has a couple of different spaces – the lumen of the thylakoid and the stroma. Explain why it is essential to have these spaces separated by membranes.

The following 9 steps in the linear (or noncyclic)electron flow of the light reactions in photosynthesis are inrandom order. Indicate the correct chronological order.

(Please note, do not rely on the step numbersprovidied in your textbook. The order is the same, but some stepsbelow may be combined or split relative to how the textbook numbersthe steps.)


Oxygen is formed as anendproduct. Answer836142579
An electron is transferedfrom an electron transport chain from photosystem II to photosystemI's primary electron acceptor. Answer328547691
NADP+ is reducedto NADPH. Answer167483259
An electron is transferredfrom photosystem II to the primary electron acceptor. Answer284175396
Electrons are passed fromphotosystem I through an electron transport chain. Answer312487569
A photon of light excitesphotosystem II. Answer846925731
ATP is synthesized as theelectrons pass through an electron transport chain to photosystemI. Answer861243597
A water molecule is split,the electrons are transferred to photosystem II. Answer578143269
A photon of light strikesphotosystem I, an excited electron is transferred to the primaryelectron acceptor. Answer276135849