BIOL 005A Lecture Notes - Lecture 10: Electron Acceptor, Anaerobic Respiration, Facultative Anaerobic Organism

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coralmouse327

2 Feb 2018

School

UC Riverside

Department

Biology

Course

BIOL 005A

Professor

Kaloshian Isgouhi, Mauck Kerry

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Document Summary

Biol 005a lecture 10 - respiration part 2 and fermentation. Learning goals: respiration parts 1 and 2. Diagram the flow of energy in an ecosystem. Explain what a redox reaction is and be able to identify which reactant is oxidized and which is reduced. Explain what electron carriers are and why they are important for metabolism. Describe the inputs and outputs of cellular respiration (reactants/products and their purpose, location where reactions take place and why) Explain how oxidative phosphorylation couples electron transport to atp synthesis. Diagram how other macromolecules (besides glucose) are broken down to feed into cellular respiration. During oxidative phosphorylation, chemiosmosis couples electron transport to atp synthesis. The total yield per glucose from glycolysis + the citric acid cycle is 8 nadhs, 2. Totsal yield per glucose from oxidative phosphorylation is 28 atp. The inner mitochondrial membrane couples electron transport to atp synthesis.

Related Questions

What is substrate-level phosphorylation

? What is oxidative phosphorylation

? Explain how cellular respiration produces ATP from molecules with high potential energy, such as glucose

? Describe the four components of cellular respiration? What goes into each and comes out of each?

? What is fermentation? How are cellular respiration and fermentation regulated?

? Describe how fermentation operates in the absence of the electron transport chain?

? What does cellular respiration do? What is the chemical equation? ? What is the role of the electron carriers NADH and FADH2

? What is the final electron acceptor of aerobic respiration?

? What is the difference between aerobic and anaerobic respiration?

? What does the enzyme phosphofructokinase do and how is it regulated?

? What is acetyl CoA?

? Where do all of the processes involved in cellular respiration take place within the cell?

? What is ATP synthase and what is its role? ? What is cytochrome C and ubiquinone (Q)? What do these do?

? What is chemiosmosis and how does it generate ATP?

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Question 1

Which of the following statements regarding photosynthesis and cellular respiration is true?

	A.	Photosynthesis occurs in mitochondria, and cellular respiration occurs in chloroplasts.
	B.	Photosynthesis occurs in chloroplasts, and cellular respiration occurs in mitochondria.
	C.	Photosynthesis occurs in mitochondria and in chloroplasts.

Question 2

How do cells capture the energy released by cellular respiration?

	A.	They produce glucose
	B.	The energy is coupled to oxygen
	C.	They produce ATP

Question 3

During redox reactions

	A.	the loss of electrons from one molecule is called reduction
	B.	electrons are lost from one substance and added to another substance
	C.	protons from one molecule replace the electrons lost from another molecule

Question 4

Oxidation is the ________, and reduction is the ________.

	A.	gain of oxygen; loss of oxygen
	B.	loss of electrons; gain of electrons
	C.	gain of protons; loss of protons

Question 5

During cellular respiration, NADH

	A.	delivers its electron load to the first electron carrier molecule.
	B.	is chemically converted into ATP
	C.	is the final electron acceptor

Question 6

A drug is tested in the laboratory and is found to create holes in both mitochondrial membranes. Scientists suspect that the drug will be harmful to human cells because it will inhibit

	A.	the citric acid cycle only.
	B.	glycolysis only
	C.	the citric acid cycle and oxidative phosphorylation

Question 7

Which of the following metabolic pathways is common in aerobic and anaerobic metabolism?

	A.	glycolysis
	B.	the citric acid cycle
	C.	electron transport chain

Question 8

Which of the following is a result of glycolysis?

	A.	production of CO2
	B.	a net loss of two ATPs per glucose molecule
	C.	conversion of glucose to two three-carbon compounds

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 â 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 â the lumen of the thylakoid and the stroma. Explain why it is essential to have these spaces separated by membranes.

BIOL 005A Lecture Notes - Lecture 10: Electron Acceptor, Anaerobic Respiration, Facultative Anaerobic Organism

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