Lecture : Lecture 9 Catabolism

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nursingstudent3636

28 Feb 2022

School

University of Maine

Department

Micro and Molecular Biology

Course

BMB 240

Professor

Catherine Hopper

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Document Summary

The movement of electrons from an electron source (donor) molecule (reduced) to an electron receptor. Breakdown of larger more complex molecules into smaller, simpler ones. Energy (atp) by substrate level and oxidative phosphorylation. Supply carbon and building blocks: catabolic pathways in the chemoorganoheterotroph. Fermentation: embden-meyerhof pathway also known as glycolysis. Yields 2 atp and 2 nadh: embden-meyerhof simplified glycolysis, pentose phosphate and enter-doudoroff pathways. Produces pyruvate and precursors for rna synthesis and protein synthesis. Can also regenerate gluclose-6-phosphate: what happens to pyruvate, tca or krebs cycle. Product- 2 atp, 6 nadh, and 2 fadh2. Works by releasing excess carbon as co2 (3) 4 nadh and 1fadh2- potential energy (per pyruvate!) 1gtp (atp) this energy is generated. For each pyruvate, 3nadh and 1 fadh2 are produced. 3c pyruvate is converted into 2c acetyl coa. Acetyl coa donates 2c to form 6c citrate. Then gives off co2, energy, and oxaloacetate. For eukaryotes- cristae (inner membrane of the mitochondria)

Related Questions

1. the product of glycolysis are?

2.ATP made during glycolysis is made by what process?

3.where in eukaryotic cells does oxidative phosphorylation takeplace?

4. what is the purpose of fermentation?

5 the greatest contribution of electrons to the ets come fromwhat?

6. what is the compound that feeds into krebs cycle?

7. what is catabolism? list some examples?

8. what is anabolism? list some examples?

9. how many ATP are produced from the electron transport chainalone from one molecule of glucose?

10. how many ATP molecules are generated for each molecule ofglucose in aerobic respiration?

skytortoise751

Which of the following is common to both aerobic and anaerobicmicrobes?

	Fermentation
	An electron transport chain
	Pyruvate oxidation
	Glycolysis
	All of the above

The primary purpose of catabolism is

	generation of ADP.
	generation of ATP.
	oxidation of NADH to NAD⁺.
	degradation of organic molecules.
	biosynthesis.

What is a fate of pyruvate during alcoholic fermentation byyeast?

	It is reduced to lactic acid.
	It is oxidized to form glucose and carbon dioxide
	It is cleaved to form acetylaldehyde and carbon dioxide.
	It is catabolized in glycolysis.
	It is oxidized to form lactic acid and carbon dioxide.

Electrons needed to reduce an oxidized electron acceptor areprovided by

	a) externally provided compounds such asH<sub>2</sub>, lactate or formate.
	b) an intermediate electron carrier such as NADH.
	c) 0<sub>2</sub>.
	d) Both a and b
	e) All of the above

How are aerobic respiration and anaerobic respirationsimilar?

	Both use oxygen as a terminal electron carrier.
	These are other names for glycolysis.
	Both utilize inorganic molecules as terminal electronacceptors.
	Neither receives electrons from glycolysis.
	Anaerobic respiration does not exist in microbes.

The conversion of phosphoenolpyruvic acid (PEP) topyruvate

	a) releases CO<sub>2</sub>.
	b) involves the conversion of ADP and ATP.
	c) involves substrate-level phosphorylation.
	d) Both a and b
	e) Both b and c

Which of the following is the best definition offermentation?

	The reduction of glucose to pyruvic acid
	The complete catabolism of glucose to CO₂ andH₂O
	The oxidation of a carbohydrate with organic molecules servingas electron donors and acceptors
	The production of ATP from glucose
	The production of ethanol from glucose

A reaction that yields energy has a

	positive ?G_o?.
	negative ?G_o?.
	positive ?E_o?.
	negative ?E_o?.
	negative ?H_o?.

Oxidation and reduction reactions are always coupledbecause

	a) electrons generally accompany protons.
	b) protons generally accompany protons.
	c) electrons cannot exist free in solution.
	d) Both a and b
	e) All of the above

10.

Which of the following is true of aerobic respiration?

	It involves the reduction of oxygen.
	It involves the oxidation of oxygen.
	It involves the reduction of lactic acid.
	It involves the oxidation of lactic acid.
	It does not generate ATP.

plumgnu195

In E. coli an enzyme, nitrate reductase, is found in the electron transport chain. The enzyme transfers an electron to nitrate (NO3) instead of oxygen. What type of pathway is this? A. Aerobic respiration B. Anaerobic respiration C. Fermentation D. Oxidative dephosphorylation

coffeetoad602

Lecture : Lecture 9 Catabolism

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