MICR 2123 Lecture Notes - Lecture 10: Chromophore, Photosynthetic Reaction Centre, Nitrification

23 views5 pages

lavenderchimpanzee34

8 Oct 2016

School

Department

Course

Professor

For unlimited access to Class Notes, a Class+ subscription is required.

Document Summary

Microes transfer energy by moving electrons: electrons move onto energy carriers (e. g. nadh) from reduced food molecules or substrates (e" donor), to oxidized molecules (e" acceptor). If this movement occurs across a membrane, it creates what is called an electron transport chain or system (etc or etc) Electron donors: are themselves reduced, examples are: H2s (inorganic: that"s why they have electrons to donate. Electron acceptors: are themselves oxidized, examples are: O2, no3, so4: when accepting electrons, they get reduced. Electrons move from a reduced donor to an oxidized acceptor. The ets is embedded in a membrane that separates two aqueous compartments: maintains the ion gradient generated by the ets since the membrane is impermeable to the ion, the respiratory ets. A respiratory electron transport system includes at least 3 functional components: an initial substrate oxidoreductase (or dehydrogenase) This is the first enzyme in the chain that oxidize the electron donor, e. g. nadh dehydrogenase in case of nadh e" donor.

Related Questions

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

MICR 2123 Lecture Notes - Lecture 10: Chromophore, Photosynthetic Reaction Centre, Nitrification

Document Summary

Get access

Related Documents

MICR 2123 Lecture Notes - Lecture 9: Decarboxylation, Na Hussein Dey, Pyruvate Dehydrogenase Complex

BIOL 2051 Lecture Notes - Lecture 13: Electron Acceptor, Citric Acid Cycle, Oxidative Phosphorylation

BIOL 2051 Chapter : Chap 13 And 14

Related Questions