BIOA01H3 Lecture Notes - Lecture 11: Itta Of Metz, Photosynthesis, Photosynthetic Reaction Centre

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Glucose can be broken down in the absence of oxygen by fermentation, producing a small amount of atp. Metabolic pathways are integrated allowing control of the energy level of cells. In the absence of oxygen, glucose is broken down by fermentation. Lactic acid fermentation occurs in animals and bacteria. electrons from nadh are transferred to pyruvate to produce lactic acid and nad+. Pyruvate releases carbon dioxide to form acetaldehyde, and electrons from nadh are transferred to acetaldehyde to produce ethanol and nad+. Before the presence of atmospheric oxygen, organisms likely used one of the fermentation pathways to generate the atp needed for cellular processes. Cellular respiration can occur in the absence of oxygen, but needs a final electron acceptor such as nitrate or sulfate. Anaerobic respiration evolved before aerobic respiration (which required free oxygen not available on primitive earth) Aerobic organisms harness more energy from organic molecules to power the work of the cell.

Related Questions

Fermentation occurs in the absence of oxygen, but O2 is not found in any of the reactions of glycolysis or fermentation. So, what drives these reactions at the level of glycolysis and fermentation? A. In the formation of ethanol, acetaldehyde accepts electrons from NADH, regenerating NAD+ B. ATP is synthesized in glycolysis, only if NAD+ is regenerated during fermentation C. Pyruvate donates electrons to NADH in lactic acid fermentation D. NADH synthesized in glycolysis is used to oxidize pyruvate to acetyl CoA during fermentation reactions E. In the formation of ethanol, pyruvate is decarboxylated in a reversible reaction, once oxygen is present again

teallizard787

(31. What is the purpose of cellular respiration/

a. To get O2 into our bodies and to get CO2 out of our bodies

b. To use the energy of sunlight to synthesize sugars

c. To make ATP to power cellular activities d. To hydrolyze ATP

(36. Which of the following accurately describes a distinction between lactic acid fermentation and alcoholic (ethanol) fermentation?

a. Lactic acid fermentation occurs in prokaryotes, whereas alcoholic (ethanol) fermentation occurs in eukaryotes

b. The final electron acceptor in lactic acid fermentation is pyruvate; the final electron acceptor in alcoholic (ethanol) fermentation is acetaldehyde

c. In lactic acid fermentation, NADH is produced by glycolysis; in alcoholic (ethanol) fermentation, NADH is produced by the Krebs cycle

d. In lactic acid fermentation, cell use CO2 in place of oxygen; in alcoholic (ethanol) fermentation, cells use SO4

(37. Which pathway is see in both fermentation and aerobic respiration?

a. Krebs cycle

b. Electron transport

c. Glycolysis d. Pyruvate oxidation

(50. How many molecules of carbon dioxide (CO2) would be produced with 5 turns of the cirtic acid cycle?

a. 2

b. 5

c. 10

d. 12

e. 60

lilaccrocodile636

What is the main product of cellular respiration?

TRUE or FALSE: Glycolysis does not require oxygen.

During glycolysis, 2 molecules of ___ are required in âglucose primingâ or activation.

In what cells does ethanol fermentation occur?

In what cells does lactic acid fermentation occur?

TRUE or FALSE: The light-dependent reactions of the cyclic pathway produce ATP.

What wavelength of light has the most potential energy for photosynthesis?

Which is the only plant with the ability to overcome the inefficiencies of photorespiration?

Plants appear green because ________ .

The Krebs cycle occurs __ times in order to fully break down glucose.

The Krebs cycle takes place in the ____ of the cell.

TRUE or FALSE: Nucleic Acid can be broken down to create ATP.

The bulk of the ATP that our bodies need is harvested through which of the following: Anearobic processes or Aerobic processes?

TRUE or FALSE: The electron transport chain is aerobic.

How many ATP molecules do anaerobic pathways produce?

BIOA01H3 Lecture Notes - Lecture 11: Itta Of Metz, Photosynthesis, Photosynthetic Reaction Centre

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