mastery assignment 4

where does glycolysis take place

cytoplasm of the cell

Which of the following metabolic processes take place in the cytosol of a eukaryotic cell?

glycolysis and fermentation

in the mitochondrion the citric acid cycle takes places

in the mitochondrial matrix

oxidative metabolism happens where in the cell

internal folded mitochondrial membranes (cristae)

Approximately how many molecules of ATP are produced from the complete oxidation of one molecule of glucose (C6H12O6) in aerobic cellular respiration?

30-32

fermentation in a cell

anaerobic pathway for breaking down glucose, the only energy extraction pathway is glycolysis with 1 or 2 reactions tacked on the end

Which of the following events takes place in the electron transport chain?

the harnessing of energy from redox reactions to generate a proton gradient

If a cell produces on average 30 ATP molecules for each molecule of glucose that is completely oxidized to carbon dioxide and water, how many ATP molecules on average can the cell synthesize for each molecule of pyruvate oxidized to carbon dioxide and water?

12.5

Which of the following statements best describes the electron transport chain?

It consists of a series of redox reactions. The ETS is embedded in the cytoplasmic membrane of prokaryotes and the inner mitochondrial membrane of eukaryotes

the primary role played by oxygen in cellular respiration?

It serves as the final acceptor for electrons from the electron transport chain

When a cell is deprived of oxygen, which of the following processes will be inhibited first?

The electron transport chain and NADH is no longer converted to NAD+. Cellular respiration always begins with glycolysis, which can occur either in the absence or presence of oxygen. Cellular respiration that proceeds in the absence of oxygen is anaerobic respiration. Cellular respiration that proceeds in the presence of oxygen is aerobic respiration.

Energy released from the electron transport chain is used to pump H+ ions into which location in eukaryotic cells?

mitochondrial intermembrane space, During electron transport, energy is used to pump hydrogen ions across the mitochondrial inner membrane, from the matrix into the intermembrane space.

Which of the following statements describes a primary function of both alcohol fermentation and lactic acid fermentation?

oxidation of NADH to NAD+