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CELLS HARVEST ENERGY

CELLS HARVEST ENERGY from FOOD - CSCC

QuestionAnswer
The oxidation of foodstuffs to obtain energy is called respiration. A) True B) False False
Chemically, there is little difference between the oxidation of carbohydrates in a cell and the burning of wood in a fireplace.A) True B) False True
The first stage of cellular respiration takes place in the ___________ of a cell. cytoplasm
The stage of cellular respiration that does not require oxygen is glycolysis
Cellular respiration involves the dismantling of food molecules to obtain oxygen. A) True B) False False
The second stage of cellular respiration takes place within the ________ of a cell mitochondria
Sugars are the only molecules that generate ATP through glycolysis. A) True B) False False
The lactic acid produced during fermentation in muscles is used by muscles as another source of fuel. A) True B) False True
During fermentation, yeast adds extracted electrons to acetaldehyde to form ethanol. A) True B) False True
The carbon atoms from a completely oxidized glucose molecule become part of carbon dioxide. A) True B) False True
The loss of electrons from food molecules is reduction. A) True B) False False
_________________ is the end product of glycolysis and is the starting material for the Kreb's cycle. pyruvate
In alcohol fermentation, pyruvate is reduced directly and the product is lactate. A) True B) False False
The electrons harvested by oxidizing food molecules are used to power proton pumps that chemiosmotically drive the production of ATP. A) True B) False True
A biochemical pathway is a series of sequential biochemical reactions. A) True B) False True
The food that you eat provides cells with __________ to fuel cellular respiration. A) amino acids B) fatty acids C) glucose D) all of the above D) all of the above
Common end-products of fermentation include: A) glucose B) ethanol C) lactate D) pyruvate E) b and c E) b and c
In mitochondria the Kreb's cycle takes place in the matrix
The electron transport chain powers the production of ATP and uses electrons to link an oxygen atom with hydrogen ions to form _____________. water
The electron transport chain is located in the ______________ of the mitochondria. inner membrane
In animals, the energy for life is obtained by cellular respiration. This involves breaking down the organic molecules that were consumed.
NAD+ is recycled during fermentation
During glycolysis, ATP forms by substrate-level phosphorylation
Which of the following processes can occur in the absence of oxygen? glycolysis
Every living creature on this planet is capable of carrying out the rather inefficient biochemical process of glycolysis, which makes ATP by splitting glucose and capturing the energy.
The electrons generated from the Krebs cycle are transferred to ____________ and then are shuttled to _______________. NAD+ / electron transport chain
The final electron acceptor in lactate fermentation is pyruvate
After glycolysis the pyruvate molecules go to the mitochondria of the cell and are broken down in the presence of O2 to make more ATP.
The vast majority of the ATP molecules produced within a cell are produced from the electron transport chain.
Cells can extract energy from foodstuffs other than glucose because each type of macromolecule is broken down into its subunits, feed into the oxidative respiration pathway.
Created by: Bonnie870
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