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Topic 8 Respiration Homework Questions
Oxidation-Reduction Reactions (Redox Reactions)
What are characteristics of oxidation reactions?
What are characteristics of reduction reactions?
In this non-biological example, H2 + F2 → 2 HF, identify what is reduced and what is oxidized.
(This equation shows the intermediate step: H2 + F2 → 2 H+ + 2 F− → 2 HF)
Oxidation-reduction reactions are coupled in respiration. What does coupled mean?
How are the coupled reactions related? (What connects them, or what goes between them?)
Glycolysis
Where does glycolysis happen?
List the names of the four steps of glycolysis.
What is the reactant of glycolysis, don’t include energy transfer molecules like ATP?
What is the product of glycolysis, don’t include energy transfer molecules like ATP?
What does phosphorylation mean?
What does lysis mean?
What is oxidized? What is reduced?
How much ATP is produced by glycolysis of one glucose molecule?
Link Reaction
Where does the link reaction happen?
What is the reactant? What is the product?
What enzyme catalyzes the reaction?
What is oxidized? What is reduced?
Krebs Cycle
Where does the Krebs cycle happen?
What is the reactant of the Krebs cycle that comes from glycolysis?
How many carbon atoms does it have, don’t include the enzyme?
How many carbon atoms does the reactant that comes from the Krebs cycle have?
What does decarboxylated mean?
How many decarboxylation reactions occur?
What reaction is coupled to the decarboxylation reactions?
What other reduction reactions occur as the cycle regenerates the initial reactant?
For one glucose molecule that enters the cell, how many times does the Krebs cycle happen?
How many ATP molecules are produced by the link reaction and the Krebs cycle for one glucose
molecule that enters glycolysis?
Oxidative Phosphorylation
What are the reactants of oxidative phosphorylation?
Where do they come from?
What do they give to the electron transport chain?
Where are the electron transport chains?
As the electron transport chain carries out a series of oxidation-reduction reactions, what else
happens?
What accumulates in the intermembrane space?
What is a chemiosmotic gradient?
What does the gradient do to the enzyme complex called ATP synthase?
What does ATP synthase do?
How many ATP molecules are produced by oxidative phosphorylation of one original glucose
molecule?
How many ATP molecules are produced by aerobic respiration of one glucose molecule?
Mitochondrion Structure and Function
Draw and label a simple diagram of the structure of the mitochondrion.
Describe how the following structures are related to the function of the mitochondrion.

double membrane structure

cristae

matrix

intermembrane space