Organisms need energy to sustain life processes like growth, movement, and reproduction. They obtain energy primarily from food sources through cellular respiration. Cellular respiration involves glycolysis, the Krebs cycle, and the electron transport chain to break down glucose and harvest energy, producing ATP as energy currency. ATP is an excellent energy donor that is recycled thousands of times per second to power cellular work. The three main stages of cellular respiration extract energy from glucose in steps, with glycolysis occurring in the cytoplasm, the Krebs cycle in the mitochondrial matrix, and the electron transport chain across the inner mitochondrial membrane via chemiosmosis. Oxygen is required for the electron transport chain, which produces the most ATP and drives ATP synthesis. Cellular

1. Making energy PPT questions
Awad
AP Bio
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What do organisms need energy for?
Where do organisms get their energy from? What is energy coupling?
What is living economy? And why do organisms need an energy currency?
What is ATP?
What makes ATP an excellent energy donor?
How much energy does ATP release?
What is phosphorylation? What is Kinase?
Give an example of phosphorylation
If ATP is short term energy storage, what constitute long term energy storage?
How many ATPs are recycled a second by a working muscle?
What is ATP synthase and what role does it play in making ATP?
Cellular Respiration: Overview
What is the point of cellular respiration?
What molecules store energy? And how do they get to the Heterotrophs?
Why do heterotrophs need to digest organic compounds?
What is catabolism?
Compare combustion to respiration
Explain oxidation and reduction in the steps of harvesting energy from foods.
How do electrons are moved in living systems?
What do Redox reactions accomplish in Respiration?
Describe 4 differences between Oxidation and Reduction
What do electron carriers do? Give examples
What are the 4 metabolic stages of cellular Respiration?
What does ATP synthase do?
Glycolysis
What does Glycolysis do?
Why is it considered an inefficient way of extracting energy?
What is the summary of Glycolysis? What goes in and what comes out as reactants, products
and energy?
How many organisms undergo Glycolysis?
What comes after Glycolysis if there is no O2?
What comes after Glycolysis if there is O2?
What organisms use Lactic acid fermentation? and what organisms use Alcohol fermentation?
The Krebs cycle
What happens to the pyruvate if O2 is present?
Describe the Mitochondria
How do Mitochondria divide? What is the endosymbiosis theory?
What are the main products of the krebs cycle? And how many ATP s are produced during the 2
cycles?
So, why is the krebs cycle so important if such little amount of ATP is produced?

2. 36- What is the net gain of energy and electron carriers of the Krebs cycle?
Electron Transport chain
37- What is the electron transport chain? And what is its main role in Respiration?
38- Explain how the transfer of H+ and electrons power the proton pumps?
39- How do the excess protons diffuse back into the inner mitochondrial membrane? What
significance does this have?
40- What is Chemiosmosis?
41- How many ATPs are produced in the ETC?
42- What happens if O2 is not available?
43- So, why do we breathe O2?
Control of cell respiration
44- What molecule enters the Krebs cycle(hint it is generated from glycolysis) and what are the
products of the Krebs cycle (3)?
45- What is the name of the chemical reaction that breaks down polysaccharides to glucose?
46- What is the name of the chemical reaction that breaks down proteins into amino acids (hint it is
the same as 45)?
47- In protein break down which part of the amino acid is discarded and How? And which part is
recycled and into what cycle?
48-What are the products(2) of fatty acid catabolism (break down) and how are these products
recycled?
49-Do carbohydrates or fats generate more energy and what structural properties of each molecule
characterizes this difference (hint think about Cs and Os).
50-How are metabolic reactions regulated through enzymes (3)?
51-What happens if there is a surplus of energy (hint opposite of catabolism)?
52-What is gluconeogenesis and when would this form of anabolism take place?
53-What happens if there is a surplus of acetyl CoA?
54-How many essential amino acids are there and how many are non-essential? (hint there are 20 in
total)
55What product from glycolysis and what products from the Krebs cycle are used to produce nucleic
acids (what makes up DNA, high energy compounds, and RNA)?
56-Acetyl CoA is involved in what two functions?
57-What high energy compound inhibits phosphofructokinase and what three reactions produce this
high energy compound?
58-Why is this sort of regulation important?
59-Why do you think metabolic reactions are regulated with their own products rather than other
substances?
60-Generally, at what point in a metabolic pathway does feedback regulation of an enzyme occur? Do
you think it would occur at a reaction where a lot or little energy is required?