Cellular Respiration
Presentation
•
Biology
•
10th Grade
•
Practice Problem
•
Medium
+1
Standards-aligned
Brianne Schumacher
Used 25+ times
FREE Resource
10 Slides • 9 Questions
1
Cellular Respiration
2
Glycolysis
Takes place in cytoplasm
Breaks a glucose molecule into 2 pyruvic acid molecules
Produces 2 ATP & 2 NADH
3
Krebs Cycle
Occurs in mitochondria and must run 2 times to complete the metabolism of glucose
Involves the breakdown of pyruvic acid into carbon dioxide
Produces 2 ATP, 8 NADH, and 2 FADH2
4
Electron Transport Chain
Involves the build up of a concentration gradient to use the energy released via diffusion to make ATP
NADH and FADH2 release hydrogens that give up electrons ("free electricity") to power the active transport of H+
Requires oxygen to complete the process (aerobic process)
Produces water and large amounts of ATP
5
6
Poll
What are the consequences of a proton gradient?
To create an environment with a different pH
To create an electrical charge across a membrane
As a form of potential energy storage
To power chemical reactions like the spinning of a flagellum, the transport of ions and molecules across a membrane, and the synthesis of ATP
7
What important characteristic of the inner membrane allows for this gradient to be established and maintained?
Semi-permeability - the lipid bilayer's nonpolar zone prevents the H+ ions from diffusing back through the membrane
8
Multiple Choice
If you “poke a hole” in the inner membrane such that protons can freely move across it, what would happen to the proton distribution across the inner membrane?
It will not change
the concentration gradient will get larger as protons move across the membrane
the protons will diffuse back across the membrane dissipating the concentration gradient
9
Multiple Choice
If you “poke a hole” in the inner membrane such that protons can freely move across it, what would happen to the amount of ATP produced by the mitochondria?
it will increase
it will decrease
it will remain the same
10
Open Ended
Most ATP is consumed soon after its production. The cell has ways of detecting how much ATP is produced and needs to keep its supply constant.
If you poke a hole through the inner membrane, what might the cell do to try to adapt to the change and reestablish previous levels of ATP?
11
12
Multiple Select
What happens to ATP and glucose oxidation levels in response to treatment with DNP
they are balanced
they don't change
glucose oxidation increases
ATP levels decrease
13
What could cause the effects shown in the graph?
Remember that DNP is a “mitochondrial uncoupler.” An uncoupler is a chemical that disconnects two linked biological processes.
14
Multiple Select
Review the list of physiological effects that DNP has on the body (list as many as possible). Which of these effects are energy-related?
weight loss
fever
cataracts
rash
15
Multiple Select
What linked processes does DNP uncouple?
glycolysis
Krebs cycle
proton gradient
ATP synthesis
16
Uncoupling
By introducing a 'hole' in the mitochondrial membrane, the proton gradient will dissipate. If this occurs, then the protons can't be used for ATP production. The cell will respond by increasing the metabolism of glucose to try to make up for the lack of ATP.
17
18
Open Ended
For an athlete, what are the consequences of ATP depletion?
19
Poll
Should Connor take DNP to lose weight?
Yes
No
Cellular Respiration
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