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Top Hat Questions (Metabolism, Cellular Respiration, Photosynthesis)
Terms in this set (24)
The form of energy that typically is LEAST useful to life is energy in
the form of heat
How do living organisms create macromolecules, organelles, tissues, cells and other complex higher-order structures.
living organisms create order by using energy from the sun
Are most chemical reactions at equilibrium in living cell?
When a system is at equilibrium ....
No net change takes place and no work can be done
ATP is a ....
The oxidation of glucose to carbon dioxide and water is highly exergonic: deltaG = -636 kcal/mole? Why doesn't glucose spontaneously combust?
The glucose molecules lack the activation energy at room temperature.
How do enzymes speed up reactions?
Enzymes lower the activation energy needed for the reaction.
Which of these forms of inhibition could be overcome by adding more substrate?
A change in the coding region of the gene leads to an amino acid substitution in an enzyme. Which property of the enzyme could be changed as a result?
its ability to bind its substrate, its overall shape, and its ability to be affected by allosteric regulators
When electrons move closer to oxygen during cellular respiration
energy is released
How will a healthy individual's ATP production change during an eight hour fast?
The individuals ATP production will not change significantly although they haven't eaten.
_____ is the end product of glycolysis. It is oxydized into _____, which enters the citric acid cycle.
pyruvate, acetyl CoA
Some drugs allow protons (H+) to diffuse across the inner mitochondrial membrane. When such a drug is added, what will happen to ATP synthesis?
ATP synthesis will decrease
Without oxygen what will happen to the electron transport train?
Electron transfer will stop
Which steps of glucose metabolism convert to NAD+ --> NADH?
glycolysis, citric acid cycle, and conversion of pyruvate to acetyl coA
If ATP concentration in the cell is high, what do you predict will happen to the rate of glucose oxidation?
There is already a lot of ATP, so oxidation of glucose will slow down
Adenosine monophosphate (AMP) increases the rate of the phosphofructoskinase-mediated reaction by binding at a site distinct from the substrate binding site. This is an example of _____.
Through beta-oxidation, fatty acids are converted to acetyl CoA. Entering the pathway as acetyl-CoA bypasses which part of aerobic respiration?
During intense exercise, muscles have oxygen, but levels are insufficient. Which processes will be running in these cells?
Glycolysis, lactic acid fermentation, oxidative phosphorylation
During intese exercise, muscles go into anearobiosis, the body will increase its consumption of ____?
Think about a little acorn. A log from an oak tree may weigh 10,000x as much of the acorn. Where has MOST of the mass of a dead log come from?
Which wavelengths of light do you predict are best for photosynthesis?
red, blue and violet
What would happen to an enzyme pathway if enzyme 2 was missing?
Intermediate molecule B would accumulate and product D would not be produced.
A reaction has a deltaG of -5.6 kcal/mol. Which of the following would most likely be true?
The reaction would proceed by itself but it might be very slow.
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