BIO 201 Homework 4
Rank these reactions from least to most energetically favorable.
1. Glucose to Glucose-6-P, +3.3kcal/mol
2. Glucose-6-P to Fructose-6-P, +0.4kcal/mol
3. ATP to ADP and Pi, -7.3kcal/mol
4. PEP to pyruvate, -14.8kcal/mol
Molecules capable of enzymatic activity include...
RNA and proteins
Based on the animation, which of the following observations is true?
The product from one reaction served as the substrate for the next reaction.
In a biochemical pathway, the product released by the first enzyme becomes the
substrate for the second enzyme.
True
What function do many B vitamins serve in the production of energy?
they function as co-enzymes
Enzymes catalyze reactions by
lowering activation energy.
In the example shown, which best describes the role of thiamine pyrophosphate in the
reaction to cleave pyruvate?
it behaves like a catalyst and is not consumed in the reaction
If thiamine pyrophosphate was not available to the enzyme in the animation which of the
following would occur?
The enzyme would not be able to cleave pyruvate.
Sucrase uses ____ to cleave sucrose into two monosaccharides.
Water
What happens to sucrase when it binds to sucrose?
Sucrase goes through a conformational change.
How often can a sucrase molecule be used to hydrolyze sucrose?
many times
Rank these reactions from least to most energetically favorable.
1. Glucose to Glucose-6-P, +3.3kcal/mol
2. Glucose-6-P to Fructose-6-P, +0.4kcal/mol
3. ATP to ADP and Pi, -7.3kcal/mol
4. PEP to pyruvate, -14.8kcal/mol
Molecules capable of enzymatic activity include...
RNA and proteins
Based on the animation, which of the following observations is true?
The product from one reaction served as the substrate for the next reaction.
In a biochemical pathway, the product released by the first enzyme becomes the
substrate for the second enzyme.
True
What function do many B vitamins serve in the production of energy?
they function as co-enzymes
Enzymes catalyze reactions by
lowering activation energy.
In the example shown, which best describes the role of thiamine pyrophosphate in the
reaction to cleave pyruvate?
it behaves like a catalyst and is not consumed in the reaction
If thiamine pyrophosphate was not available to the enzyme in the animation which of the
following would occur?
The enzyme would not be able to cleave pyruvate.
Sucrase uses ____ to cleave sucrose into two monosaccharides.
Water
What happens to sucrase when it binds to sucrose?
Sucrase goes through a conformational change.
How often can a sucrase molecule be used to hydrolyze sucrose?
many times
