BioChem 210 Final Exam - Portage Learning
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T/F: Hydrogen is called the superglue of the chemical world. - (ANSWER)false
carbon = superglue of the world
T/F: Small elements, such as nitrogen, are common in biomolecules. - (ANSWER)true
Small elements that are common in biomolecules: - (ANSWER)CHOPS N:
- carbon
- hydrogen
- oxygen
- phosphorous
- sulfur
- nitrogen
T/F: The time it takes for a compound to flow through a metabolic pathway is called the flux. -
(ANSWER)true
T/F: Proteins, carbohydrates, and fats all get broken down into NADH and FADH2 in energy production. -
(ANSWER)true
T/F: A fat is a lipid molecules that is a liquid at room temperature. - (ANSWER)false
In RNA, guanine always pairs with: - (ANSWER)cytosine
,BioChem 210 Final Exam - Portage Learning
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In RNA, adenine always pairs with: - (ANSWER)uracil
In DNA, adenine always pairs with: - (ANSWER)thymine
Water is considered a polar solvent due to attractive forces known as hydrogen bonds. A hydrogen bond
is: - (ANSWER)an attractive force between molecules where partially positive hydrogen atoms are
attracted to partially negative atoms of F, O, or N
What is a London force? - (ANSWER)a temporary attraction between atoms due to electron alignment
What is a dipole-dipole force? - (ANSWER)an attraction between the positive end of one polar molecule
and the negative end of another
What attributes contribute to water's unusual properties? - (ANSWER)1. geometry of the molecule
2. polarity of the -OH bonds
3. ability of water molecules to hydrogen bond
4. body angle of water molecules to H bond
The H+ concentration of a solution is 7.9 x 10^-13 M. What is the pH? - (ANSWER)12.1
pH = -log(7.9 x 10^-13)
, BioChem 210 Final Exam - Portage Learning
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What represents the free-energy change of a reaction? - (ANSWER)ΔG = Gibbs free energy
What is the measure of heat content in a reaction? - (ANSWER)ΔH = enthalpy
What is the measure of order of the system in a reaction? - (ANSWER)ΔS = entropy
A fibrous protein is an example of a protein ___. - (ANSWER)conformation
What is an example of protein conformation? - (ANSWER)fibrous and globular
Any molecule or ion that is necessary for an enzyme's function is called: - (ANSWER)cofactor
In a particular cell, molecules X binds to an enzyme causing to stop catalyzing reactions. Molecule X is
called what? - (ANSWER)inhibitor
What is the function of lipids in cells? - (ANSWER)1. energy source/storage
2. structural role in membranes (myelin sheaths)
3. vitamins
4. basis for dye molecules (carotenoids)
What is the function of carbohydrates in cells? - (ANSWER)1. structural role in DNA and RNA
2. intermediate in metabolism
3. energy source for cells
| () Already Graded A+
T/F: Hydrogen is called the superglue of the chemical world. - (ANSWER)false
carbon = superglue of the world
T/F: Small elements, such as nitrogen, are common in biomolecules. - (ANSWER)true
Small elements that are common in biomolecules: - (ANSWER)CHOPS N:
- carbon
- hydrogen
- oxygen
- phosphorous
- sulfur
- nitrogen
T/F: The time it takes for a compound to flow through a metabolic pathway is called the flux. -
(ANSWER)true
T/F: Proteins, carbohydrates, and fats all get broken down into NADH and FADH2 in energy production. -
(ANSWER)true
T/F: A fat is a lipid molecules that is a liquid at room temperature. - (ANSWER)false
In RNA, guanine always pairs with: - (ANSWER)cytosine
,BioChem 210 Final Exam - Portage Learning
| () Already Graded A+
In RNA, adenine always pairs with: - (ANSWER)uracil
In DNA, adenine always pairs with: - (ANSWER)thymine
Water is considered a polar solvent due to attractive forces known as hydrogen bonds. A hydrogen bond
is: - (ANSWER)an attractive force between molecules where partially positive hydrogen atoms are
attracted to partially negative atoms of F, O, or N
What is a London force? - (ANSWER)a temporary attraction between atoms due to electron alignment
What is a dipole-dipole force? - (ANSWER)an attraction between the positive end of one polar molecule
and the negative end of another
What attributes contribute to water's unusual properties? - (ANSWER)1. geometry of the molecule
2. polarity of the -OH bonds
3. ability of water molecules to hydrogen bond
4. body angle of water molecules to H bond
The H+ concentration of a solution is 7.9 x 10^-13 M. What is the pH? - (ANSWER)12.1
pH = -log(7.9 x 10^-13)
, BioChem 210 Final Exam - Portage Learning
| () Already Graded A+
What represents the free-energy change of a reaction? - (ANSWER)ΔG = Gibbs free energy
What is the measure of heat content in a reaction? - (ANSWER)ΔH = enthalpy
What is the measure of order of the system in a reaction? - (ANSWER)ΔS = entropy
A fibrous protein is an example of a protein ___. - (ANSWER)conformation
What is an example of protein conformation? - (ANSWER)fibrous and globular
Any molecule or ion that is necessary for an enzyme's function is called: - (ANSWER)cofactor
In a particular cell, molecules X binds to an enzyme causing to stop catalyzing reactions. Molecule X is
called what? - (ANSWER)inhibitor
What is the function of lipids in cells? - (ANSWER)1. energy source/storage
2. structural role in membranes (myelin sheaths)
3. vitamins
4. basis for dye molecules (carotenoids)
What is the function of carbohydrates in cells? - (ANSWER)1. structural role in DNA and RNA
2. intermediate in metabolism
3. energy source for cells
