Portage Learning CHEM 210
Biochemistry Final Exam Questions
And Answers
/.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
/.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)
/.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
/.In a particular cell, molecule X binds near the active site on an enzyme causing it to
slow catalyzing reactions. Molecules X is called what? - Answer-✅uncompetitive
inhibitor
Biochemistry Final Exam Questions
And Answers
/.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
/.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)
/.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
/.In a particular cell, molecule X binds near the active site on an enzyme causing it to
slow catalyzing reactions. Molecules X is called what? - Answer-✅uncompetitive
inhibitor
