chem 210 final exam Questions With
Detailed Answers
T/F nitrogen is called the superglue of the chemical world - Answers-false
.T/F large elements, such as strontium, are common in biomolecules - Answers-false
.T/F the time it takes for a compound to flow through a metabolic pathway is called the
payoff phase - Answers-false
.T/F proteins, carbohydrates, and fats all get broken down into acetyl-CoA - Answers-
true
.T/F a fat is a lipid molecule that is a solid at room temperature - Answers-true
.in DNA, guanine always pairs with ____
A. thymine
B. guanine
C. uracil
D. cytosine
E. both A and B - Answers-D. cytosine
.water is considered a polar solvent due to attractive forces known as hydrogen bonds.
a hydrogen bond is _____
A. a bond that is stronger than a covalent bond
B. an attractive force between molecules where partially positive hydrogen atoms are
attracted to partially negative atoms of F, O, or N
C. the polar O-H bond in water
D. an ionic bond between H and another atom
E. a covalent bond between H and O - Answers-B. an attractive force between
molecules where partially positive hydrogen atoms are attracted to partially negative
atoms of F, O, or N
.what is a unique molecule. which of the following contributes to water's unique place in
the chemical world?
A. the geometry of the molecule
B. the polarity of the O-H bonds
C. the ability of water molecules to hydrogen bond
D. the bond angle of water
E. all of the answers are correct - Answers-E. all of the answers are correct
.the H+ concentration of a solution is 7.9x10^-13M. what is the pH?
, A. -6.70
B. 6.70
C. 11.17
D. -12.1
E. 12.1 - Answers-E. 12.1
.which of the following is the enthalpy change of a reaction?
A. delta G
B. delta S
C. delta H
D. delta F
E. none of the above - Answers-C. delta H
.a globular protein is an example of a protein _____
A. motif
B. conformation
C. secondary structure
D. quaternary structure
E. amino acid - Answers-B. conformation
.any molecule or ion that is necessary for an enzyme's function is called a ____
A. cofactor
B. coreactant
C. coproduct
D. bienzyme
E. both B and C - Answers-A. cofactor
.a(n) ____ is a compound that binds to an enzyme in such a way that the enzyme slows
down or stop the enzyme reactions.
A. ligand
B. substrate
C. inhibitor
D. coenzyme
E. deactivator - Answers-C. inhibitor
.the following are all examples of a carbohydrate's function in cells except____
A. structural role in RNA
B. structural role in DNA
C. intermediate in metabolism
D. basis for building proteins
E. energy source for cells - Answers-D. basis for building proteins
.a particular lipid is a liquid at room temperature, so it is called a(n)___
A. oil
B. fat
C. lipid
Detailed Answers
T/F nitrogen is called the superglue of the chemical world - Answers-false
.T/F large elements, such as strontium, are common in biomolecules - Answers-false
.T/F the time it takes for a compound to flow through a metabolic pathway is called the
payoff phase - Answers-false
.T/F proteins, carbohydrates, and fats all get broken down into acetyl-CoA - Answers-
true
.T/F a fat is a lipid molecule that is a solid at room temperature - Answers-true
.in DNA, guanine always pairs with ____
A. thymine
B. guanine
C. uracil
D. cytosine
E. both A and B - Answers-D. cytosine
.water is considered a polar solvent due to attractive forces known as hydrogen bonds.
a hydrogen bond is _____
A. a bond that is stronger than a covalent bond
B. an attractive force between molecules where partially positive hydrogen atoms are
attracted to partially negative atoms of F, O, or N
C. the polar O-H bond in water
D. an ionic bond between H and another atom
E. a covalent bond between H and O - Answers-B. an attractive force between
molecules where partially positive hydrogen atoms are attracted to partially negative
atoms of F, O, or N
.what is a unique molecule. which of the following contributes to water's unique place in
the chemical world?
A. the geometry of the molecule
B. the polarity of the O-H bonds
C. the ability of water molecules to hydrogen bond
D. the bond angle of water
E. all of the answers are correct - Answers-E. all of the answers are correct
.the H+ concentration of a solution is 7.9x10^-13M. what is the pH?
, A. -6.70
B. 6.70
C. 11.17
D. -12.1
E. 12.1 - Answers-E. 12.1
.which of the following is the enthalpy change of a reaction?
A. delta G
B. delta S
C. delta H
D. delta F
E. none of the above - Answers-C. delta H
.a globular protein is an example of a protein _____
A. motif
B. conformation
C. secondary structure
D. quaternary structure
E. amino acid - Answers-B. conformation
.any molecule or ion that is necessary for an enzyme's function is called a ____
A. cofactor
B. coreactant
C. coproduct
D. bienzyme
E. both B and C - Answers-A. cofactor
.a(n) ____ is a compound that binds to an enzyme in such a way that the enzyme slows
down or stop the enzyme reactions.
A. ligand
B. substrate
C. inhibitor
D. coenzyme
E. deactivator - Answers-C. inhibitor
.the following are all examples of a carbohydrate's function in cells except____
A. structural role in RNA
B. structural role in DNA
C. intermediate in metabolism
D. basis for building proteins
E. energy source for cells - Answers-D. basis for building proteins
.a particular lipid is a liquid at room temperature, so it is called a(n)___
A. oil
B. fat
C. lipid
