MCB Quiz 2 Questions With Complete Solutions
pH - (ANSWER)-is a measure of the concentration of protons (H+) in a solution.
-is measured as a negative log of the [H+]: high pH means low [H+], and low pH means a high [H+]
The class of organic molecules defined by a physical property rather than a structure are the: -
(ANSWER)-Carbohydrates
-Lipids
Humans are often referred to as "carbon-based" life forms. Given that humans breathe oxygen,
shouldn't they be referred to as "oxygen-based" life forms? - (ANSWER)-No, because carbon, not
oxygen, is the most abundant element in cells.
Helicase is an enzyme that separates the double helix of the DNA into two separate strands. How do you
think helicase does this? - (ANSWER)- By breaking H bonds
Fatty acids - (ANSWER)-can differ in the length of their hydrocarbon chains.
-can differ in the number of H-C bonds; more H-C leads to saturated fats; fewer H-C bonds (and thus
more double C=C bonds) leads to unsaturated fats.
-are lipids.
Which one of the following components of an amino acid differs from one amino acid to another? -
(ANSWER)The R Group - Side chain
Regarding the Central Dogma of molecular biology - (ANSWER)-translation refers to the synthesis of a
protein (a sequence of amino acids) from an RNA template.
-transcription refers to the synthesis of an RNA, using a DNA template.
The process of copying DNA is called - (ANSWER)Replication
pH - (ANSWER)-is a measure of the concentration of protons (H+) in a solution.
-is measured as a negative log of the [H+]: high pH means low [H+], and low pH means a high [H+]
The class of organic molecules defined by a physical property rather than a structure are the: -
(ANSWER)-Carbohydrates
-Lipids
Humans are often referred to as "carbon-based" life forms. Given that humans breathe oxygen,
shouldn't they be referred to as "oxygen-based" life forms? - (ANSWER)-No, because carbon, not
oxygen, is the most abundant element in cells.
Helicase is an enzyme that separates the double helix of the DNA into two separate strands. How do you
think helicase does this? - (ANSWER)- By breaking H bonds
Fatty acids - (ANSWER)-can differ in the length of their hydrocarbon chains.
-can differ in the number of H-C bonds; more H-C leads to saturated fats; fewer H-C bonds (and thus
more double C=C bonds) leads to unsaturated fats.
-are lipids.
Which one of the following components of an amino acid differs from one amino acid to another? -
(ANSWER)The R Group - Side chain
Regarding the Central Dogma of molecular biology - (ANSWER)-translation refers to the synthesis of a
protein (a sequence of amino acids) from an RNA template.
-transcription refers to the synthesis of an RNA, using a DNA template.
The process of copying DNA is called - (ANSWER)Replication
