Bi 1A Practice Midterm 1 B
Multiple-choice questions are 2 pts each, unless otherwise specified. Questions 1-4 are based on
the image below. (copyright: W. H. Freeman and Co, 2008)
1. This structure is a ________________ (Choose the answer that best fills in the blanks).
A) Sugar monomer B) Nucleic acid monomer
C) Amino acid monomer D) Polymer of carbohydrates
E) Polymer of nucleic acids F) Polymer of amino acids
2. The portion of the structure surrounded by and therefore _______________
a dotted line would be expected to be _________________
A) Nonpolar; hydrophobic C) Nonpolar; hydrophilic
B) Polar; hydrophobic D) Polar; hydrophilic
A) Nonpolar; hydrophobic C) Nonpolar; hydrophilic
3. This structure was assembled from smaller together into the larger structure, what happened?
pieces. Every time two of these pieces were bound
A) A water molecule was added to the structure.
B) A water molecule was released from the reaction.
C) A carbon dioxide molecule was added to the structure.
D) A carbon dioxide molecule was released from the reaction.
4. The linear sequence of side chains in this molecule most directly represents part of the
___________ structure of a protein.
A) Primary B) Secondary C) Tertiary D) Quaternary
5. The single lines in the structure above (between C and C, for example, or between C and N)
represent...
A) Hydrogen bonds between oppositely charged atoms
B) Covalent bonds between oppositely charged atoms
This study source was downloaded by 100000844460766 from CourseHero.com on 05-10-2022 14:13:35 GMT -05:00
https://www.coursehero.com/file/145187472/Bi-1A-Practice-Midterm-1-Bpdf/
, C) Hydrogen bonds in which a pair of electrons is shared
D) Covalent bonds in which a pair of electrons is shared
-----
6. A person who cannot digest milk sugar is said to have lactose intolerance. Describe what
causes lactose intolerance, using all of the following terms correctly. (6 pts, 3-4
sentences)
Bacteria Disaccharide Enzyme Lactase Lactose Monosaccharide
Lactose intolerance occurs when a person has a genetic variant that causes them to
not make the lactase enzyme as an adult This enzyme breaks down lactose, a
disaccharide, into its monosaccharide units. Without lactase, the lactose sugar is
broken down by bacteria in the gut instead, making gas.
7. Which one of the following statements about macromolecules is false? (CHOOSE ONE)
A) Complex carbohydrates are polymers of sugar.
B) Lipids are polymers of fatty acids.
C) Proteins are polymers of amino acids.
D) Nucleic acids are polymers of nucleotides.
8. Draw three water molecules, labelling partial charges, H atoms, and O atoms
clearly.
Depict hydrogen bonds using dotted lines. (5 pts)
O-H-H---H-O-H---O-H-H
9. Which of the following statements about diabetes mellitus is FALSE? (NOT ON EXAM)
A) Type I diabetes often begins early in life.
B) In Type I diabetes, the pancreas does not produce insulin
C) In type II diabetes, the body does not respond to insulin as effectively.
D) Type I diabetes does not require insulin injections; type II diabetes does.
10a The dry mass of a tree is primarily made of...
A) Water and minerals from the soil
B) Gas from the air
This study source was downloaded by 100000844460766 from CourseHero.com on 05-10-2022 14:13:35 GMT -05:00
https://www.coursehero.com/file/145187472/Bi-1A-Practice-Midterm-1-Bpdf/
Multiple-choice questions are 2 pts each, unless otherwise specified. Questions 1-4 are based on
the image below. (copyright: W. H. Freeman and Co, 2008)
1. This structure is a ________________ (Choose the answer that best fills in the blanks).
A) Sugar monomer B) Nucleic acid monomer
C) Amino acid monomer D) Polymer of carbohydrates
E) Polymer of nucleic acids F) Polymer of amino acids
2. The portion of the structure surrounded by and therefore _______________
a dotted line would be expected to be _________________
A) Nonpolar; hydrophobic C) Nonpolar; hydrophilic
B) Polar; hydrophobic D) Polar; hydrophilic
A) Nonpolar; hydrophobic C) Nonpolar; hydrophilic
3. This structure was assembled from smaller together into the larger structure, what happened?
pieces. Every time two of these pieces were bound
A) A water molecule was added to the structure.
B) A water molecule was released from the reaction.
C) A carbon dioxide molecule was added to the structure.
D) A carbon dioxide molecule was released from the reaction.
4. The linear sequence of side chains in this molecule most directly represents part of the
___________ structure of a protein.
A) Primary B) Secondary C) Tertiary D) Quaternary
5. The single lines in the structure above (between C and C, for example, or between C and N)
represent...
A) Hydrogen bonds between oppositely charged atoms
B) Covalent bonds between oppositely charged atoms
This study source was downloaded by 100000844460766 from CourseHero.com on 05-10-2022 14:13:35 GMT -05:00
https://www.coursehero.com/file/145187472/Bi-1A-Practice-Midterm-1-Bpdf/
, C) Hydrogen bonds in which a pair of electrons is shared
D) Covalent bonds in which a pair of electrons is shared
-----
6. A person who cannot digest milk sugar is said to have lactose intolerance. Describe what
causes lactose intolerance, using all of the following terms correctly. (6 pts, 3-4
sentences)
Bacteria Disaccharide Enzyme Lactase Lactose Monosaccharide
Lactose intolerance occurs when a person has a genetic variant that causes them to
not make the lactase enzyme as an adult This enzyme breaks down lactose, a
disaccharide, into its monosaccharide units. Without lactase, the lactose sugar is
broken down by bacteria in the gut instead, making gas.
7. Which one of the following statements about macromolecules is false? (CHOOSE ONE)
A) Complex carbohydrates are polymers of sugar.
B) Lipids are polymers of fatty acids.
C) Proteins are polymers of amino acids.
D) Nucleic acids are polymers of nucleotides.
8. Draw three water molecules, labelling partial charges, H atoms, and O atoms
clearly.
Depict hydrogen bonds using dotted lines. (5 pts)
O-H-H---H-O-H---O-H-H
9. Which of the following statements about diabetes mellitus is FALSE? (NOT ON EXAM)
A) Type I diabetes often begins early in life.
B) In Type I diabetes, the pancreas does not produce insulin
C) In type II diabetes, the body does not respond to insulin as effectively.
D) Type I diabetes does not require insulin injections; type II diabetes does.
10a The dry mass of a tree is primarily made of...
A) Water and minerals from the soil
B) Gas from the air
This study source was downloaded by 100000844460766 from CourseHero.com on 05-10-2022 14:13:35 GMT -05:00
https://www.coursehero.com/file/145187472/Bi-1A-Practice-Midterm-1-Bpdf/
