BMS 300; LQs EXAM QUESTIONS
AND VERIFIED ANSWERS
A bond in which electrons are shared between atoms is a(n) ______ bond.
- covalent
- hydrogen
- ionic
- dipole moment - ANSWER Covalent
Water molecules are attracted to each other and form _______ bonds.
- hydrogen
- oxygen
- covalent
- ionic - ANSWER Hydrogen
Which of the following can describe a hydrophilic molecule?
- charged ion
- non-polar
- water loving
- water fearing - ANSWER - charged ion
- water loving
Na+ will be attracted to what portion of a water molecule?
- oxygen
- hydrogen
- none of it - ANSWER Oxygen
_______ is the diffusion of water molecules through a semipermeable
membrane from a place of higher water concentration to a place of lower water
concentration until the concentration on both sides is equal.
- Osmosis
- acetylation
- hydration - ANSWER Osmosis
,In triglycerides, a fatty acid is joined to glycerol by a(n) ______ bond.
- ester
- hydrogen
- ionic
- covalent - ANSWER - Ester
- Covalent
Two solutions are separated by a membrane that contains only channels
permeable to water (aquaporins). The solution in the left compartment contains
30mm NaCl, which dissociates completely, and the right compartment contains
60mm urea which is a small, charged molecule that does not dissociate. Which
of the following statements is correct?
- Water will not flow because osmotic forces are balanced
- water will flow from right to left because the osmotic concentration of the
NaCl is higher
- water will flow from left to right because the osmotic concentration of the urea
is higher
- urea will diffuse from right to left - ANSWER Water will not flow because
osmotic forces are balanced
The portion of an amino acid that differentiates one amino acid from another is
the _______.
- r group
- p group
- c terminus
- n terminus - ANSWER R-Group
In order to form a chain of amino acids, multiple amino acids are linked via
what bond?
- peptide bond
- covalent bond
- ionic bond
- hydrogen bond - ANSWER - Peptide bond
- covalent bond
Triglycerides are composed of 1 long chain fatty acid and 3 glycerols
- True
- False - ANSWER False
,Which of the following is the least stable form of phospholipid structure?
- Micelle
- liposome
- planar bilayer - ANSWER Micelle
Match the protein terminus with its correct structure
1. Amino Terminus =
2. Carboxy Terminus =
- H2O
- NH2
- COOH - ANSWER 1. NH2
2. COOH
________ interact with water to form ________ structure of proteins.
- R-groups, secondary
- R-groups, tertiary
- Hydrogen bonds, secondary
- hydrogen bonds, tertiary - ANSWER R-Groups, tertiary
R-Groups can be...
- charged
- uncharged
- polar
- all of them
- none of them - ANSWER All of them
The amino acids that can be found on the outside of a protein when placed in
water are:
- hydrophilic
- hydrophobic - ANSWER hydrophilic
Alpha helices form due to ________ bonding of amino acids ________ the
strand
- hydrogen, within
- hydrogen, outside
- covalent, within
- covalent, outside - ANSWER Hydrogen, within
, Urea can be used to "denature" a protein by disrupting hydrogen bonds. A
denature protein would most likely be in the _______ structure.
- primary
- secondary
- tertiary
- quaternary - ANSWER Primary
SARS COV2 binds to cells using its:
- ACE2 receptor
- RNA
- spike protein
- TMPRSS2 protein - ANSWER Spike protein
Which of the following protein types are synthesized at the endoplasmic
reticulum?
- cytoplasmic proteins
- transmembrane proteins
- secreted proteins
- lysosomal proteins - ANSWER - transmembrane proteins
- secreted proteins
- lysosomal proteins
Which of the following is found in eukaryotes but not prokaryotes?
- DNA
- RNA
- ribosomes
- mitochondria
- plasma membrane - ANSWER mitochondria
In eukaryotes, DNA is sequestered in the nucleus.
- True
- False - ANSWER True
Rough endoplasmic reticulum is rough because it is covered with ________.
- mitochondria
- ribosomes
- reticulum
AND VERIFIED ANSWERS
A bond in which electrons are shared between atoms is a(n) ______ bond.
- covalent
- hydrogen
- ionic
- dipole moment - ANSWER Covalent
Water molecules are attracted to each other and form _______ bonds.
- hydrogen
- oxygen
- covalent
- ionic - ANSWER Hydrogen
Which of the following can describe a hydrophilic molecule?
- charged ion
- non-polar
- water loving
- water fearing - ANSWER - charged ion
- water loving
Na+ will be attracted to what portion of a water molecule?
- oxygen
- hydrogen
- none of it - ANSWER Oxygen
_______ is the diffusion of water molecules through a semipermeable
membrane from a place of higher water concentration to a place of lower water
concentration until the concentration on both sides is equal.
- Osmosis
- acetylation
- hydration - ANSWER Osmosis
,In triglycerides, a fatty acid is joined to glycerol by a(n) ______ bond.
- ester
- hydrogen
- ionic
- covalent - ANSWER - Ester
- Covalent
Two solutions are separated by a membrane that contains only channels
permeable to water (aquaporins). The solution in the left compartment contains
30mm NaCl, which dissociates completely, and the right compartment contains
60mm urea which is a small, charged molecule that does not dissociate. Which
of the following statements is correct?
- Water will not flow because osmotic forces are balanced
- water will flow from right to left because the osmotic concentration of the
NaCl is higher
- water will flow from left to right because the osmotic concentration of the urea
is higher
- urea will diffuse from right to left - ANSWER Water will not flow because
osmotic forces are balanced
The portion of an amino acid that differentiates one amino acid from another is
the _______.
- r group
- p group
- c terminus
- n terminus - ANSWER R-Group
In order to form a chain of amino acids, multiple amino acids are linked via
what bond?
- peptide bond
- covalent bond
- ionic bond
- hydrogen bond - ANSWER - Peptide bond
- covalent bond
Triglycerides are composed of 1 long chain fatty acid and 3 glycerols
- True
- False - ANSWER False
,Which of the following is the least stable form of phospholipid structure?
- Micelle
- liposome
- planar bilayer - ANSWER Micelle
Match the protein terminus with its correct structure
1. Amino Terminus =
2. Carboxy Terminus =
- H2O
- NH2
- COOH - ANSWER 1. NH2
2. COOH
________ interact with water to form ________ structure of proteins.
- R-groups, secondary
- R-groups, tertiary
- Hydrogen bonds, secondary
- hydrogen bonds, tertiary - ANSWER R-Groups, tertiary
R-Groups can be...
- charged
- uncharged
- polar
- all of them
- none of them - ANSWER All of them
The amino acids that can be found on the outside of a protein when placed in
water are:
- hydrophilic
- hydrophobic - ANSWER hydrophilic
Alpha helices form due to ________ bonding of amino acids ________ the
strand
- hydrogen, within
- hydrogen, outside
- covalent, within
- covalent, outside - ANSWER Hydrogen, within
, Urea can be used to "denature" a protein by disrupting hydrogen bonds. A
denature protein would most likely be in the _______ structure.
- primary
- secondary
- tertiary
- quaternary - ANSWER Primary
SARS COV2 binds to cells using its:
- ACE2 receptor
- RNA
- spike protein
- TMPRSS2 protein - ANSWER Spike protein
Which of the following protein types are synthesized at the endoplasmic
reticulum?
- cytoplasmic proteins
- transmembrane proteins
- secreted proteins
- lysosomal proteins - ANSWER - transmembrane proteins
- secreted proteins
- lysosomal proteins
Which of the following is found in eukaryotes but not prokaryotes?
- DNA
- RNA
- ribosomes
- mitochondria
- plasma membrane - ANSWER mitochondria
In eukaryotes, DNA is sequestered in the nucleus.
- True
- False - ANSWER True
Rough endoplasmic reticulum is rough because it is covered with ________.
- mitochondria
- ribosomes
- reticulum
