BMS 300 EXAM 1 QUESTIONS WITH VERIFIED
ACCURATE ANSWERS
What is a histone?
A. A protein found in prokaryotic cell nuclei that facilitates transport of DNA from inside
the nucleus to the cytoplasm.
B. A protein found in eukaryotic cell nuclei that package and order the DNA into
structural units called nucleosomes.
C. A protein found in eukaryotic cell nuclei that facilitates transport of DNA from inside
the nucleus to the cytoplasm.
D. A protein found in prokaryotic cell nuclei that package and order the DNA into
structural units called nucleosomes. - Answers - B
True/False: Prokaryotes organize their cellular machinery in membrane bound
organelles. - Answers - False
True/False: Excluding mitosis/meiosis, DNA never leaves the nucleus - Answers - True
Eukaryotic DNA is organized:
A. by winding around histones to condense into chromosomes found in the nucleus.
B. by winding around ribosomes to condense into chromosomes found in the nucleus.
C. by winding around histones to condense into a ring-like struture located in the
cytoplasm - Answers - A
_________________ are the synthesis proteins - Answers - Ribosomes
_________________ allows RNA to leave the nucleus and enter into the cytoplasm -
Answers - Nuclear Pores
DNA --> RNA --> Protein ='s - Answers - The Central Dogma
Water molecules are attracted to each other and form ________ bonds. - Answers -
Hydrogen (: (: (:
A bond in which electrons are shared between atoms is a _______ bond. - Answers -
Covalent
,Which of the following is NOT true about hydrophilic molecules?
A. they interact with the dipole moment in water
B. They diffuse easily in water
C. They have equal sharing of electrons across all the atoms in the molecule - Answers
-C
__________ pressure is the driving force of water through aquaporins
A. Hydrostatic
B. Osmotic
C. Ionic - Answers - B
True/False: Triglycerides are composed of 1 long chain fatty acid and three glycerols -
Answers - False - 1 glycerol and 3 fatty acids
In triglycerides, a fatty acid is joined to glycerol by a(n) __________ bond
A. Ionic
B. Covalent
C. Hydrogen - Answers - B - an ester bond is also a covalent bond
Two solutions are separated by a membrane that contains only channels permeable to
water (aquaporins). The solution in the left-hand compartment contains 30 millimolar
NaCl, which dissociates completely, and the right hand compartment contains 60
millimolar urea which is a small, charged molecule that does not dissociate. Which of
the following statements is correct?
A. Water will flow from right to left because the osmotic concentration of the NaCl is
higher.
B. Water will not flow because osmotic forces are balanced.
C. Urea will diffuse from right to left.
D. Water will flow from left to right because the osmotic concentration of the urea is
higher. - Answers - B
, The portion of an amino acid that differentiates one amino acid from another is the
_____.
A. C- terminus
B. P-group
C. R- group
D. N-terminus - Answers - C
Hydrogen bonding takes place WITHIN amino acid strand - Answers - Alpha Helix
Hydrogen bonding takes place BETWEEN amino acid strand - Answers - Beta Sheet
In order to form a chain of amino acids, multiple amino acids are linked via what bond?
Select all that apply.
A. Hydrogen bonds
B. Ionic bond
C. Peptide bond
D. Covalent bond - Answers - C and D
In a phospholipid bilayer, how would hydrophobic and hydrophilic R groups of a
transmembrane protein orientate themselves? Hydrophillic R groups - Answers - Face
inward to form a polar/charged channel
In a phospholipid bilayer, how would hydrophobic and hydrophilic R groups of a
transmembrane protein orientate themselves? Hydrophobic R groups - Answers - face
outward to interact with phospholipid tails
True/False: Alpha helices are more likely to be found spanning membranes than beta
sheets. - Answers - True
_________________ interact with water to form the _________ structure of proteins.
A. Hydrogen bonds, tertiary
B. R-groups, seconday
C. Hydrogen bonds, secondary
D. R-groups, tertiary - Answers - C
ACCURATE ANSWERS
What is a histone?
A. A protein found in prokaryotic cell nuclei that facilitates transport of DNA from inside
the nucleus to the cytoplasm.
B. A protein found in eukaryotic cell nuclei that package and order the DNA into
structural units called nucleosomes.
C. A protein found in eukaryotic cell nuclei that facilitates transport of DNA from inside
the nucleus to the cytoplasm.
D. A protein found in prokaryotic cell nuclei that package and order the DNA into
structural units called nucleosomes. - Answers - B
True/False: Prokaryotes organize their cellular machinery in membrane bound
organelles. - Answers - False
True/False: Excluding mitosis/meiosis, DNA never leaves the nucleus - Answers - True
Eukaryotic DNA is organized:
A. by winding around histones to condense into chromosomes found in the nucleus.
B. by winding around ribosomes to condense into chromosomes found in the nucleus.
C. by winding around histones to condense into a ring-like struture located in the
cytoplasm - Answers - A
_________________ are the synthesis proteins - Answers - Ribosomes
_________________ allows RNA to leave the nucleus and enter into the cytoplasm -
Answers - Nuclear Pores
DNA --> RNA --> Protein ='s - Answers - The Central Dogma
Water molecules are attracted to each other and form ________ bonds. - Answers -
Hydrogen (: (: (:
A bond in which electrons are shared between atoms is a _______ bond. - Answers -
Covalent
,Which of the following is NOT true about hydrophilic molecules?
A. they interact with the dipole moment in water
B. They diffuse easily in water
C. They have equal sharing of electrons across all the atoms in the molecule - Answers
-C
__________ pressure is the driving force of water through aquaporins
A. Hydrostatic
B. Osmotic
C. Ionic - Answers - B
True/False: Triglycerides are composed of 1 long chain fatty acid and three glycerols -
Answers - False - 1 glycerol and 3 fatty acids
In triglycerides, a fatty acid is joined to glycerol by a(n) __________ bond
A. Ionic
B. Covalent
C. Hydrogen - Answers - B - an ester bond is also a covalent bond
Two solutions are separated by a membrane that contains only channels permeable to
water (aquaporins). The solution in the left-hand compartment contains 30 millimolar
NaCl, which dissociates completely, and the right hand compartment contains 60
millimolar urea which is a small, charged molecule that does not dissociate. Which of
the following statements is correct?
A. Water will flow from right to left because the osmotic concentration of the NaCl is
higher.
B. Water will not flow because osmotic forces are balanced.
C. Urea will diffuse from right to left.
D. Water will flow from left to right because the osmotic concentration of the urea is
higher. - Answers - B
, The portion of an amino acid that differentiates one amino acid from another is the
_____.
A. C- terminus
B. P-group
C. R- group
D. N-terminus - Answers - C
Hydrogen bonding takes place WITHIN amino acid strand - Answers - Alpha Helix
Hydrogen bonding takes place BETWEEN amino acid strand - Answers - Beta Sheet
In order to form a chain of amino acids, multiple amino acids are linked via what bond?
Select all that apply.
A. Hydrogen bonds
B. Ionic bond
C. Peptide bond
D. Covalent bond - Answers - C and D
In a phospholipid bilayer, how would hydrophobic and hydrophilic R groups of a
transmembrane protein orientate themselves? Hydrophillic R groups - Answers - Face
inward to form a polar/charged channel
In a phospholipid bilayer, how would hydrophobic and hydrophilic R groups of a
transmembrane protein orientate themselves? Hydrophobic R groups - Answers - face
outward to interact with phospholipid tails
True/False: Alpha helices are more likely to be found spanning membranes than beta
sheets. - Answers - True
_________________ interact with water to form the _________ structure of proteins.
A. Hydrogen bonds, tertiary
B. R-groups, seconday
C. Hydrogen bonds, secondary
D. R-groups, tertiary - Answers - C
