BMS 300 Exam 1 UPDATED ACTUAL
Exam Questions and CORRECT Answers
Codons are on what type of RNA? What does they correspond to? - CORRECT
ANSWER - mRNA
amino acids, start, or stop signals during translation
What is a codon? - CORRECT ANSWER - A three amino acid sequence, or triplet, on the
mRNA
What is a reading frame? - CORRECT ANSWER - A way of organizing the sequence of
nucleotides in a nucleic acid (DNA or RNA) molecule into sets of consecutive, non-overlapping
triplets.
What side are amino acids added to on the amino acid chain? - CORRECT ANSWER - C-
terminus
What is a translocon? - CORRECT ANSWER - A protein located in the membrane of the
ER
When do SRPs bind? - CORRECT ANSWER - When amino acids contain 14-17
consecutive, hydrophobic amino acids
True or False: The TATA box is a sequence in DNA that provides a site for transcription factors
to bind to. - CORRECT ANSWER - True
True or False: The TATA box is also known as a promoter - CORRECT ANSWER - True
True or False: The TATA box is a sequence in RNA that signals that a protein should be
synthesized on the rough ER. - CORRECT ANSWER - False
,True or False: The TATA box is a sequence in RNA that signals the formation of ribosomal
subunits. - CORRECT ANSWER - False
True or False: The TATA box is a sequence in DNA that provides a site for helicase to unwind
DNA. - CORRECT ANSWER - False
In eukaryotes, what happens after RNA is transcribed from DNA? - CORRECT
ANSWER - The RNA is modified to cut out introns before being translated
What part is cut out before being translated? - CORRECT ANSWER - Introns
When are introns cut out? - CORRECT ANSWER - Before translation
Where does transcription occur in the cell? - CORRECT ANSWER - Nucleus
What does RNA polymerase bind to in order to add complimentary bases and form
phosphodiester bonds between adjacent ribose sugars? - CORRECT ANSWER -
Transcription factors
RNA polymerase binds to transcription factors in order to _________ and _________ between
adjacent ribose sugars - CORRECT ANSWER - 1. add complimentary bases
2. form phosphodiester bonds
The interaction between base pairs that holds the two strands of DNA together is a ____ bond -
CORRECT ANSWER - Hydrogen
Water molecules are attracted to each other and form ________ bonds. - CORRECT
ANSWER - Hydrogen
, Sodium (Na+) will be attracted to what portion of a water molecule? - CORRECT
ANSWER - Oxygen
A bond in which electrons are shared between atoms is a _______ bond. - CORRECT
ANSWER - Covalent
Which of the following is NOT true about hydrophilic molecules
a. The diffuse easily in water
b. They have equal sharing of electrons across all the atoms in the molecule
c. They interact with the dipole moment in water - CORRECT ANSWER - b. They have
equal sharing of electrons across all the atoms in the molecule
__________ pressure is the driving force of water through aquaporins - CORRECT
ANSWER - Osmotic
True or False: Hydrostatic pressure is the driving force of water through aquaporins - CORRECT
ANSWER - False; Osmotic
True or False: Triglycerides are composed of 1 long chain fatty acid and three glycerols -
CORRECT ANSWER - False; 3 fatty acids and one glycerol backbone
In triglycerides, a fatty acid is joined to glycerol by a ________ bond
a. Hydrogen
b. Ionic
c. Covalent - CORRECT ANSWER - c. Covalent
_______ 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. - CORRECT ANSWER - Osmosis
Exam Questions and CORRECT Answers
Codons are on what type of RNA? What does they correspond to? - CORRECT
ANSWER - mRNA
amino acids, start, or stop signals during translation
What is a codon? - CORRECT ANSWER - A three amino acid sequence, or triplet, on the
mRNA
What is a reading frame? - CORRECT ANSWER - A way of organizing the sequence of
nucleotides in a nucleic acid (DNA or RNA) molecule into sets of consecutive, non-overlapping
triplets.
What side are amino acids added to on the amino acid chain? - CORRECT ANSWER - C-
terminus
What is a translocon? - CORRECT ANSWER - A protein located in the membrane of the
ER
When do SRPs bind? - CORRECT ANSWER - When amino acids contain 14-17
consecutive, hydrophobic amino acids
True or False: The TATA box is a sequence in DNA that provides a site for transcription factors
to bind to. - CORRECT ANSWER - True
True or False: The TATA box is also known as a promoter - CORRECT ANSWER - True
True or False: The TATA box is a sequence in RNA that signals that a protein should be
synthesized on the rough ER. - CORRECT ANSWER - False
,True or False: The TATA box is a sequence in RNA that signals the formation of ribosomal
subunits. - CORRECT ANSWER - False
True or False: The TATA box is a sequence in DNA that provides a site for helicase to unwind
DNA. - CORRECT ANSWER - False
In eukaryotes, what happens after RNA is transcribed from DNA? - CORRECT
ANSWER - The RNA is modified to cut out introns before being translated
What part is cut out before being translated? - CORRECT ANSWER - Introns
When are introns cut out? - CORRECT ANSWER - Before translation
Where does transcription occur in the cell? - CORRECT ANSWER - Nucleus
What does RNA polymerase bind to in order to add complimentary bases and form
phosphodiester bonds between adjacent ribose sugars? - CORRECT ANSWER -
Transcription factors
RNA polymerase binds to transcription factors in order to _________ and _________ between
adjacent ribose sugars - CORRECT ANSWER - 1. add complimentary bases
2. form phosphodiester bonds
The interaction between base pairs that holds the two strands of DNA together is a ____ bond -
CORRECT ANSWER - Hydrogen
Water molecules are attracted to each other and form ________ bonds. - CORRECT
ANSWER - Hydrogen
, Sodium (Na+) will be attracted to what portion of a water molecule? - CORRECT
ANSWER - Oxygen
A bond in which electrons are shared between atoms is a _______ bond. - CORRECT
ANSWER - Covalent
Which of the following is NOT true about hydrophilic molecules
a. The diffuse easily in water
b. They have equal sharing of electrons across all the atoms in the molecule
c. They interact with the dipole moment in water - CORRECT ANSWER - b. They have
equal sharing of electrons across all the atoms in the molecule
__________ pressure is the driving force of water through aquaporins - CORRECT
ANSWER - Osmotic
True or False: Hydrostatic pressure is the driving force of water through aquaporins - CORRECT
ANSWER - False; Osmotic
True or False: Triglycerides are composed of 1 long chain fatty acid and three glycerols -
CORRECT ANSWER - False; 3 fatty acids and one glycerol backbone
In triglycerides, a fatty acid is joined to glycerol by a ________ bond
a. Hydrogen
b. Ionic
c. Covalent - CORRECT ANSWER - c. Covalent
_______ 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. - CORRECT ANSWER - Osmosis
