BS161 iclicker Exam 2024| Questions
solved 100% Correct/Verified Solutions
Which of the following are true about the structure of a double-stranded DNA
molecule
A. The nucleotides in a single strand of DNA are held together by hydrogen bonds
B. The nitrogenous bases in one strand are held to the nitrogenous base of
the other strand by phosphodiester bonds
C. In DNA, purine nucleotides (A & G) always form base pairs with purines,
and pyrimidine nucleotides (C & T) always form base pairs with pyrimidine
D. The diameter of a DNA molecule is the same along its entire length due to the
specific complementary base pairing of the DNA nucleotides - ANSWER D
What is required to produce RNA - ANSWER The positive transcription factor
must bind at the regulatory region and the RNA polymerase must bind at the
regulatory region
Put the following gene expression steps in order
A. RNA polymerase moves along the DNA and creates an RNA
B. RNA polymerase binds DNA and separates the strands
C. DNA helix reforms and RNA polymerase falls off the DNA
, D. Positive transcription factor binds to the regulatory region - ANSWER DBAC
How is genetic information transferred from DNA to RNA during transcription -
ANSWER Through formation of hydrogen bonds between ribonucleotides and
deoxyribonucleotides
How is genetic information in DNA maintained in the RNA - ANSWER Through
formation of phosphodiester bonds between ribonucleotides
Which of the following correctly describes translation termination
A. A tRNA charged with STOP binds to the mRNA and ribosome, which causes
the ribosome to release the polypeptide from the last tRNA and dissociate from
the mRNA
B. a release factor protein binds to the mRNA and ribosome, which causes the
ribosome to release the polypeptide from the last tRNA and dissociate from
the mRNA
C. a tRNA charged with a release factor protein binds to the stop codon,
which causes the ribosome to dissociate and release the polypeptide
D. RNA polymerase binds to the mRNA and ribosome, which causes the ribosome
to release the polypeptide from the mRNA - ANSWER B
Choose the reasoning that is relevant to the claim that an incorrectly charged
tRNA will alter the polypeptide sequence
A. The AT base pairs in the promoter facilitate RNA polymerase opening of the
DNA to expose single stranded DNA template
B. Release factor binds to the ribosome when a stop codon is in the A site
causing termination of translation
solved 100% Correct/Verified Solutions
Which of the following are true about the structure of a double-stranded DNA
molecule
A. The nucleotides in a single strand of DNA are held together by hydrogen bonds
B. The nitrogenous bases in one strand are held to the nitrogenous base of
the other strand by phosphodiester bonds
C. In DNA, purine nucleotides (A & G) always form base pairs with purines,
and pyrimidine nucleotides (C & T) always form base pairs with pyrimidine
D. The diameter of a DNA molecule is the same along its entire length due to the
specific complementary base pairing of the DNA nucleotides - ANSWER D
What is required to produce RNA - ANSWER The positive transcription factor
must bind at the regulatory region and the RNA polymerase must bind at the
regulatory region
Put the following gene expression steps in order
A. RNA polymerase moves along the DNA and creates an RNA
B. RNA polymerase binds DNA and separates the strands
C. DNA helix reforms and RNA polymerase falls off the DNA
, D. Positive transcription factor binds to the regulatory region - ANSWER DBAC
How is genetic information transferred from DNA to RNA during transcription -
ANSWER Through formation of hydrogen bonds between ribonucleotides and
deoxyribonucleotides
How is genetic information in DNA maintained in the RNA - ANSWER Through
formation of phosphodiester bonds between ribonucleotides
Which of the following correctly describes translation termination
A. A tRNA charged with STOP binds to the mRNA and ribosome, which causes
the ribosome to release the polypeptide from the last tRNA and dissociate from
the mRNA
B. a release factor protein binds to the mRNA and ribosome, which causes the
ribosome to release the polypeptide from the last tRNA and dissociate from
the mRNA
C. a tRNA charged with a release factor protein binds to the stop codon,
which causes the ribosome to dissociate and release the polypeptide
D. RNA polymerase binds to the mRNA and ribosome, which causes the ribosome
to release the polypeptide from the mRNA - ANSWER B
Choose the reasoning that is relevant to the claim that an incorrectly charged
tRNA will alter the polypeptide sequence
A. The AT base pairs in the promoter facilitate RNA polymerase opening of the
DNA to expose single stranded DNA template
B. Release factor binds to the ribosome when a stop codon is in the A site
causing termination of translation
