BIO 370 Exam 2 Cell and Molech
questions well answered
1. Ribozymes are known to be involved in _______.
(a) synthesis of polysaccharide
(b) transcription
(c) RNA splicing
(d) protein degradation - correct answer ✔✔ (c) RNA splicing
2. Which of the following statements about transcriptional regulators is false?
(a) Transcriptional regulators usually interact with the sugar-phosphate backbone on the outside
of the double helix to determine where to bind on the DNA helix.
(b) Transcriptional regulators usually interact with the major groove of the DNA helix and make
specific contacts with the bases. - correct answer ✔✔ (a) Transcriptional regulators usually
interact with the sugar-phosphate backbone on the outside of the double helix to determine
where to bind on the DNA helix.
3. Operons ___________________________.
(a) are commonly found in eukaryotic cells
(b) contain a cluster of genes transcribed as a single mRNA
(c) can only be regulated by gene activator proteins - correct answer ✔✔ (b) contain a cluster of
genes transcribed as a single mRNA
, 4. The tryptophan operator ___________________________.
(a) binds to the tryptophan repressor when the repressor is bound to tryptophan
(b)is important for the production of the tryptophan repressor - correct answer ✔✔ (a) binds to
the tryptophan repressor when the repressor is bound to tryptophan
5. Which of the following is NOT a component of the nucleosome?
(a) histone H2a
(b) histone H2b
(c) histone H3
(d) histone H1 - correct answer ✔✔ (d) histone H1
6. Which of the following statements about riboswitches is false?
(a) Riboswitches can block the production of mRNAs.
(b) Riboswitches can control the translation of mRNAs.
(c) Riboswitches are made from rRNAs.
(d) Riboswitches can bind metabolites. - correct answer ✔✔ (c) Riboswitches are made from
rRNAs.
7. MicroRNAs (miRNAs) ____________________.
(a) are produced from a precursor miRNA transcript
(b) control gene expression by base-pairing with DNA sequences - correct answer ✔✔ (a) are
produced from a precursor miRNA transcript
questions well answered
1. Ribozymes are known to be involved in _______.
(a) synthesis of polysaccharide
(b) transcription
(c) RNA splicing
(d) protein degradation - correct answer ✔✔ (c) RNA splicing
2. Which of the following statements about transcriptional regulators is false?
(a) Transcriptional regulators usually interact with the sugar-phosphate backbone on the outside
of the double helix to determine where to bind on the DNA helix.
(b) Transcriptional regulators usually interact with the major groove of the DNA helix and make
specific contacts with the bases. - correct answer ✔✔ (a) Transcriptional regulators usually
interact with the sugar-phosphate backbone on the outside of the double helix to determine
where to bind on the DNA helix.
3. Operons ___________________________.
(a) are commonly found in eukaryotic cells
(b) contain a cluster of genes transcribed as a single mRNA
(c) can only be regulated by gene activator proteins - correct answer ✔✔ (b) contain a cluster of
genes transcribed as a single mRNA
, 4. The tryptophan operator ___________________________.
(a) binds to the tryptophan repressor when the repressor is bound to tryptophan
(b)is important for the production of the tryptophan repressor - correct answer ✔✔ (a) binds to
the tryptophan repressor when the repressor is bound to tryptophan
5. Which of the following is NOT a component of the nucleosome?
(a) histone H2a
(b) histone H2b
(c) histone H3
(d) histone H1 - correct answer ✔✔ (d) histone H1
6. Which of the following statements about riboswitches is false?
(a) Riboswitches can block the production of mRNAs.
(b) Riboswitches can control the translation of mRNAs.
(c) Riboswitches are made from rRNAs.
(d) Riboswitches can bind metabolites. - correct answer ✔✔ (c) Riboswitches are made from
rRNAs.
7. MicroRNAs (miRNAs) ____________________.
(a) are produced from a precursor miRNA transcript
(b) control gene expression by base-pairing with DNA sequences - correct answer ✔✔ (a) are
produced from a precursor miRNA transcript
