Where is Telomerase RNA located and what is its function?

In the nucleoprotein complex, maintaining telomere length

In the ribosome, forming subunits

In the cytoplasm, carrying amino acids

In the nucleus, encoding polypeptides

What is the role of constitutive genes?

Only active during cell division

What is the role of RNA polymerase during transcription?

It synthesizes RNA from a DNA template.

It unwinds the DNA double helix.

It adds nucleotides to the 3' end of the DNA.

It terminates the transcription process.

What is the role of the σ factor in the initiation of transcription in bacteria?

It binds to the promoter and forms a closed promoter complex.

It separates the AT base-pairs of the -10 sequence.

It terminates the transcription process.

What happens after the AT base-pairs of the -10 sequence separate during transcription initiation?

The σ factor binds to the promoter.

The transcription process is terminated.

The RNA polymerase detaches from the DNA.

What occurs when the σ factor is released during transcription initiation?

Elongation begins with the RNA Pol core enzyme.

The RNA polymerase forms a closed complex.

The transcription process is terminated.

What is the role of RNA polymerase during the elongation phase of transcription in bacteria?

It unwinds DNA and uses the template strand to make the RNA transcript.

It synthesizes proteins directly from DNA.

It replicates the entire DNA strand.

It degrades the RNA transcript.

What happens to the DNA after RNA polymerase has passed during transcription?

DNA rewinds behind RNA polymerase.

DNA remains unwound permanently.

DNA forms a double helix with RNA.

What role does a promoter play in bacterial transcription?

It specifies the direction of transcription.

It terminates the transcription process.

It translates RNA into proteins.

In bacterial transcription, what can some promoters do with regard to adjacent genes along a chromosome?

Direct transcription in one direction or the opposite direction.

Terminate transcription immediately.

What is the role of the ρ protein in the rho-dependent termination mechanism of transcription in bacteria?

It binds to the rho utilization (rut) sequence and moves toward the 3' end of RNA.

What causes RNA polymerase to pause during rho-dependent termination?

The formation of a stem-loop due to inverted repeats.

The presence of a terminator protein.

The binding of a repressor protein.

How does the ρ protein facilitate the release of the RNA transcript in rho-dependent termination?

By its helicase activity, separating the RNA-DNA hybrid.

By binding to the promoter region.

What is the role of the rut sequence in mRNA during the Rho-dependent termination of transcription in bacteria?

It serves as the recognition site for Rho protein.

It initiates the transcription process.

It binds to the DNA polymerase.

It terminates the translation process.

What happens when the Rho protein binds to the rut sequence in mRNA?

It moves toward the 3' end of mRNA.

What is the final step in the Rho-dependent termination of transcription?

Rho protein releases mRNA and RNA polymerase from DNA.

mRNA is translated into protein.

Rho protein binds to the ribosome.

What happens to the A-U base pairs during the rho-independent termination mechanism?

They break, releasing the RNA transcript

They strengthen the RNA-DNA hybrid

They cause the RNA polymerase to bind more tightly

What is the role of the U-rich RNA sequence in the rho-independent termination mechanism?

It is unable to hold the RNA-DNA hybrid together, leading to termination

It strengthens the RNA-DNA hybrid

It causes the RNA polymerase to pause

It forms a double helix with the DNA

What is the role of TFIID in transcription?

Binds to the TATA box and promotes its binding

Phosphorylates the CTD of RNA polymerase II

What is the function of the mediator complex in transcription?

Mediates the effects of regulatory transcription factors

Phosphorylates RNA polymerase I

What is the first step in the initiation of transcription in eukaryotes?

TFIID binds to the TATA box and DPE.

RNA Pol II binds to the core promoter.

TFIIH acts as a helicase to form an open complex.

Bio 206 CH:12

12th Grade

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98 Qs

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Bio 206 CH:12

Quiz

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Science

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12th Grade

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Practice Problem

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NGSS

HS-LS1-1

Standards-aligned

Alex Ly

Used 5+ times

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98 questions

Show all answers

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Who formulated the central dogma of molecular genetics in 1958?

James Watson

Francis Crick

Rosalind Franklin

Gregor Mendel

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the role of transcription in molecular genetics?

Produces a DNA copy of a gene

Produces an RNA copy of a gene

Produces a polypeptide using mRNA

Stores information in units called genes

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What does messenger RNA (mRNA) do?

Stores information in units called genes

Becomes part of a functional protein

A temporary copy of a gene that contains information to make a polypeptide

Produces a polypeptide using mRNA

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the function of translation in the central dogma?

Produces a DNA copy of a gene

Produces an RNA copy of a gene

Produces a polypeptide using the information in mRNA

Stores information in units called genes

What is the primary function of Messenger RNA (mRNA)?

To carry amino acids to ribosomes

To encode the sequence of amino acids in a polypeptide

To form the large and small ribosomal subunits

To regulate mRNA stability and translation

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which type of RNA helps form the large and small ribosomal subunits?

Messenger RNA (mRNA)

Transfer RNA (tRNA)

Ribosomal RNA (rRNA)

MicroRNA (miRNA)

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the role of Transfer RNA (tRNA) in protein synthesis?

To encode the sequence of amino acids in a polypeptide

To carry amino acids to ribosomes and bind them to mRNA

To form the large and small ribosomal subunits

To regulate mRNA stability and translation

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Bio 206 CH:12

98 questions

Who formulated the central dogma of molecular genetics in 1958?

What is the role of transcription in molecular genetics?

What does messenger RNA (mRNA) do?

What is the function of translation in the central dogma?

What is the primary function of Messenger RNA (mRNA)?

Which type of RNA helps form the large and small ribosomal subunits?

What is the role of Transfer RNA (tRNA) in protein synthesis?

Which type of RNA is involved in regulating mRNA stability and translation?

Where is Telomerase RNA located and what is its function?

What does a gene code for?

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