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Transposable Elements Structure Quiz

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Questions and Answers

What is a key characteristic of prokaryotic DNA?

Linear shape

No introns (correct)

Located within a nucleus

Contains introns

Contains a large amount of repetitive DNA

Where is prokaryotic DNA typically located in the cell?

Within mitochondria

Within a nucleus

Freely in the cytoplasm (correct)

Attached to histone proteins

In the nucleus

Which statement is true regarding the number of DNA copies in prokaryotes?

Single copy (haploid) (correct)

Two copies (diploid)

Multiple copies (polyploid)

No copies (aploid)

Triple copies (triploid)

Which element is present in prokaryotic DNA but absent in eukaryotic DNA?

Plasmids Signup and view all the answers

What distinguishes prokaryotic DNA from eukaryotic DNA in terms of repetitive DNA and introns?

Contains little repetitive DNA and no introns Signup and view all the answers

What is the main difference between conjugative and non-conjugative plasmids?

Conjugative plasmids can be mobilized, while non-conjugative plasmids cannot be mobilized Signup and view all the answers

What is the defining characteristic of a shuttle vector?

Shuttle vectors can propagate in two different host species Signup and view all the answers

In the context of plasmids, what is the role of transposons?

Transposons are capable of moving within DNA to different locations Signup and view all the answers

What distinguishes natural plasmids from artificial plasmids?

Natural plasmids are designed artificially Signup and view all the answers

Which characteristic represents stringent plasmids?

Plasmids that cannot be maintained in the same cell Signup and view all the answers

What is the primary function of plasmids in molecular biology?

To act as vectors for gene therapy and DNA vaccines Signup and view all the answers

What is the function of Insertion sequences (IS) in transposable elements?

Encode only proteins needed for its own transposition Signup and view all the answers

Which type of transposable element contains two IS at both ends and a central piece of DNA encoding for antibiotic resistance or virulence factors?

Composite transposons (Tn) Signup and view all the answers

What do Non-composite transposons lack at their ends?

Insertion sequences (IS) Signup and view all the answers

Which of the following best describes a shuttle vector plasmid?

Circular extrachromosomal DNA capable of moving between prokaryotic and eukaryotic cells Signup and view all the answers

What is the primary difference between prokaryotic and eukaryotic DNA replication?

Prokaryotic DNA replication occurs in the cytoplasm, while eukaryotic DNA replication occurs in the nucleus Signup and view all the answers

Why did the 9-year-old girl not respond to ampicillin treatment despite having previously improved with it?

The bacteria developed resistance due to the presence of Tn3 transposon Signup and view all the answers