Molecular Biology CE I

A detailed illustration of DNA structure and replication process, showcasing the molecular interactions during the replication fork, with elements representing proteins and enzymes involved in molecular biology.

Molecular Biology CE I Quiz

Test your knowledge of molecular biology with our comprehensive quiz designed for students and enthusiasts alike. This quiz covers a wide range of topics including DNA replication, transcription, and repair mechanisms.

18 multiple choice questions
Score each question correctly for a better understanding
Ideal for students, educators, or anyone interested in molecular biology

18 Questions4 MinutesCreated by LearningGene42

Telomerase,a RNA-protein complex which completes the replication of telomeres during DNA synthesis, is a specialized

RNA dependent DNA polymerase

DNA dependent RNA polymerase

RNA dependent RNA polymerase

All of them

The combination of all the proteins that function at the replication fork is referred to as

Replicon

Replisome

Replica

Replicating unit

Select the statement which correctly describes the enzymatic acitivity of DNA pol I

The polymerase synthesize DNA in 3' to 5' direction

The RNA primer nucleotides are removed by the 5' to 3' exonuclease

The 3' to 5' exonuclease extends the 3' end of the parent strand nucleotides

The 3' to 5' exonuclease replaces the RNA primer with deoxynucleotides.

During DNA replication, events at the replication fork requires different types of enzymes having specialized function except

DNA polymerase III

DNA gyrase

DNA ligase

DNA glycosylase

Given below are four statements about eukaryotic DNA replication. Which one is true?

Both leading and lagging strands are synthesized by DNA polymerase Alpha.

Entire leading and lagging strands are synthesized by polymerase Epsilon and Delta

Primers for both the strands are synthesized by DNA polymerase Alpha followed by switching with polymerase Epsilon and Delta

Primers for both the strands are synthesized by DNA polymerase Alpha followed for switching with polymerase Gamma

Leaving group for the first reaction of DNA synthesis is_________

Inorganic phosphate

Pyrophosphate

Triphosphate

None of them

Predict the enzyme of Escherichia coli which is involved in branch migration during homologous recombination

Rec A

Rec BCD

Ruv B

Ruv C

If E.coli cells carry mutation in Ruv ABC gene, which of the function is going to hamper

Homologous strand exchange

Resolution of Holiday junction

Making of Holiday junction

None of them

Insertion sequences are not present in

IS elements

Composite transposons

Non composite transposons

None

Select what type of DNA modification enables the daughter strand to be recognized during mismatch repair?

Acetylation

Methylation

Demethylation

Deacetylation

In base excision repair, the enzyme that cleaves the b-N-glycosidic bond between a damaged base and the sugar component of the nucleotide is called _____?

DNA endonuclease

DNA glycosylase

DNA exonuclease

All of them

Predict the nature of Rho in a Rho-dependent termination?

A exonuclease protein

RNAse protein

A ligase protein

A helicase protein

Which subunit of E.coli RNA polymerase is responsible for correct gene expression?

Alpha

Beta

Gamma

Sigma

Which of the following enzyme doesnot require a primer?

RNA dependent DNA polymerase

DNA dependent DNA polymerase

DNA dependent RNA polymerase

Taq DNA polymerase

What is role of PCNA in eukaryotic replication?

To act as DNA polymerase processivity factor

Act as DNA helicase

To act as primase

None of above

Sequences which are recognised by transposes ezymes are known as

Direct Repeats

Inverted Terminal Repeats

Transposons

Any of them

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Molecular Biology CE I

Molecular Biology CE I Quiz

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