$E$. coli about to replicate was placed in a medium containing radioactive thynidine for five minutes. Then it was made to replicate in a normal medium. Which of the following observation will be correct?
- Both the strands of DNA will be radioactive
- One strand radioactive
- Each strand half radioactive
- None is ladioactive
The Correct Option is B
Solution and Explanation
Top Questions on DNA Replication
- In a chromosome, there is a specific DNA sequence, responsible for initiating replication. It is called as:
- NEET (UG) - 2024
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List I List II A Frederick Griffith I Genetic code B Francois Jacob & Jacque II Semi-conservative mode of DNA replication C Har Gobind Khoran III Transformation D Meselson & Stahl IV Lac operon
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List-1 (Scientists) List-II (Contribution) A Maxam-Gilbert I DNA polymerase isolation B Stanley Cohen II DNA sequencing C Kornberg III Genetic code D Har Gobind Khorana IV DNA cloning Choose the correct answer from the options given below
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- For DNA replication, which of the following statements are true?
A. Circular chromosome of E.coli replicates through multiple origin of replication.
B. In each linear chromosome of eukaryote, DNA replication begins when replication bubbles form at multiple sites along giant DNA molecule.
C. In each linear chromosome of eukaryote, DNA replication begins when replication bubbles form at single site along giant DNA molecule.
D. In circular chromosome of E.coli, one origin of replication is present.
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- DNA sequence that changes its location on the genome is termed as
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Questions Asked in AIIMS exam
Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R
Assertion (A) : 02 is liberated in the non-cyclic photophosphorylation.
Reason (R) : Liberation of oxygen is due to photolysis of water.
In the light of the above statements, choose the correct answer from the options given below
- AIIMS - 2019
- Photosynthesis in higher plants
- Match the following column I with column II.
- AIIMS - 2019
- cloning
Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R
Assertion (A) : The Cro-Magnon man was the direct ancestor of the living modern man.
Reason (R) : Cro-Magnon man had slightly prognathous face.
In the light of the above statements, choose the correct answer from the options given below
- AIIMS - 2019
- evolution
- Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R
Assertion: Orbit of a satellite is within the gravitational field of earth whereas escaping is beyond the gravitational field of earth.
Reason: Orbital velocity of a satellite is greater than its escape velocity.
In the light of the above statements, choose the correct answer from the options given below- AIIMS - 2019
- Gravitation
Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R
Assertion (A) : In eukaryotes, transcription occurs in nucleus.
Reason (R) : In bacteria, transcription and translation occurs in cytoplasm.
In the light of the above statements, choose the correct answer from the options given below
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- Transcription
Concepts Used:
DNA Replication
The process by which the genome’s DNA is copied in cells is called DNA Replication. It must first copy (or replicate) its entire genome before cell division so that each resulting daughter cell ends up with its own complete genome.
It is the natural cycle of creating two indistinguishable imitations of DNA from one unique DNA molecule. DNA replication happens to take all things together living creatures going about as the most core part for organic legacy. This is important for cell division during the development and fixation of harmed tissues, while it likewise guarantees that every one of the new cells gets its duplicate of the DNA. The phone has the unmistakable property of division, which makes replication of DNA fundamental.
The parental DNA stays together, and the recently shaped daughter strands are together in conservative replication. The semi-conservative strategy recommends that every one of the two parental DNA strands goes about as a format for new DNA to be integrated; after that each two-fold abandoned DNA incorporates one "old" strand (parental) and one "new" strand.