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JKCET Central Dogma — practice questions

Explore 2 free Central Dogma questions in JKCET Biology. Open each question or exercise to read its content, reference answers and available explanation.

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Central Dogma questions and exercises with answers

Showing questions 1–2 of 2.

**Central dogma** of molecular biology (Crick, 1958) states the flow of information as:Read the answer and worked solution →**Reverse transcription** (RNA → DNA) is a hallmark of:Read the answer and worked solution →

Worked practice questions

**Central dogma** of molecular biology (Crick, 1958) states the flow of information as:

  1. Protein → RNA → DNA
  2. DNA → RNA → Protein
  3. RNA → DNA → Protein
  4. DNA → Protein → RNA
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Correct answer: B. DNA → RNA → Protein

DNA → (transcription) → RNA → (translation) → Protein. (Retroviruses extend this with reverse transcription RNA → DNA, discovered by Temin and Baltimore.)

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**Reverse transcription** (RNA → DNA) is a hallmark of:

  1. Bacteria
  2. Retroviruses (e.g. HIV)
  3. Eukaryotic somatic cells
  4. Bacteriophages
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Correct answer: B. Retroviruses (e.g. HIV)

Retroviruses (HIV, etc.) carry RNA genomes and use reverse transcriptase (RNA-dependent DNA polymerase) to synthesise DNA from RNA — discovered by Temin and Baltimore (1970), modifying the central dogma.

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