Tag: molecular biology

Questions Related to molecular biology

A bead on a string like chromatin with 200 beads or nucleosomes containing ..bp of DNA

bio-chemistry nucleic acids central dogma transcription and gene expression molecular biology

  1. 80,000

  2. 40,000

  3. 20,000

  4. 10,000

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Correct Option: B

DNA can be formed over RNA through

bio-chemistry nucleic acids central dogma transcription and gene expression molecular biology

  1. Ligase

  2. Gyrase

  3. Helicase

  4. Reverse transcriptase

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Correct Option: D

Teminism is

bio-chemistry nucleic acids central dogma transcription and gene expression molecular biology

  1. Reverse transcription

  2. RNA replication

  3. DNA replication

  4. None of the above

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Correct Option: A

Which one is RNA dependent DNA polymerase

bio-chemistry nucleic acids central dogma transcription and gene expression molecular biology

  1. RNA polymerase I

  2. Tag polymerase

  3. DNA polymerase

  4. Reverse transcriptase

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Correct Option: D

cDNA is copied from mRNA molecule with the help of

bio-chemistry nucleic acids central dogma transcription and gene expression molecular biology

  1. Restriction enzyme

  2. Reverse transcriptase

  3. DNA polymerase

  4. Adenosine deaminase

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Correct Option: B

In a 3.2K bp long piece of DNA, 820 adenine bases were found. What would be the number of cytosine bases

bio-chemistry nucleic acids central dogma transcription and gene expression molecular biology

  1. 1480

  2. 740

  3. 560

  4. 780

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Correct Option: D

Teminious central dogma of protein synthesis is

bio-chemistry nucleic acids central dogma transcription and gene expression molecular biology

  1. DNA DNA mRNA protein

  2. mRNA gRNA DNA Protein

  3. gRNA DNA mRNA Protein

  4. DNA gRNA mRNA Protein

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Correct Option: C

Central dogma of molecular biology was modified with the discovery of

bio-chemistry nucleic acids central dogma transcription and gene expression molecular biology

  1. Ligase

  2. RNA polymerase

  3. DNA polymerase

  4. Reverse transcriptase

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Correct Option: D

Which one is a termination codon?

bio-chemistry nucleic acids central dogma transcription and gene expression molecular biology

  1. UGU

  2. AAA

  3. UAG

  4. UUC

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Correct Option: A

Enzyme responsible for replication of HIV in macrophages is 

bio-chemistry nucleic acids central dogma transcription and gene expression molecular biology

  1. RNA polymerase

  2. DNA ligase

  3. DNA polymerase

  4. Reverse transcriptase

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Correct Option: D
Explanation:

Once inside a CD$ _4$ cell ( helper T cell ), HIV releases and uses reverse transcriptase  to convert its genetic material—HIV RNA—into HIV DNA. The conversion of HIV RNA to HIV DNA allows HIV to enter the CD$ _4$ cell nucleus and combine with the cell’s genetic material—cell DNA.

So, the correct answer is 'Reverse transcriptase'