Human Genome Project and DNA Fingerprinting MCQ Quiz in తెలుగు - Objective Question with Answer for Human Genome Project and DNA Fingerprinting - ముఫ్త్ [PDF] డౌన్‌లోడ్ కరెన్

Correct Answer: Option 3

Concept:

• DNA is the genetic material found in many organisms including humans.
• A DNA sequence consists of genes that code for different proteins in an organism.
• A DNA molecule consists of both coding and non-coding sequences.
• Many times repetitive DNA sequences are found throughout the eukaryotic genome.
• Depending on the number of repetitive units, base composition, and length of the segment; satellite DNA is grouped into minisatellite and microsatellite. 
• Minisatellite and microsatellite repetitive sequences are found in a eukaryotic genome.

Explanation:

• MINISATELLITES:
  • These repetitive sequences of DNA occur throughout the eukaryotic genome.
  • It consists of tandemly repeated sequences.
  • The length of these repeats ranges from 10 – 60bp.
  • The number of such repeats in a genome range from 5 to 50 times.
  • These are non-coding sequences of DNA.
  • They form a large portion of a eukaryotic genome.
  • Since these sequences do not code for any proteins, any changes in their sequences do not have any biological effect.

• Option 1: 10-40 bp sized small sequences within the genes ​- INCORRECT
  • A minisatellite consists of 10-60 bp short repeat sequences.
• Option 2: Short coding repetitive region on the eukaryotic genome - INCORRECT
  • A minisatellite is a non-coding repetitive region on the eukaryotic genome.
• Option 3: Short non-coding repetitive sequence forming a large portion of eukaryotic genome ​- CORRECT
  • A minisatellite is a short non-coding repetitive sequence of DNA. It occurs throughout the eukaryotic genome.
• Option 4: Regions of coding strands of the DNA - INCORRECT
  • ​A coding strand is the strand of DNA that comprises of genetic code that is similar to the genetic code that is transcribed on a newly formed mRNA after transcription.
  • Minisatellite on the other hand comprises non-coding sequences.

So the correct answer is option 3.