Prepare for NEET Biology Molecular Basis of Inheritance (DNA Finger Printing) with MCQs & PYQs on NEET.GUIDE. Access free practice, previous year questions, and expert solutions to understand VNTR analysis and forensic applications.
NEET Questions / Botany / Molecular Basis of Inheritance / Dna Finger Printing
In DNA fingerprinting, probes are used to:
Cut DNA at specific sites
Amplify the entire DNA sample
Separate DNA fragments by size
Hybridize with specific VNTR sequences
In DNA fingerprinting, the use of multiple, highly polymorphic loci is crucial for accurate identification. If a single locus has a probability of 0.1 of matching randomly between two unrelated individuals, what is the approximate probability of a match at 5 independent loci?
0.00001
0.0001
0.001
0.1
A student performs gel electrophoresis and observes distinct bands under UV light after staining. If the student had forgotten to add ethidium bromide, what would they have observed under UV light?
Faint bands
Blurry bands
Bands of a different color
No visible bands
In the context of forensic science, DNA fingerprinting utilizes variations in:
Telomeres
Centromeres
VNTRs
Histones
A forensic scientist is comparing DNA samples from a crime scene. The analysis focuses on specific repetitive sequences that vary greatly between individuals. These sequences are known as:
VNTRs
SNPs
Restriction sites
Coding sequences
After performing gel electrophoresis to separate DNA fragments, a researcher uses a UV transilluminator. What is the MOST likely reason for this step?
To visualize the DNA fragments stained with a fluorescent dye
To fix the DNA fragments in the gel
To further separate the DNA fragments
To purify the DNA fragments
A researcher is analyzing DNA fragments using gel electrophoresis. The gel is submerged in a buffer solution and a current is applied. After the separation, the researcher adds a solution to the gel and views it under UV light. What is the purpose of the added solution?
To provide conductivity to the gel
To denature the DNA fragments
To stain the DNA fragments for visualization
To apply an electric current to the gel
Variations in DNA sequences, known as polymorphisms, are the foundation of:
Paternity testing
Forensic science applications
Genetic disease diagnosis
All of the above
In a criminal investigation, DNA samples from a crime scene and a suspect are compared. This comparison relies on the principle of:
DNA replication
DNA transcription
DNA polymorphism
DNA repair
