Prepare for NEET Biology Molecular Basis of Inheritance with MCQs & PYQs on NEET.GUIDE. Access free practice, previous year questions, and expert explanations of DNA replication and genetics.
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
Why is the use of mitochondrial DNA (mtDNA) preferred over nuclear DNA in forensic analysis of highly degraded samples?
Longer sequence length
Greater polymorphism
Higher copy number per cell
Absence of introns
Which of the following techniques is NOT directly involved in generating a DNA fingerprint?
Restriction Fragment Length Polymorphism (RFLP) analysis
Southern blotting
Polymerase Chain Reaction (PCR) using specific primers
Polymerase Chain Reaction (PCR) using random primers
A child's DNA fingerprint shows a band that is not present in either parent's profile. What is the MOST likely explanation for this observation, assuming no technical errors?
Sample contamination
Technical error during PCR
Mutation in a germ cell of one parent
Incomplete digestion by restriction enzymes
Which of the following codons initiates protein synthesis in most organisms?
AUG
UAA
UGA
UAG
In the process of translation, which codon signals the ribosome to start assembling the polypeptide chain?
UAG
AUG
UGA
UAA
The codon AUG codes for which amino acid in eukaryotes at the start of translation?
Methionine
Tryptophan
Valine
Glycine
If the length of a DNA molecule is 1.1 meters, approximately how many base pairs does it contain?
3.2 x 106
3.2 x 109
1.1 x 109
0.34 x 109
