DNA Structure & RNA Function—NEET Biology
📚 Practice ConceptDifferentiate between the following: (a) Repetitive DNA and Satellite DNA (b) mRNA and tRNA (c) Template strand and Coding strand
Which of the following statements regarding Variable Number of Tandem Repeats (VNTRs) and their application in DNA fingerprinting are correct? S1: VNTRs are non-coding, highly polymorphic repetitive DNA sequences that constitute the fundamental basis of DNA fingerprinting. S2: The copy number of VNTRs is consistent across all chromosomes within an individual, leading to a unique pattern between individuals. S3: DNA fingerprinting employing VNTRs can typically distinguish between monozygotic twins due to unique individual-specific variations. S4: Polymorphism in VNTRs refers to variations in the length of the tandem repeat units, which directly results in differing band sizes during autoradiography. S5: VNTRs are a class of micro-satellites and form major peaks distinct from bulk genomic DNA during density gradient centrifugation.
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