CUET · BIOLOGY · PYQ PAPER 2023
Which of the following is NOT a means of transmission of Sexually Transmitted Infections (STIs)?
- A Sharing of injection needles
- B Transfusion of blood
- C Sharing of surgical instruments
- D Shaking hand with infected person
Answer & Solution
Correct Answer
(D) Shaking hand with infected person
Step-by-step Solution
Detailed explanation
Shaking hand with infected person
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DNA Fingerprinting
Polymorphism in DNA sequence is the basis of genetic mapping of the human genome as well as of DNA fingerprinting. DNA fingerprinting involves identification of differences in some specific regions in the DNA sequence called repetitive DNA. It works on the principle of polymorphisms in DNA sequences. The repetitive DNA are separated from bulk genomic DNA. The bulk DNA forms a major peak and the other small peaks are referred to as satellite DNA. These repetitive/satellite DNA sequences show a high degree of polymorphisms and form the basis of DNA fingerprinting.
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