MHT CET 202622 AprilEvening Shift
- Exam
- MHT CET
- Year
- 2026
- Date
- 22 April
- Shift
- Evening Shift
- Subject
- Biology
- Chapter
- Molecular Basis of Inheritance
MHT CET 2026 · 22 April · Evening Shift · Biology · Molecular Basis of Inheritance
The DNA probe used in DNA fingerprinting consists of ____(A)____...
The DNA probe used in DNA fingerprinting consists of ____(A)____ and labeled with ____(B)____.
Choose the correct options for (A) and (B) respectively.
Choose the correct options for (A) and (B) respectively.
Options
- A(A) unknown sequence of double-stranded DNA & (B) nitrocellulose filter paper
- B(A) known sequence of double-stranded DNA & (B) variable sequences of light and heavy chain
- C(A) unknown sequence of single-stranded DNA & (B) sticky and blunt ends
- D(A) known sequence of single-stranded DNA & (B) radioactive isotopes
Correct answer
D. (A) known sequence of single-stranded DNA & (B) radioactive isotopes
Step-by-step solution
A DNA probe is a small, known sequence of single-stranded DNA or RNA that is complementary to the specific sequence of DNA being sought.
It is labeled with a radioactive isotope (or a fluorescent tag) so that it can be easily detected after it hybridizes with its complementary target sequence on the nitrocellulose membrane during DNA fingerprinting.
Therefore, (A) is a known sequence of single-stranded DNA and (B) is radioactive isotopes.
Answer: (A) known sequence of single-stranded DNA & (B) radioactive isotopes
It is labeled with a radioactive isotope (or a fluorescent tag) so that it can be easily detected after it hybridizes with its complementary target sequence on the nitrocellulose membrane during DNA fingerprinting.
Therefore, (A) is a known sequence of single-stranded DNA and (B) is radioactive isotopes.
Answer: (A) known sequence of single-stranded DNA & (B) radioactive isotopes