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STD 12 - 9. biotechnology principlas and process — BIOLOGY STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceBIOLOGYSTD 12 - 9. biotechnology principlas and process1 Mark
MCQ
Which one of the following represents a palindromic sequence in $DNA$ ?
  • ✓
    $5' - GAATTC - 3'$
    $3' - CTTAAG - 5'$
  • B
    $5' - CCAATG - 3'$
    $3' - GAATCC - 5'$
  • C
    $5' - CATTAG - 3'$
    $3' - GATAAC - 5'$
  • D
    $5' - GATACC - 3'$
    $3' - CCTAAG - 5'$
✓

Answer

Correct option: A.
$5' - GAATTC - 3'$
$3' - CTTAAG - 5'$
a
A palindromic sequence is a nucleic acid sequence ( $DNA$ or $RNA$ ) that is the same whether read $5'$ (five-prime) to $3'$ (three prime) on one strand or $5'$ to $3'$ on the complementary strand with which it forms a double helix.

$5 - GAATTC - 3$

$3 - CTTAAG - 5$

It is a palindromic sequence of $DNA$ cut by restriction enzyme $EcoRI$.

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