Question

Choose the incorrect statement w.r.t. nucleases.

• A. Exonucleases and endonucleases are two kinds of nucleases
• B. Exonucleases remove nucleotides from the ends of the DNA
• C. Restriction endonucleases make cuts at random position within the DNA
• D. Each restriction endonuclease functions by inspecting the length of a DNA sequence

Answer 1

The correct option is C Restriction endonucleases make cuts at random position within the DNA

Restriction endonucleases make cuts at specific positions within the DNA. They recognize a specific sequences of DNA called palindrome. Palindrome are group of letters that form the same words when read both forward and backward. Thus, the palindrome in DNA is a sequence of base pairs that reads same on the two strands when orientation of reading is kept the same.