Question

Which of the following statements given below are correct?
(A) BamHI and EcoRI have five and six base pair long recognition sequences, respectively.
(B) Roman number in the restriction enzyme name indicates the order in which it was isolated from the bacteria.
(C) Restriction endonuclease function by inspecting the length of a DNA molecule for recognition sequences.
(D) The palindrome in DNA reads the same on the two strands when orientation is kept the same.

Choose the correct option.

• A. A, B, C
  
• B. B and C only
  
• C. B, C, D
  
• D. All of the above
  

Answer 1

The correct option is C B, C, D


Restriction endonucleases recognize specific nucleotide sequences by inspecting the length of a DNA molecule, often a palindrome known as restriction site, and cleave the DNA at a specific nucleotide within the restriction site.

The Roman number at the end represents the order in which that particular restriction endonuclease was isolated from that strain of bacteria.

BamHI and EcoRI have six base pair long recognition sequences.

The palindrome in DNA reads the same on the two strands when orientation is kept the same. For example:
The palindromic recognition sequence of EcoRI

The palindromic recognition sequence of BamHI