Multiple choice

Which of the following statements is/are correct?

  1. Endogenous antigens are present on the cell surface along with MHC-I.
  2. The RNA primer synthesised during the replication process in bacteria is removed by DNA polymerase II.
  3. Type III restriction endonucleases cut DNA at defined positions close to or within their recognition sequences.

  1. Only 1

  2. Only 2

  3. Only 3

  4. 1 and 2

  5. 2 and 3
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

This option is correct because type III restriction endonucleases cut DNA outside of their recognition sequences and require two such sequences in opposite orientations within the same DNA molecule to accomplish cleavage.

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