Errors sometimes occur when copies of DNA are made during DNA replication these errors are called mutations

true

or

false

This is true, errors in DNA replication are indeed called mutations.

Errors do sometimes occurs mainly at the time of DNA replication. Mutations refers to the changes in the DNA sequence made at the time of DNA replication, however, the DNA replication procedure possesses characteristics that minimize mutations.

The three small scale mutations, which can take place at the time of DNA replication are nucleotide substiution, inversion and translocation. Hence, the given statement is true.