Please answer all the questions thank you A heritable change

A heritable change to the DNA sequence of a cell is called a______ 4.________and_____________interactions stabilize the three dimensional structure of a protein. Substituting a thymine with cytosine is an example of a transition. Restriction endonucleases are one mechanism used to ensure the accuracy of the genetic information.

Solution

1.Proofreading is a repair mechanism that helps to ensure faithful DNA replication in living cells. It is a function of the enzyme DNA polymerase, which catalyses the replication process. This enzyme identifies and excises mismatched bases at the end of the growing strand, leaving the end free to accept the correct nucleotide instead, thereby restoring the correct complementary base sequence.

2.Ames test is a test to determine the mutagenic activity of chemicals by observing whether they cause mutations in sample bacteria.

3.Mutation

4.Hydrophilic and hydrophobic

5.True(In genetics, a transition is a point mutation that changes a purine nucleotide to another purine (A G) or a pyrimidine nucleotide to another pyrimidine (C T).)

6.False( restriction enzyme or restriction endonuclease is an enzyme that cuts DNA at or near specific recognition nucleotide sequences known as restriction sites.)