QUESTION 24What is the name of chemical agents that alter specific bases within DNA after completed replication?O a. replicative inhibitorsO b. mutantsO C. mutagensd. oncogenesОе. ассерtorsQUESTION 25What is the first step of the reparation process?a. proofreadingO b. ligation of synthesized strandsO c. excision of wrong basesO d.cleavage of glycosidic bondse. DNA synthesis using DNA polymerase

“Since you have asked multiple questions, we will solve the first question for you. If you want any specific question to be solved, then please specify the question number or post only that question.”Mutagens are the chemical or physical agents that can cause alteration in the sequence of the DNA. One example is of radiations like X-rays, these can cause distortions in the genome. Another example is of ultraviolet radiation which can cause dimerization of the pyrimidines in the strand. Hence, the correct answer is option C. Incorrect option A: These inhibitors are effective during the process of DNA replication. They work to inhibit the synthesis of the DNA. They do not change the sequence of the DNA. Incorrect option B: Mutant is a gene or an animal showing the mutated expression of the gene. Mutant exhibits defective or altered gene sequence or genetic sequence. It is the result of a mutation that has already occurred. Incorrect option D: These are the genes whose defection causes cancer. These genes are a potential cause of cancer or tumour formation. Mutation in these often results in the unchecked cell division or alteration in the cell cycle checkpoints. Incorrect option E: An acceptor in a biochemical reaction can be a molecule or compound to receive a chemical group or ion or an electron. Acceptor does not alter the sequence of the DNA.