HEREDITY
MUTATIONS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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True
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False
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Detailed explanation-1: -DNA polymerases are the enzymes that build DNA in cells. During DNA replication (copying), most DNA polymerases can “check their work” with each base that they add. This process is called proofreading.
Detailed explanation-2: -The correct answer is (c) Most mistakes in DNA replication are not corrected and result in mutations. In fact, most mistakes in DNA replication are corrected and do not result in mutations.
Detailed explanation-3: -The only false statement is that DNA replication of the lagging strand is continuous. The leading strand features continuous replication while the lagging stand is initially made up of discontinuous Okazaki fragments, which are sealed later by ligase.
Detailed explanation-4: -Hence, DNA is not always perfectly copied during DNA replication.