CELL STRUCTURES AND FUNCTION
CELL CYCLE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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binds nucleotides together and corrects base pair errors
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transmits messages that are translated into proteins
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attracts amino acids to the ribosomes for assembly
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recognizes and points out new origins of replication
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Detailed explanation-1: -DNA polymerase can make mistakes while adding nucleotides. It edits the DNA by proofreading every newly added base. Incorrect bases are removed and replaced by the correct base, and then polymerization continues (Figure 9.13 a).
Detailed explanation-2: -DNA polymerase is responsible for the process of DNA replication, during which a double-stranded DNA molecule is copied into two identical DNA molecules. Scientists have taken advantage of the power of DNA polymerase molecules to copy DNA molecules in test tubes via polymerase chain reaction, also known as PCR.
Detailed explanation-3: -As the new nucleotides line up opposite each parent strand by hydrogen bonding, enzymes called DNA polymerases join the nucleotides by way of phosphodiester bonds.
Detailed explanation-4: -Correct answer: DNA polymerase I has the ability to remove mismatched nucleotides from the new strand and correct them. As a result, DNA replication is very accurate, because DNA polymerase has a proofreading mechanism.
Detailed explanation-5: -During DNA synthesis, most DNA polymerases “check their work, ” fixing the majority of mispaired bases in a process called proofreading. Immediately after DNA synthesis, any remaining mispaired bases can be detected and replaced in a process called mismatch repair.