Table of contents

1. Introduction to Microbiology3h 22m
2. Disproving Spontaneous Generation1h 18m
3. Chemical Principles of Microbiology3h 38m
4. Water1h 28m
5. Molecules of Microbiology2h 23m
6. Cell Membrane & Transport3h 28m
7. Prokaryotic Cell Structures & Functions5h 52m
8. Eukaryotic Cell Structures & Functions2h 18m
9. Microscopes2h 46m
10. Dynamics of Microbial Growth4h 36m
11. Controlling Microbial Growth4h 10m
12. Microbial Metabolism5h 16m
13. Photosynthesis2h 31m
14. DNA Replication2h 25m
15. Central Dogma & Gene Regulation7h 14m
16. Microbial Genetics4h 44m
17. Biotechnology3h 0m
18. Viruses, Viroids, & Prions4h 56m
19. Innate Immunity7h 15m
20. Adaptive Immunity7h 14m
21. Principles of Disease6h 57m

14. DNA Replication

DNA Polymerases

Microbiology

14. DNA Replication

DNA Polymerases

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Multiple Choice

Why is DNA methylation important in DNA replication?

Methyl groups bind to and stop the replication of genes that the cell does not need.

Methyl groups bind to and increase the replication of genes that the cell needs.

Methyl groups bind to the old DNA strands so DNA polymerase can recognize the new DNA strands.

Methyl groups bind to the new DNA strands so DNA polymerase can recognize the old DNA strands.

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Verified step by step guidance

Understand the role of DNA methylation: DNA methylation involves the addition of a methyl group to the DNA molecule, typically at cytosine bases. This process is crucial for regulating gene expression and maintaining genomic stability.

Recognize the significance of methylation in DNA replication: During DNA replication, methylation helps the cell distinguish between the old (parental) and new (daughter) DNA strands.

Identify the correct mechanism: Methyl groups are added to the old DNA strands. This methylation pattern serves as a marker for the DNA repair machinery and DNA polymerase to recognize the old strands from the newly synthesized ones.

Consider the implications of methylation: By marking the old strands, methylation ensures that any errors introduced during replication can be corrected by using the old strand as a template, thus maintaining the integrity of the genetic information.

Conclude with the correct answer: The correct statement is that methyl groups bind to the old DNA strands so DNA polymerase can recognize the new DNA strands, facilitating accurate DNA replication and repair.