Table of contents

1. Matter and Measurements4h 31m
2. Atoms and the Periodic Table5h 23m
3. Ionic Compounds2h 18m
4. Molecular Compounds2h 18m
5. Classification & Balancing of Chemical Reactions3h 17m
6. Chemical Reactions & Quantities2h 27m
7. Energy, Rate and Equilibrium3h 46m
8. Gases, Liquids and Solids3h 25m
9. Solutions4h 10m
10. Acids and Bases3h 29m
11. Nuclear Chemistry56m
BONUS: Lab Techniques and Procedures1h 38m
BONUS: Mathematical Operations and Functions47m
12. Introduction to Organic Chemistry1h 34m
13. Alkenes, Alkynes, and Aromatic Compounds2h 12m
14. Compounds with Oxygen or Sulfur1h 6m
15. Aldehydes and Ketones1h 1m
16. Carboxylic Acids and Their Derivatives1h 11m
17. Amines39m
18. Amino Acids and Proteins1h 51m
19. Enzymes1h 37m
20. Carbohydrates1h 41m
21. The Generation of Biochemical Energy2h 8m
22. Carbohydrate Metabolism2h 22m
23. Lipids2h 26m
24. Lipid Metabolism1h 45m
25. Protein and Amino Acid Metabolism1h 37m
26. Nucleic Acids and Protein Synthesis2h 54m

26. Nucleic Acids and Protein Synthesis

Steps of DNA Replication

GOB Chemistry

26. Nucleic Acids and Protein Synthesis

Steps of DNA Replication

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1:34 minutes

Problem 32

Textbook Question

How many daughter strands are formed during the replication of DNA?

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Understand that DNA replication is a biological process where a DNA molecule is copied to produce two identical DNA molecules. This process is essential for cell division.

Recall that DNA replication is semi-conservative, meaning each of the two original strands of the DNA molecule serves as a template for the formation of a new complementary strand.

During replication, the enzyme DNA polymerase synthesizes a new strand by matching complementary nucleotides (A pairs with T, and G pairs with C) to the template strand.

As a result of this process, two DNA molecules are formed, each consisting of one original (parent) strand and one newly synthesized (daughter) strand.

Therefore, during DNA replication, two daughter strands are formed, one for each of the original template strands.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

DNA Replication

DNA replication is the biological process through which a cell duplicates its DNA, resulting in two identical copies. This process is essential for cell division and occurs during the S phase of the cell cycle. It involves unwinding the double helix and synthesizing new strands complementary to each original strand.

Leading and Lagging Strands

During DNA replication, two types of daughter strands are formed: the leading strand and the lagging strand. The leading strand is synthesized continuously in the direction of the replication fork, while the lagging strand is synthesized in short segments, known as Okazaki fragments, in the opposite direction. This distinction is crucial for understanding how DNA is replicated efficiently.

Semi-Conservative Replication

DNA replication is described as semi-conservative because each new DNA molecule consists of one original (parental) strand and one newly synthesized (daughter) strand. This mechanism ensures genetic fidelity, as the original strands serve as templates for the formation of the new strands, reducing the likelihood of errors during replication.

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Related Practice

Multiple Choice

Below is a close-up of the portion of a DNA replication bubble.

Helicase is shown as a yellow triangle currently moving from left to right. Based on what you know about the creation of new DNA during replication, which is the lagging strand and why?

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Textbook Question

Suppose that 22% of the nucleotides of a DNA molecule are deoxyadenosine and during replication the relative amounts of available deoxynucleoside triphosphates are 22% dATP, 22% dCTP, 28% dGTP, and 28% dTTP. What deoxynucleoside triphosphate is limiting to the replication? Explain.

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Textbook Question

What is the function of the enzyme helicase in DNA replication?

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Textbook Question

What process ensures that the replication of DNA produces identical copies?

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Textbook Question

Copy the following simplified drawing of a DNA replication fork: