Cell cycle is also known as cell division. It is divided into interphase and mitotic phase. Interphase is divided into G1 phase, S phase, and G2 phase. Mitotic phase is divided into prophase, metaphase, anaphase, and telophase. This is followed by cytokinesis.

Question

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Answer 1

Question

Chapter 7, Problem 1SQ

Summary Introduction

Introduction: Cell cycle is also known as cell division. It is divided into interphase and mitotic phase. Interphase is divided into G1 phase, S phase, and G2 phase. Mitotic phase is divided into prophase, metaphase, anaphase, and telophase. This is followed by cytokinesis.

Expert Solution & Answer

Answer to Problem 1SQ

Correct answer: Option b. is given as “S phase”. Therefore, option b. is correct.

Explanation of Solution

Reasons for the correct statement:

S-phase is the replicative phase. In this phase DNA replication occurs. Therefore, the amount of genetic material becomes double.

Hence, option b. is correct.

Reasons for the incorrect statements:

Option a. is given as “G1 phase”. However, G1 phase is also known as gap 1 phase. This phase synthesizes the proteins and other factors required for the DNA replication.

Therefore, option a. is incorrect.

Option c. is given as “G2 phase”. However, G2 phase is also known as gap 2 phase. This phase occurs after S-phase.

So, option c. is incorrect.

Option d. is given as “division stage”. However, cell division stage is the mitotic phase. In this phase, DNA is already duplicated.

Therefore, option d. is incorrect.

Hence, options a., c, and d. are incorrect.

Conclusion

In the cell cycle, DNA is duplicated in the S phase.

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Answer 2

Question

Chapter 7, Problem 1SQ

Summary Introduction

Introduction: Cell cycle is also known as cell division. It is divided into interphase and mitotic phase. Interphase is divided into G1 phase, S phase, and G2 phase. Mitotic phase is divided into prophase, metaphase, anaphase, and telophase. This is followed by cytokinesis.

Expert Solution & Answer

Answer to Problem 1SQ

Correct answer: Option b. is given as “S phase”. Therefore, option b. is correct.

Explanation of Solution

Reasons for the correct statement:

S-phase is the replicative phase. In this phase DNA replication occurs. Therefore, the amount of genetic material becomes double.

Hence, option b. is correct.

Reasons for the incorrect statements:

Option a. is given as “G1 phase”. However, G1 phase is also known as gap 1 phase. This phase synthesizes the proteins and other factors required for the DNA replication.

Therefore, option a. is incorrect.

Option c. is given as “G2 phase”. However, G2 phase is also known as gap 2 phase. This phase occurs after S-phase.

So, option c. is incorrect.

Option d. is given as “division stage”. However, cell division stage is the mitotic phase. In this phase, DNA is already duplicated.

Therefore, option d. is incorrect.

Hence, options a., c, and d. are incorrect.

Conclusion

In the cell cycle, DNA is duplicated in the S phase.

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Answer 3

Question

Chapter 7, Problem 1SQ

Summary Introduction

Introduction: Cell cycle is also known as cell division. It is divided into interphase and mitotic phase. Interphase is divided into G1 phase, S phase, and G2 phase. Mitotic phase is divided into prophase, metaphase, anaphase, and telophase. This is followed by cytokinesis.

Expert Solution & Answer

Answer to Problem 1SQ

Correct answer: Option b. is given as “S phase”. Therefore, option b. is correct.

Explanation of Solution

Reasons for the correct statement:

S-phase is the replicative phase. In this phase DNA replication occurs. Therefore, the amount of genetic material becomes double.

Hence, option b. is correct.

Reasons for the incorrect statements:

Option a. is given as “G1 phase”. However, G1 phase is also known as gap 1 phase. This phase synthesizes the proteins and other factors required for the DNA replication.

Therefore, option a. is incorrect.

Option c. is given as “G2 phase”. However, G2 phase is also known as gap 2 phase. This phase occurs after S-phase.

So, option c. is incorrect.

Option d. is given as “division stage”. However, cell division stage is the mitotic phase. In this phase, DNA is already duplicated.

Therefore, option d. is incorrect.

Hence, options a., c, and d. are incorrect.

Conclusion

In the cell cycle, DNA is duplicated in the S phase.

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Answer 4

Question

Chapter 7, Problem 1SQ

Summary Introduction

Introduction: Cell cycle is also known as cell division. It is divided into interphase and mitotic phase. Interphase is divided into G1 phase, S phase, and G2 phase. Mitotic phase is divided into prophase, metaphase, anaphase, and telophase. This is followed by cytokinesis.

Expert Solution & Answer

Answer to Problem 1SQ

Correct answer: Option b. is given as “S phase”. Therefore, option b. is correct.

Explanation of Solution

Reasons for the correct statement:

S-phase is the replicative phase. In this phase DNA replication occurs. Therefore, the amount of genetic material becomes double.

Hence, option b. is correct.

Reasons for the incorrect statements:

Option a. is given as “G1 phase”. However, G1 phase is also known as gap 1 phase. This phase synthesizes the proteins and other factors required for the DNA replication.

Therefore, option a. is incorrect.

Option c. is given as “G2 phase”. However, G2 phase is also known as gap 2 phase. This phase occurs after S-phase.

So, option c. is incorrect.

Option d. is given as “division stage”. However, cell division stage is the mitotic phase. In this phase, DNA is already duplicated.

Therefore, option d. is incorrect.

Hence, options a., c, and d. are incorrect.

Conclusion

In the cell cycle, DNA is duplicated in the S phase.

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Answer 5

Chapter 7, Problem 1SQ

Summary Introduction

Introduction: Cell cycle is also known as cell division. It is divided into interphase and mitotic phase. Interphase is divided into G1 phase, S phase, and G2 phase. Mitotic phase is divided into prophase, metaphase, anaphase, and telophase. This is followed by cytokinesis.

Expert Solution & Answer

Answer to Problem 1SQ

Correct answer: Option b. is given as “S phase”. Therefore, option b. is correct.

Explanation of Solution

Reasons for the correct statement:

S-phase is the replicative phase. In this phase DNA replication occurs. Therefore, the amount of genetic material becomes double.

Hence, option b. is correct.

Reasons for the incorrect statements:

Option a. is given as “G1 phase”. However, G1 phase is also known as gap 1 phase. This phase synthesizes the proteins and other factors required for the DNA replication.

Therefore, option a. is incorrect.

Option c. is given as “G2 phase”. However, G2 phase is also known as gap 2 phase. This phase occurs after S-phase.

So, option c. is incorrect.

Option d. is given as “division stage”. However, cell division stage is the mitotic phase. In this phase, DNA is already duplicated.

Therefore, option d. is incorrect.

Hence, options a., c, and d. are incorrect.

Conclusion

In the cell cycle, DNA is duplicated in the S phase.

Answer 6

Chapter 7, Problem 1SQ

Summary Introduction

Introduction: Cell cycle is also known as cell division. It is divided into interphase and mitotic phase. Interphase is divided into G1 phase, S phase, and G2 phase. Mitotic phase is divided into prophase, metaphase, anaphase, and telophase. This is followed by cytokinesis.

Expert Solution & Answer

Answer to Problem 1SQ

Correct answer: Option b. is given as “S phase”. Therefore, option b. is correct.

Explanation of Solution

Reasons for the correct statement:

S-phase is the replicative phase. In this phase DNA replication occurs. Therefore, the amount of genetic material becomes double.

Hence, option b. is correct.

Reasons for the incorrect statements:

Option a. is given as “G1 phase”. However, G1 phase is also known as gap 1 phase. This phase synthesizes the proteins and other factors required for the DNA replication.

Therefore, option a. is incorrect.

Option c. is given as “G2 phase”. However, G2 phase is also known as gap 2 phase. This phase occurs after S-phase.

So, option c. is incorrect.

Option d. is given as “division stage”. However, cell division stage is the mitotic phase. In this phase, DNA is already duplicated.

Therefore, option d. is incorrect.

Hence, options a., c, and d. are incorrect.

Conclusion

In the cell cycle, DNA is duplicated in the S phase.

Answer 7

Chapter 7, Problem 1SQ

Summary Introduction

Introduction: Cell cycle is also known as cell division. It is divided into interphase and mitotic phase. Interphase is divided into G1 phase, S phase, and G2 phase. Mitotic phase is divided into prophase, metaphase, anaphase, and telophase. This is followed by cytokinesis.

Answer 8

Expert Solution & Answer

Answer to Problem 1SQ

Correct answer: Option b. is given as “S phase”. Therefore, option b. is correct.

Answer 9

Expert Solution & Answer

Answer 10

Expert Solution & Answer

Answer 11

Explanation of Solution

Reasons for the correct statement:

S-phase is the replicative phase. In this phase DNA replication occurs. Therefore, the amount of genetic material becomes double.

Hence, option b. is correct.

Reasons for the incorrect statements:

Option a. is given as “G1 phase”. However, G1 phase is also known as gap 1 phase. This phase synthesizes the proteins and other factors required for the DNA replication.

Therefore, option a. is incorrect.

Option c. is given as “G2 phase”. However, G2 phase is also known as gap 2 phase. This phase occurs after S-phase.

So, option c. is incorrect.

Option d. is given as “division stage”. However, cell division stage is the mitotic phase. In this phase, DNA is already duplicated.

Therefore, option d. is incorrect.

Hence, options a., c, and d. are incorrect.