Question
16. In the beginning of the eukaryotic cell cycle, the cell grows and copies its and .17. After a chromosome is duplicated, the two copies are called .18. Where are chromatids held together?19. What happens during the first stage of the cell cycle in a eukaryotic cell?Copyright © by Holt, Rinehart and Winston. All rights reserved. Holt California Life Science 72 The Cell in Action
binary fission
original dna
complex structure
46
8
48
homolauges
Name ClassDate Directed Reading B continued20. What happens during the second stage of the cell cycle in a eukaryotic cell?21. The four phases of mitosis are , , , and .22. What happens during the third stage of the cell cycle in a eukaryotic cell?23. Before mitosis begins, are copied. Copyright © by Holt, Rinehart and Winston. All rights reserved. Holt California Life Science 73 The Cell in Action
Name ClassDate Directed Reading B continued Use the diagram below to answer questions 24–29, which describe the phases of the cell cycle. Write the correct phase in the space provided for each question, using “Interphase,” “Mitosis Phase 1,” “Mitosis Phase 2,” “Mitosis Phase 3,” “Mitosis Phase 4,” or “Cytokinesis.” _______________________ 24. The chromatids separate and move to opposite sides of the cell. _______________________ 25. The nuclear membrane is dissolved. Paired chromosomes align at the cell’s equator. _______________________ 26. Before mitosis begins, chromosomes are copied. _______________________ 27. A nuclear membrane forms around each set of chromosomes, and the chromosomes decondense. Mitosis is complete. _______________________ 28. Mitosis begins. Chromosomes condense from long strands into rodlike structures. _______________________ 29. In cells that lack a cell wall, the cell pinches in two. In cells that have a cell wall, a cell plate forms and separates the two new cells. Mitosis Phase 1 Mitosis Phase 2 Mitosis Phase 3Mitosis Phase 4 Interphase Cytokinesis Copyright © by Holt, Rinehart and Winston. All rights reserved. Holt California Life Science 74 The Cell in Action
Name Class Date30. How do animal cells without cell walls divide their cytoplasm during cytokinesis?31. How do plant cells with cell walls divide their cytoplasm during cytokinesis?CONTROL OF THE CELL CYCLE ______ 32. After which stage in the cell cycle is each new cell an exact copy of the parent cell?a. interphaseb. mitosisc. cytokinesisd. prophase ______ 33. Which of the following report cell conditions and control the cell cycle?a. feedback switchesb. DNAc. homologous chromosomesd. centromeres34. A tumor in which the cells begin dividing at an uncontrolled rate is called
binary fission
original dna
complex structure
46
8
48
homolauges
Name ClassDate Directed Reading B continued20. What happens during the second stage of the cell cycle in a eukaryotic cell?21. The four phases of mitosis are , , , and .22. What happens during the third stage of the cell cycle in a eukaryotic cell?23. Before mitosis begins, are copied. Copyright © by Holt, Rinehart and Winston. All rights reserved. Holt California Life Science 73 The Cell in Action
Name ClassDate Directed Reading B continued Use the diagram below to answer questions 24–29, which describe the phases of the cell cycle. Write the correct phase in the space provided for each question, using “Interphase,” “Mitosis Phase 1,” “Mitosis Phase 2,” “Mitosis Phase 3,” “Mitosis Phase 4,” or “Cytokinesis.” _______________________ 24. The chromatids separate and move to opposite sides of the cell. _______________________ 25. The nuclear membrane is dissolved. Paired chromosomes align at the cell’s equator. _______________________ 26. Before mitosis begins, chromosomes are copied. _______________________ 27. A nuclear membrane forms around each set of chromosomes, and the chromosomes decondense. Mitosis is complete. _______________________ 28. Mitosis begins. Chromosomes condense from long strands into rodlike structures. _______________________ 29. In cells that lack a cell wall, the cell pinches in two. In cells that have a cell wall, a cell plate forms and separates the two new cells. Mitosis Phase 1 Mitosis Phase 2 Mitosis Phase 3Mitosis Phase 4 Interphase Cytokinesis Copyright © by Holt, Rinehart and Winston. All rights reserved. Holt California Life Science 74 The Cell in Action
Name Class Date30. How do animal cells without cell walls divide their cytoplasm during cytokinesis?31. How do plant cells with cell walls divide their cytoplasm during cytokinesis?CONTROL OF THE CELL CYCLE ______ 32. After which stage in the cell cycle is each new cell an exact copy of the parent cell?a. interphaseb. mitosisc. cytokinesisd. prophase ______ 33. Which of the following report cell conditions and control the cell cycle?a. feedback switchesb. DNAc. homologous chromosomesd. centromeres34. A tumor in which the cells begin dividing at an uncontrolled rate is called
Answers
GPT-4o mini
Sure! Here are the answers to your questions based on the provided context:
16. In the beginning of the eukaryotic cell cycle, the cell grows and copies its **DNA** and **organelles**.
17. After a chromosome is duplicated, the two copies are called **sister chromatids**.
18. Chromatids are held together at the **centromere**.
19. During the first stage of the cell cycle in a eukaryotic cell, the cell **grows and prepares for DNA replication**.
20. During the second stage of the cell cycle in a eukaryotic cell, the cell **duplicates its DNA**.
21. The four phases of mitosis are **prophase, metaphase, anaphase, and telophase**.
22. During the third stage of the cell cycle in a eukaryotic cell, the cell **undergoes mitosis (the division of the nucleus)**.
23. Before mitosis begins, **chromosomes are copied**.
For questions 24-29, here are the corresponding phases:
24. The chromatids separate and move to opposite sides of the cell. - **Mitosis Phase 3 (Anaphase)**
25. The nuclear membrane is dissolved. Paired chromosomes align at the cell’s equator. - **Mitosis Phase 2 (Metaphase)**
26. Before mitosis begins, chromosomes are copied. - **Interphase**
27. A nuclear membrane forms around each set of chromosomes, and the chromosomes decondense. Mitosis is complete. - **Mitosis Phase 4 (Telophase)**
28. Mitosis begins. Chromosomes condense from long strands into rodlike structures. - **Mitosis Phase 1 (Prophase)**
29. In cells that lack a cell wall, the cell pinches in two. In cells that have a cell wall, a cell plate forms and separates the two new cells. - **Cytokinesis**
30. Animal cells without cell walls divide their cytoplasm during cytokinesis by **forming a cleavage furrow that pinches the cell into two**.
31. Plant cells with cell walls divide their cytoplasm during cytokinesis by **forming a cell plate that develops into a new cell wall between the daughter cells**.
32. After which stage in the cell cycle is each new cell an exact copy of the parent cell?
b. **mitosis**
33. Which of the following report cell conditions and control the cell cycle?
a. **feedback switches**
34. A tumor in which the cells begin dividing at an uncontrolled rate is called **malignant (or cancerous)**.
If you have more questions or need clarification on any topic, feel free to ask!
16. In the beginning of the eukaryotic cell cycle, the cell grows and copies its **DNA** and **organelles**.
17. After a chromosome is duplicated, the two copies are called **sister chromatids**.
18. Chromatids are held together at the **centromere**.
19. During the first stage of the cell cycle in a eukaryotic cell, the cell **grows and prepares for DNA replication**.
20. During the second stage of the cell cycle in a eukaryotic cell, the cell **duplicates its DNA**.
21. The four phases of mitosis are **prophase, metaphase, anaphase, and telophase**.
22. During the third stage of the cell cycle in a eukaryotic cell, the cell **undergoes mitosis (the division of the nucleus)**.
23. Before mitosis begins, **chromosomes are copied**.
For questions 24-29, here are the corresponding phases:
24. The chromatids separate and move to opposite sides of the cell. - **Mitosis Phase 3 (Anaphase)**
25. The nuclear membrane is dissolved. Paired chromosomes align at the cell’s equator. - **Mitosis Phase 2 (Metaphase)**
26. Before mitosis begins, chromosomes are copied. - **Interphase**
27. A nuclear membrane forms around each set of chromosomes, and the chromosomes decondense. Mitosis is complete. - **Mitosis Phase 4 (Telophase)**
28. Mitosis begins. Chromosomes condense from long strands into rodlike structures. - **Mitosis Phase 1 (Prophase)**
29. In cells that lack a cell wall, the cell pinches in two. In cells that have a cell wall, a cell plate forms and separates the two new cells. - **Cytokinesis**
30. Animal cells without cell walls divide their cytoplasm during cytokinesis by **forming a cleavage furrow that pinches the cell into two**.
31. Plant cells with cell walls divide their cytoplasm during cytokinesis by **forming a cell plate that develops into a new cell wall between the daughter cells**.
32. After which stage in the cell cycle is each new cell an exact copy of the parent cell?
b. **mitosis**
33. Which of the following report cell conditions and control the cell cycle?
a. **feedback switches**
34. A tumor in which the cells begin dividing at an uncontrolled rate is called **malignant (or cancerous)**.
If you have more questions or need clarification on any topic, feel free to ask!