Biology Today and Tomorrow without Physiology (MindTap Course List)
5th Edition
ISBN:9781305117396
Author:Cecie Starr, Christine Evers, Lisa Starr
Publisher:Cecie Starr, Christine Evers, Lisa Starr
Chapter3: Cell Structure
Section: Chapter Questions
Problem 10SQ: Enzymes contained in __________ break down worn-out organelles, bacteria, and other particles. a....
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Concept explainers
Oogenesis
The formation of the ovum (mature female gamete) from undifferentiated germ cells is called oogenesis. This process takes place in the ovaries (female gonads). Oogenesis consists of three stages known as the multiplication phase, growth phase, and maturation phase.
Cell Division
Cell division involves the formation of new daughter cells from the parent cells. It is a part of the cell cycle that takes place in both prokaryotic and eukaryotic organisms. Cell division is required for three main reasons:
Question
True or False: Write TRUE if the statement is true or FALSE if the statement is false in the space before the number.
- Bacteria divide cells by binary fusion.
- Cytokinesis is the division of the cytoplasm.
DNA replication results in identical chromosomes.- If the cell cycle is not regulated, cancer may develop.
- Mitosis occurs in both prokaryotic and eukaryotic cells.
- Mitosis is the process in which the nucleus of the cell divides.
- A cell spends most of its life in growth phase 1 of the cell cycle.
- The correct order of phases of the cell cycle is G1 → S → G2 → M.
- 9. In eukaryotic cells, DNA is replicated during the S phase of the cell cycle
- The S checkpoint, just before entry into S phase, makes the key decision of whether the cell should divide.
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