Mitosis and Cell Cycle Concepts

The video provides an overview of the cell cycle and mitosis, detailing the stages of interphase (G1, S, G2) and mitosis (prophase, metaphase, anaphase, telophase). It explains the role of mitosis in somatic cell division, highlighting the formation of diploid daughter cells. The video also compares cytokinesis in animal and plant cells and concludes with practice questions to reinforce learning.

What is the primary purpose of the cell cycle?

• To transport nutrients across the cell membrane

• To eliminate waste from the cell

• To facilitate cell division and growth

• To create energy for the cell

Which type of cells undergo mitosis?

• Somatic cells

• Viral cells

• Gametes

• Bacterial cells

During which sub-stage of interphase does DNA replication occur?

• G2 phase

• M phase

• S phase

• G1 phase

What is a key characteristic of prophase in mitosis?

• Chromosomes align at the cell's equator

• Chromosomes condense and spindle fibers form

• Sister chromatids are pulled apart

• The cell membrane pinches inward

What happens during metaphase of mitosis?

• Chromosomes condense

• Chromosomes align at the cell's equator

• Sister chromatids are pulled apart

• The cell membrane pinches inward

During anaphase, what occurs to the sister chromatids?

• They align at the cell's equator

• They condense into chromosomes

• They are pulled to opposite poles of the cell

• They dissolve into the cytoplasm

What marks the beginning of telophase in mitosis?

• Sister chromatids are pulled apart

• Nuclear membranes start to reform

• Chromosomes align at the equator

• The cell membrane pinches inward

How does cytokinesis differ in plant cells compared to animal cells?

• Both plant and animal cells pinch inward

• Both plant and animal cells form a cell plate

• Plant cells pinch inward; animal cells form a cell plate

• Plant cells form a cell plate; animal cells pinch inward

What structure forms in plant cells during cytokinesis?

• Nuclear envelope

• Cleavage furrow

• Cell plate

• Spindle fibers

Which phase of mitosis involves the reformation of the nuclear envelope?

• Anaphase

• Telophase

• Metaphase

• Prophase