The video tutorial explains the life cycle of a cell, focusing on interphase, where a cell spends most of its life. It describes the cell's growth, protein production, and DNA replication during interphase. The tutorial also covers the structure of a cell, including the chromatin form of DNA and the role of the centrosome. It details the replication of chromosomes and the phases of growth (G1, S, and G2) leading up to mitosis, emphasizing the importance of these processes for cell division.

What is the primary phase where a cell spends most of its life?

• Apoptosis

• Cytokinesis

• Interphase

• Mitosis

During interphase, how are chromosomes typically arranged?

• Tightly bound and visible

• In pairs and visible

• Stacked and visible

• Unwound in chromatin form

What is the role of the centrosome in a cell?

• It stores nutrients

• It synthesizes proteins

• It is important for mitosis

• It produces energy

What happens during the G1 phase of the cell cycle?

• Chromosome alignment

• DNA replication

• Cell division

• Cell growth and nutrient intake

What is the main event during the S-phase of the cell cycle?

• Nutrient absorption

• Cell division

• DNA replication

• Protein synthesis

What are sister chromatids?

• Two separate cells

• Two connected centrosomes

• Two different chromosomes

• Two identical copies of a chromosome

What connects sister chromatids?

• Centrosome

• Centromere

• Chromatin

• Nuclear membrane

What is the G2 phase known for?

• Initial cell growth

• Final preparation for mitosis

• DNA unwinding

• Protein degradation

What is the difference between a chromatid and a chromosome during interphase?

• A chromatid is a protein, while a chromosome is DNA

• A chromatid is a cell organelle, while a chromosome is not

• A chromatid is visible, while a chromosome is not

• A chromatid is a single DNA molecule, while a chromosome is a pair of chromatids

What phase follows the G2 phase in the cell cycle?

• Mitosis

• S-phase

• Interphase

• G1 phase