Cell Cycle and DNA Structure

The video tutorial explains the process of cell division, focusing on the replication of DNA and the formation of new skin cells. It describes how DNA condenses into chromatin and further into chromosomes, forming sister chromatids. The cell cycle is divided into interphase and mitosis, with interphase consisting of G1, S, and G2 phases. During these phases, organelles replicate, DNA is synthesized, and enzymes for cell division are produced. Most eukaryotic cells spend significant time in interphase, with mitosis being a shorter phase.

Why must each cell have a complete set of genetic material before cell division?

• To increase cell size

• To produce more proteins

• To prevent cell death

• To ensure each daughter cell has the same DNA

What is the structure formed when DNA wraps around histone proteins?

• Chromosome

• Chromatin

• Nucleosome

• Chromatid

What is the term for the condensed structure of DNA and proteins?

• Chromatid

• Chromatin

• Nucleosome

• Chromosome

During which phase of interphase do organelles and cytoplasmic components replicate?

• G1 phase

• M phase

• S phase

• G2 phase

What happens during the S phase of interphase?

• Cell division occurs

• DNA replicates

• Organelles replicate

• Enzymes for cell division are produced

Which phase of interphase involves the production of enzymes needed for cell division?

• G2 phase

• S phase

• G1 phase

• M phase

What is the process called when a cell spends a short period of time actually dividing?

• Interphase

• Mitosis

• Cytokinesis

• Meiosis

Which phase of the cell cycle do most eukaryotic cells spend the majority of their time in?

• Meiosis

• Interphase

• Mitosis

• Cytokinesis