Cell Division and Genetic Mutations

The video tutorial explains carcinogenesis, focusing on how complex organ systems are made up of tissues and cells, each containing DNA. Mutations in DNA can be inherited or occur spontaneously, affecting cell functions. Carcinogens like radiation can alter DNA, leading to uncontrolled cell growth. Genes play a crucial role in cell division, acting as on/off switches. Growth factors, both natural and external, influence cell proliferation. Without proper regulation, damaged cells can grow exponentially.

What is the primary structural unit of organs in the body?

• Genes

• Cells

• Tissues

• DNA

How can a mutation in DNA affect a cell?

• It can alter the cell's functions

• It can change the cell's color

• It can make the cell invisible

• It can make the cell larger

Which of the following can cause changes in DNA?

• Carcinogens

• Sunlight

• Oxygen

• Water

What is the process called when a cell divides to create two new cells?

• Fusion

• Fission

• Mitosis

• Meiosis

What role do tumor suppressor genes play in cell growth?

• They repair DNA

• They stop cell growth

• They produce energy

• They promote cell growth

Which type of gene acts like an 'on' switch for cell growth?

• Tumor suppressor genes

• Structural genes

• Repair genes

• Oncogenes

What is the effect of damaged tumor suppressor genes?

• They fail to stop cell growth

• They change cell color

• They enhance cell repair

• They increase cell energy

What can happen if growth factors are overexpressed?

• Decreased cell division

• No change in cell division

• Increased cell division

• Cell death

How do external chemicals affect growth factors?

• They can mimic or change their amounts

• They have no effect

• They enhance their function

• They destroy them

What is a potential outcome of exponential growth of damaged cells?

• Cancer development

• Increased lifespan

• Improved health

• Organ repair