Cell Biology and Microscopy Concepts

The video tutorial covers the basics of cell biology, including the types of cells, their structures, and functions. It explains the use of microscopes to view cells and the differences between eukaryotic and prokaryotic cells. The video also discusses bacterial growth, cell division through mitosis, and the role of stem cells. Additionally, it covers the processes of diffusion, osmosis, and active transport, providing practical examples and experiments to illustrate these concepts.

What is the main advantage of using an electron microscope over a light microscope?

• It is cheaper to use.

• It allows us to see finer details.

• It is more portable.

• It requires less maintenance.

Which of the following is a characteristic of prokaryotic cells?

• They contain chloroplasts.

• Their DNA is found in a plasmid.

• They have a permanent vacuole.

• They have a nucleus.

What is the primary function of mitochondria in a cell?

• DNA replication

• Respiration

• Protein synthesis

• Photosynthesis

How do bacteria multiply?

• Mitosis

• Binary fission

• Meiosis

• Budding

What is the purpose of using aseptic techniques in bacterial culture experiments?

• To reduce the need for incubation

• To enhance antibiotic effectiveness

• To prevent contamination

• To increase bacterial growth

During mitosis, what happens to the genetic material?

• It is unchanged.

• It is destroyed.

• It is duplicated.

• It is halved.

Where are stem cells found in plants?

• In the meristem

• In the roots

• In the flowers

• In the leaves

What is diffusion?

• Movement of molecules from high to low concentration

• Movement of molecules from low to high concentration

• Movement of water across a membrane

• Movement of ions against a concentration gradient

What is osmosis specifically concerned with?

• Diffusion of water

• Diffusion of glucose

• Passive transport of proteins

• Active transport of ions

What is required for active transport to occur?

• Energy input

• A large surface area

• A semi-permeable membrane

• A concentration gradient