Cell Structure and Function Concepts

The video tutorial covers cell structure and function, focusing on microscopy techniques, cell fractionation, and the plasma membrane. It explains the differences between light and electron microscopes, the process of cell fractionation, and the components of the plasma membrane, including phospholipids and cholesterol. The tutorial also discusses transport mechanisms across membranes, such as diffusion and osmosis, and provides a brief overview of cell organelles like the nucleus and mitochondria.

What is the primary function of a light microscope?

• To magnify objects up to 10,000 times

• To observe the internal structure of cells

• To study the surface of samples

• To magnify objects up to 1,000 times

Which type of electron microscope is best for viewing the surface of a sample?

• Transmission Electron Microscope

• Scanning Electron Microscope

• Light Microscope

• Fluorescence Microscope

What is the main disadvantage of using electron microscopes?

• They have lower magnification compared to light microscopes

• They cannot be used to view live organisms

• They are less detailed than light microscopes

• They are more expensive than light microscopes

What is the primary component of the plasma membrane?

• Carbohydrates

• Phospholipids

• Cholesterol

• Proteins

Which type of protein spans the entire plasma membrane?

• Transmembrane Protein

• Integral Protein

• Channel Protein

• Peripheral Protein

How do unsaturated fatty acids affect the plasma membrane?

• They make the membrane more rigid

• They make the membrane more fluid

• They decrease the membrane's permeability

• They increase the membrane's thickness

What type of transport requires energy to move molecules across the plasma membrane?

• Osmosis

• Active Transport

• Passive Transport

• Facilitated Diffusion

Which organelle is known as the powerhouse of the cell?

• Endoplasmic Reticulum

• Golgi Apparatus

• Mitochondria

• Nucleus

What is the function of the Golgi apparatus?

• Energy production

• Detoxification of toxins

• Packaging and distribution of proteins

• Protein synthesis

Which structure is unique to plant cells?

• Lysosome

• Chloroplast

• Nucleus

• Mitochondria