30 Questions
What is the primary purpose of microscopy?
To magnify objects too small to be seen by the naked eye
What did Antonie van Leeuwenhoek discover using the microscope?
Animalcules
What is the function of oil immersion when using a microscope?
To increase magnification
What does resolution refer to in microscopy?
The detail maintained by a magnified object
Which type of microscopy is known for enhancing image contrast?
Phase-contrast Microscopy
What is the total magnification when using a High Power Objective and a Triple Lens ocular together?
$600x$
What is the function of the plasma membrane?
Defining the extent of a cell and separating intracellular fluid from extracellular fluid
What is the Fluid Mosaic Model?
A model depicting the plasma membrane as a thin structure composed of lipid and protein molecules
What is the function of Gap Junctions?
Facilitating direct communication and passage of molecules between adjacent cells
What is the role of the Glycocalyx in the plasma membrane?
Creating a carbohydrate-rich area on the cell surface
Which organelle is described as being 'packed with organelles, small structures that perform specific cell functions'?
Cytoplasm
What does the Fluid Mosaic Model depict about the plasma membrane?
A thin structure composed of a double layer of lipid molecules with scattered proteins
What is the main purpose of phase contrast microscopy?
To enhance the contrast of the specimen to the background without staining
What does fluorochroming refer to?
Direct chemical interaction of fluorochrome and the bacterial cell
How does immunofluorescence work?
By conjugating a fluorochrome with a specific antibody
What does fluorescent microscopy employ?
Dyes or fluorochromes that react with visible light
Which statement is true about electron microscopy?
Allows magnification from 10,000x up to 100,000,000x
What determines the color of the fluorescent light in fluorescent microscopy?
The dye and light filter used
What is the process that involves the movement of water molecules from a solution with a high concentration of water molecules to a solution with a lower concentration of water molecules, through a cell's partially permeable membrane?
Osmosis
Which type of solution has lower potential osmotic pressure than the cell?
Hypotonic
What is a solution with a higher potential osmotic pressure and lower water concentration known as?
Hypertonic
Which process involves moving materials from within the cell into the extracellular fluid?
Endocytosis
What are assemblies of integral membrane proteins that modulate ion transport into and out of a cell known as?
Ion pumps
Which term refers to a solution that has the same potential osmotic pressure as the cell?
Isotonic
What is the function of the nucleus within a cell?
Providing instructions for protein synthesis
Which component of chromatin is responsible for packaging and regulating DNA?
Globular histone proteins
What is the primary composition of chromatin within the nucleus?
30% DNA, 60% histone proteins, 10% RNA
Which structure is responsible for separating intracellular and extracellular fluids?
Plasma membrane
What is the main role of the nucleolus within the nucleus?
Producing ribosomes
Which part of the cell is described as a brain-like function and serves as the control center?
Nucleus
Test your knowledge on the cell's control center, plasma membrane, cytoplasm, and gap junctions with this quiz. Learn about the Fluid Mosaic Model and the functions of various organelles within the cell.
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