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12 Questions

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Cell Theory and Cell Types

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Questions and Answers

What is the primary function of the channel protein in the fluid mosaic model of the cell membrane?

To synthesize cholesterol

To transport water-soluble molecules via diffusion (correct)

To regulate the temperature of the cell

To provide structural support to the cell membrane

What is the advantage of having a higher surface area to volume ratio in cells?

It allows for more efficient cellular respiration

It enables the cell to coordinate activities more effectively

It makes the cell more efficient in terms of material transport (correct)

It increases the cell's ability to move materials

What is the term for the process by which water moves from an area of high concentration to an area of low concentration across a semi-permeable membrane?

Active transport

Osmosis (correct)

Passive transport

Diffusion

What is a characteristic of all cells, according to cell theory?

They come from pre-existing cells Signup and view all the answers

What is the primary function of the transmission electron microscope (TEM) in cell biology?

To pass electrons through a sample to make an image Signup and view all the answers

What is the main difference between Archaebacteria and Eubacteria?

Archaebacteria live in extreme environments Signup and view all the answers

What is the role of phospholipids in the fluid mosaic model of the cell membrane?

To make up the bilayer of the cell membrane Signup and view all the answers

What is a characteristic of prokaryotic cells?

They have a singular, circular chromosome of DNA Signup and view all the answers

What is the term for the ability of the cell membrane to control what enters and leaves the cell?

Selective permeability Signup and view all the answers

What is the function of the large central vacuole in plant cells?

Waste disposal and storage Signup and view all the answers

What is a characteristic of animal cells?

They have lysosomes Signup and view all the answers

What is the main difference between Gram positive and Gram negative bacteria?

Gram positive bacteria have a thicker peptidoglycan layer Signup and view all the answers