What are the smallest living functional units in biology?

• Tissues

• Organs

• Cells

• Molecules

How many different types of cells are there?

• Over 100

• Over 200

• Over 250

• Over 300

What is one of the characteristics of the different types of cells?

• They are all identical in structure and function

• They are specialized in structure and function

• They are not specialized in structure and function

• They do not have any specific structure or function

From where do cells arise?

• From non-living matter

• From existing cells

• From chemical reactions

• From spontaneous generation

What does the plasma membrane separate?

• Intracellular fluid (ICF) from extracellular fluid (ECF)

• Cytoplasm from nucleus

• Mitochondria from cytoplasm

• Ribosomes from endoplasmic reticulum

Which of the following is NOT a component of the plasma membrane?

• Membrane lipids

• Membrane proteins

• Surface sugars

• Nucleic acids

What forms the glycocalyx on the plasma membrane?

• Membrane lipids

• Membrane proteins

• Surface sugars

• Cholesterol

Which of the following is a type of protein found in the plasma membrane?

• Integral membrane protein

• Peripheral membrane protein

• Channel protein

• All of the above

What percentage of the lipid bilayer is made up of phospholipids?

• 50%

• 75%

• 25%

• 100%

Which part of the phospholipid is hydrophilic?

• Fatty acid tails

• Glycerol

• Phosphate heads

• Cholesterol