B1.1 carbohydrates and lipids MCQ

What are the components of a phospholipid?

• Two glycerol molecules and a phosphate

• Two fatty acid chains and a phosphate

• Three fatty acid chains and a glycerol

• One fatty acid chain and two phosphates

What is the nature of the fatty acid tails in phospholipids?

• Polar and hydrophilic

• Nonpolar and hydrophobic

• Charged and hydrophilic

• Nonpolar and hydrophilic

What is the nature of the phosphate head in phospholipids?

• Nonpolar and hydrophobic

• Polar and hydrophobic

• Charged and hydrophilic

• Nonpolar and hydrophilic

Why are phospholipids considered amphipathic?

• They have only hydrophilic regions

• They have only hydrophobic regions

• They have both hydrophobic and hydrophilic regions

• They have neither hydrophobic nor hydrophilic regions

What do phospholipids naturally form when added to water?

• Monolayers

• Bilayers

• Micelles

• Vesicles

Which part of the phospholipid faces water?

• Hydrophobic fatty acid tails

• Hydrophilic phosphate heads

• Lipid bilayer

• Protein channels

Where are the hydrophobic fatty acid tails located in a phospholipid bilayer?

• On the surface

• Facing water

• In the middle

• Outside the cell

What are all cell membranes composed of?

• Protein layers

• Carbohydrate chains

• Phospholipid bilayers

• Nucleic acids

What shape is used to represent the phosphate head in a phospholipid diagram?

• Square

• Triangle

• Circle

• Rectangle

How are the fatty acid tails represented in a phospholipid diagram?

• Two circles

• Two lines

• Two squares

• Two triangles