Cell Transport and Membrane Functions

The video tutorial by Mrs. Wages reviews cell transport, focusing on the structure and function of the cell membrane, passive and active transport processes, and the role of monomers and polymers in cells. It explains how the cell membrane controls the movement of substances, the difference between passive and active transport, and the significance of monomers and polymers in biological systems.

What is the primary function of the cell membrane?

• To synthesize proteins

• To store genetic information

• To produce energy for the cell

• To control what enters and exits the cell

Which part of the phospholipid is attracted to water?

• Cholesterol

• Phosphate head

• Protein channels

• Lipid legs

In passive transport, molecules move from areas of _____ concentration to areas of _____ concentration.

• none; some

• equal; equal

• high; low

• low; high

What is the role of protein channels in facilitated diffusion?

• To break down molecules

• To act as passageways for large or polar molecules

• To provide energy for transport

• To store molecules

During osmosis, water moves towards the _____ side of the membrane.

• hypotonic

• neutral

• hypertonic

• isotonic

In the example given, if the outside concentration is 1.5 grams per liter and the inside is 1 gram per liter, where will the solute move?

• It will move both ways equally

• It will not move

• From outside to inside

• From inside to outside

Which process involves the cell using energy to engulf solid food?

• Exocytosis

• Phagocytosis

• Pinocytosis

• Diffusion

What is required for exocytosis to occur?

• Oxygen

• No energy

• Energy in the form of ATP

• Water

What are the monomers of proteins?

• Nucleotides

• Monosaccharides

• Fatty acids

• Amino acids

Which of the following are examples of nucleic acids?

• Sugars and starches

• Proteins and enzymes

• Lipids and fats

• DNA and RNA