iGCSE Cells & Transport

In a classroom experiment, Ella and Oscar observed the movement of ink particles in water. Diffusion is the movement of particles from....

• an area of lower concentration to an area of higher concentration

• an area of higher concentration to an area of lower concentration

What is the name of the process where perfume particles spread out in the air?

• Active transport
• Diffusion
• Osmosis

True or False? The cell wall controls the movement of substances into and out of the cell.

• True
• False

If you place slice of potato in a solution that has a higher sugar concentration than the fluid inside the potato, the potato will ....

• release water and decrease in mass
• absorb water and increase in mass

Which process allows glucose to move from a higher concentration in the gut to a lower concentration in the blood?

• Active transport
• Osmosis
• Diffusion

If the concentration of water inside a cell is lower than outside the cell, what will the net movement of water molecules be?

• Into the cell
• Out of the cell

Which of the following is the function of plant cell walls?

• To carry out photosynthesis
• To control the cell's activities
• To strengthen and support the cell

What is a vacuole?

• A large organelle in a plant cell which is filled with cell sap
• A large organelle in a plant cell which contains chlorophyll

Which of these organelles is found in plant cells but NOT animal cells?

• Mitochondria
• Ribosomes
• Chloroplasts

The active transport of minerals means that they are absorbed into a cell ....

• against the concentration gradient
• down the concentration gradient