Active Transport and Cell Processes

What is active transport?

• Movement of water only

• Movement of molecules from high to low concentration

• Movement of particles using energy against a concentration gradient

• A type of osmosis

Which part of the cell provides energy for active transport?

• Nucleus

• Mitochondria

• Ribosomes

• Chloroplasts

Which of the following processes do not need energy?

• Active transport

• Osmosis

• Diffusion

• Both b and c

What type of gradient does active transport work against?

• Temperature gradient

• Pressure gradient

• Concentration gradient

• Osmotic gradient

Which cells use active transport to absorb ions?

• Xylem cells

• Root hair cells

• Leaf epidermal cells

• Phloem cells

What is the energy source for active transport?

• Sunlight

• Energy produced from respiration

• Chlorophyll

• Proteins in membranes

Which molecule moves by osmosis?

• Ions

• Oxygen

• Water

• Glucose

Which of these describes diffusion?

• Movement of particles from low to high concentration

• Movement of water molecules only

• Movement of particles from high to low concentration

• Movement requiring energy

What happens if there is no energy available for active transport?

• It still continues

• The particles stop moving

• Active transport stops

• Diffusion takes over

Which process is most important for ion absorption in plants?

• Osmosis

• Diffusion

• Active transport

• Photosynthesis