Passive and Active Transport Concepts

The video tutorial covers cell transport, focusing on the movement of molecules across the cell membrane. It explains the difference between small and large molecules, passive and active transport, and the role of protein receptors in cell communication. The tutorial also includes a state lab experiment on diffusion and discusses osmosis in red onion cells, highlighting the use of indicators like Benedict's solution and iodine.

What is the term used to describe the cell membrane's ability to allow certain molecules to pass based on size?

• Non-selective

• Permeable

• Impermeable

• Selectively permeable

Which of the following is NOT a small molecule that can pass through the cell membrane?

• Starch

• Water

• Glucose

• Iodine

What is another name for passive transport?

• Osmosis

• Diffusion

• Active transport

• Facilitated transport

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

• low; low

• low; high

• high; low

• equal; equal

What is required for active transport to occur?

• Water

• Oxygen

• Glucose

• ATP

Active transport is similar to which of the following activities?

• Floating in water

• Riding a bike downhill

• Walking on a flat surface

• Riding a bike uphill

When determining the type of transport, why is it important to count the molecules on each side of the membrane?

• To determine the size of the molecules

• To measure the speed of transport

• To identify the type of molecules

• To decide if the transport is active or passive

In the state lab experiment, what color does the cell turn when iodine reacts with starch?

• Orange

• Milky white

• Blue-black

• Amber

What happens to water in a cell when placed in a saltwater solution?

• Water moves out of the cell

• Water moves into the cell

• Water concentration remains the same

• Salt moves into the cell

What is the initial color of Benedict's solution before it reacts with glucose?

• Orange

• Amber

• Light bright blue

• Blue-black