IB Biology: Movement Across Plasma Membrane Online Test

The energy needed to power the sodium-potassium pump is provided by the

A saturated suspension of starch is enclosed in a bag formed from dialysis tubing, a material through which water can pass but starch cannot. The bag with the starch is placed into a beaker of distilled water. All of the following are expected to occur except

Pinocytosis involves the transport of

Which of the following correctly describes exocytosis?

Substances that can pass through cell membrane by diffusion include:-

The sodium-potassium pump transports

What is the correct sequence of events during exocytosis?

I- Formation of a vesicle by the Golgi apparatus.

II- Secretion of the vesicle's contents.

III- Fusion of the vesicle with the plasma membrane.

IV- Movement of the vesicle towards the plasma membrane.

Which statements are characteristics of diffusion through membranes? ( I- Polysaccharides can be transported; II- It can be facilitated by special channels; III- It is affected by concentration gradient )

Which of the following is required for osmosis to occur?

What is facilitated diffusion?

Which process allows the movement of molecules that are too large to pass in through a cell surface membrane?

What is essential for diffusion?

Which of the following is a feature of exocytosis but not endocytosis?

What process involves the movement of solvent through a semi-permeable membrane from a region of low solute concentration to a region of high solute concentration?

Which pair of factors is inversely proportional to the rate of diffusion?



This test concerns on the following assessment statement from the IB syllabus guide 2009:-

2.4.4, 2.4.5, 2.4.6, 2.4.7, 2.4.8

2.4.4:- Define diffusion and osmosis.

2.4.5:- Explain passive transport across membranes by simple diffusion and facilitated diffusion.

2.4.6:- Explain the role of protein pumps and ATP in active transport across membranes.

2.4.7:- Explain how vesicles are used to transport materials within a cell between the rough endoplasmic reticulum, Golgi apparatus, and plasma membrane.

2.4.8:- Describe the fluidity of the membrane allows it ti change shape, break and re-form during endocytosis and exocytosis.





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