Plant and Animal Cells

Which of the following statements concerning cell membranes is true?  

• Water passes freely through a cell membrane.
• A substance that is soluble in lipids will be repelled by a cell membrane
• The size of a substance will not affect whether it passes through a cell membrane
• Cell membranes allow all substances to pass through freely

The diagram represents an experiment carried out in a school laboratory.  A semi permeable membrane separates two solutions.  The membrane is only permeable to substances small enough to fit through the pores.
Which of the following statements is true?

• Osmosis will favour the movement of water molecules from side B to side A.
• There will be no net movement of water molecules
• Sucrose molecules will readily diffuse from side A to side B
• There will be no change in the volume of solution on either side of the membrane

This question refers to the diagram representing a cell in a salt solution.

Which one of the following statements is correct?

• This cell will gain water while there is no net movement of salt
• This cell will lose both salt and water to the external environment
• Salt will move into the cell and water will move out of the cell
• Water and salt will move into the cell’s cytoplasm

Liver cells are considered to be among the most active cells in the body. Therefore, it is most likely that they will contain large numbers of

• nuclei
• mitochondria
• vesicles
• golgi bodies

The process in which a substance in solution moves from an area of high concentration to an area of lower concentration is called

• diffusion
• absorption
• filtration.
• osmosis

Amino acids are a type of water soluble molecule.  How do they pass through the cell membrane?

• Diffuse across the membrane
• Enter via a vesicle
• Pass between the small pores between the phospholipid molecules
• Transferred by carrier proteins

The production of proteins occurs in the

• endoplasmic reticulum
• mitochondria
• ribosomes.
• nucleus.

The most likely means by which a white blood cell would remove foreign material is

• osmosis.
• exocytosis
• active transport
• phagocytosis

What would happen if a (human) cell was placed in a solution that has a higher concentration of solute than its cytoplasm?

• The volume of the cell increases
• (a)  More solute diffuses out of the cell.
• More water leaves the cell than enters the cell
• The concentration of the solute in the cell decreases

A student who was investigating skin cells noticed that 40 x magnification was not powerful enough. The field of view was 2000 µm. Calculate the new field of view if the student changed the power to 100 x magnification

• 2000 µm
• 4000 µm
• 200 µm
• 800 µm