OSciBio_Topic 1 to 3 MCQ

Which of these statements about movement of substances involves diffusion? 1. Movement of carbon dioxide from body cells into the blood stream 2. Movement of glucose from the ileum into the bloodstream 3. Movement of oxygen from the lungs into the bloodstream

• 1 and 2
• 1 and 3
• 2 and 3
• 1, 2 and 3

Six equal sized cylinders of raw potato are placed into different concentrations of sucrose solutions and left for 24 hours. The percentage change in mass is calculated for each cylinder. The results are shown. What is the percentage concentration of sucrose in the cells of the potato cylinders?

• 30%
• 40%
• 50%
• 60%

An experiment was set up using the equipment below. The potato piece was removed from the distilled water, placed into the concentrated salt solution and left for 10 minutes. Which statement describes the overall result of this experiment?

• Salt moves from the potato into the salt solution.
• Salt moves from the salt solution into the water.
• Water moves from the potato into the salt solution.
• Water moves from the salt solution into the potato.

How does oxygen move from an alveolus to a surrounding capillary in the lungs?

• by diffusion
• by osmosis
• by translocation
• by transpiration

A section through an alveolus and a blood capillary is shown. Which statement is correct?

• Oxygen moves from Q to R by diffusion.
• Oxygen moves from Q to R by osmosis.
• Oxygen moves from R to P by diffusion.
• Oxygen moves from R to P by osmosis.

An investigation is carried out to investigate osmosis. Potato slices of the same mass, size and shape are put into four beakers containing different liquids. In which liquid would the potato slice gain most mass?

• concentrated salt solution
• dilute sugar solution
• distilled water
• hydrochloric acid

A piece of plant tissue is transferred from a beaker of water into a concentrated sugar solution. Which row correctly describes what happens?

• A
• B
• C
• D

Root hair cells have extensions shown below. What is the purpose of these extensions?

• They increase surface area for water and ion uptake.
• They increase surface area for water and sugar uptake.
• They make cells thin for water and sugar uptake.
• They make cells thin for sugar and ion uptake.

The diagram shows a plant cell. Which structures are found in both plant and animal cells?

• 1 and 2
• 2 and 3
• 4 and 5
• 5 and 6

The diagram shows an organism called Euglena. Euglena is a single-celled organism that can photosynthesize. Which label points to the structure that enables it to photosynthesize.

• A
• B
• C
• D