Theory

CH3 - MOVEMENT IN AND OUT OF CELLS

The dots represent molecules of a gas in four tubes at the beginning of an experiment.In which tube will more molecules move from X to Y than in the o...

2009 Summer

1

Theory

CH3 - MOVEMENT IN AND OUT OF CELLS

Boiling potatoes destroys their cell membranes. A peeled, boiled potato strip is placed in a concentrated solution of salts. [Image_1: diagram of a bo...

2011 Summer

2

Theory

CH3 - MOVEMENT IN AND OUT OF CELLS

A red blood cell is placed in a concentrated sugar solution.What happens and why?A The cell bursts as sugar molecules diffuse into it.B The cell burst...

2011 Summer

2

Theory

CH3 - MOVEMENT IN AND OUT OF CELLS

The diagram shows part of a section through a leaf.Which arrow shows the direction of movement of water by osmosis in a leaf?[Image_1: Diagram of leaf...

2012 Winter

2

Theory

CH3 - MOVEMENT IN AND OUT OF CELLS

Water is a good solvent. What does this mean?A. It dissolves well in many other substances.B. It flows easily through vessels.C. It is permeable to ga...

2010 Winter

2

Theory

CH3 - MOVEMENT IN AND OUT OF CELLS

Osmosis is defined as the diffusion of water molecules A down their concentration gradient through a partially permeable membrane. B down their concen...

2012 Winter

2

Theory

CH3 - MOVEMENT IN AND OUT OF CELLS

The diagram shows two solutions that are separated by a partially permeable membrane.[Image_1: Diagram showing dilute solution of sucrose X and concen...

2010 Winter

2

Theory

CH3 - MOVEMENT IN AND OUT OF CELLS

Which diagram shows the appearance of a plant cell several minutes after it has been placed in a concentrated solution of sugar?

2009 Summer

1

Theory

CH3 - MOVEMENT IN AND OUT OF CELLS

Which structures must be present in a cell for osmosis to take place?A cell (sap) vacuole and cell wallB cell wall and cell membraneC chloroplast a...

2012 Summer

2

Theory

CH3 - MOVEMENT IN AND OUT OF CELLS

On a dry, sunny day, how does water vapour move through the stomata of a leaf?A. into the leaf by diffusionB. into the leaf by osmosisC. out of the le...

2010 Summer

1

MCQ

CH1 - CHARACTERISTICS AND CLASSIFICATION OF LIVING ORGANISMS

Some yeast, sugar and water are mixed in a test-tube. The diagrams show the test-tube at the start and after one hour. Which process causes this chan...

2016 Summer

3

MCQ

CH1 - CHARACTERISTICS AND CLASSIFICATION OF LIVING ORGANISMS

Which name is given to a group of individuals that can reproduce to produce fertile offspring?

2016 Summer

2

MCQ

CH1 - CHARACTERISTICS AND CLASSIFICATION OF LIVING ORGANISMS

Use the key to identify the animal shown in the diagram.

2016 Summer

2

MCQ

CH2 - ORGANIZATION AND MAINTENANCE OF THE ORGANISM

Which organelles are present in large numbers in cells that produce insulin?

2016 Summer

2

MCQ

CH2 - ORGANIZATION AND MAINTENANCE OF THE ORGANISM

The actual thickness of the leaf shown in the diagram is 2000 \mu m, but its thickness in the diagram is 50 mm. What is the magnification of the diag...

2016 Summer

2

MCQ

CH3 - MOVEMENT IN AND OUT OF CELLS

The diagram shows an experiment on osmosis. Which arrow shows the direction of the net movement of water at the start of the experiment?

2016 Summer

1

MCQ

CH3 - MOVEMENT IN AND OUT OF CELLS

Active transport is the movement of

2016 Summer

2

MCQ

CH4 - BIOLOGICAL MOLECULES

When bases pair up in the formation of DNA, what is one of the pairings? [Options provided]

2016 Summer

1

MCQ

CH4 - BIOLOGICAL MOLECULES

Small molecules are used as the basic units in the synthesis of large food molecules. Which statement is correct?

2016 Summer

2

MCQ

CH5 - ENZYMES

Which graph shows the effect of temperature on the activity of an enzyme?

2016 Summer

2