Theory

CH11 - GAS EXCHANGE IN HUMANS

The diagram illustrates changes in air pressure taking place inside the lungs during a complete cycle of breathing. Atmospheric pressure is 101 kPa.Wh...

2011 Summer

2

Theory

CH11 - GAS EXCHANGE IN HUMANS

The graph shows the rate and depth of a person's breathing before exercise. Which graph shows the rate and depth of breathing of the same person immed...

2011 Summer

2

Theory

CH11 - GAS EXCHANGE IN HUMANS

The table shows the percentage composition of three gases in atmospheric air.[Table_1]What is the composition of the air breathed out by a person?[Tab...

2012 Winter

1

Theory

CH11 - GAS EXCHANGE IN HUMANS

In an experiment, three glass bell jars were set up as shown in the diagram.At the end of the experiment, which bell jar has the most oxygen and which...

2009 Summer

2

Theory

CH11 - GAS EXCHANGE IN HUMANS

What are the properties of an efficient gas exchange system, assuming it has a good blood supply? A. large surface and thick walls B. large surface an...

2010 Winter

2

Theory

CH11 - GAS EXCHANGE IN HUMANS

The diagram represents the exchange of gases during breathing and during respiration in the body.What is represented by X and by Y?[Table_1]\(\begin{a...

2009 Summer

1

Theory

CH11 - GAS EXCHANGE IN HUMANS

(a) Define the term \textit{aerobic respiration}.........................................................................................................

2010 Winter

1

Theory

CH11 - GAS EXCHANGE IN HUMANS

The diagram shows someone blowing up a balloon. What percentage of the gas in the balloon is carbon dioxide? A 0.04% B 0.4% C 4.0% D 40%

2010 Summer

2

Theory

CH11 - GAS EXCHANGE IN HUMANS

(a) In the space below write a balanced chemical equation for anaerobic respiration in muscles.......................................... $\rightarrow$...

2010 Winter

2

Theory

CH11 - GAS EXCHANGE IN HUMANS

The diagram illustrates changes in air pressure taking place inside the lungs during a complete cycle of breathing. Atmospheric pressure is 101 kPa. W...

2011 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

2

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