Theory

CH5 - ENZYMES

Two enzyme-controlled reactions are shown.[Image_1: amino acids --enzyme 1--> proteins; proteins --enzyme 2--> amino acids]From these reactions, what ...

2010 Winter

2

Theory

CH5 - ENZYMES

Six test-tubes were set up at different temperatures. Each contained identical solutions containing starch and amylase mixtures. The table shows the t...

2010 Winter

2

Theory

CH5 - ENZYMES

When solution X is tested with iodine solution, a blue-black colour is observed.A different solution, Y, is added to a new sample of solution X and th...

2012 Winter

2

Theory

CH5 - ENZYMES

The graph shows the effect of pH on the rate of reaction of three different enzymes. What does the graph show?A Each enzyme works best at a different ...

2012 Winter

1

Theory

CH5 - ENZYMES

What are enzymes made of?A carbohydratesB DNAC fatsD proteins

2011 Summer

2

Theory

CH5 - ENZYMES

At which temperature do most enzymes from the human body become completely denatured?A 0°CB 27°CC 40°CD 65°C

2011 Summer

2

Theory

CH5 - ENZYMES

A human digestive enzyme breaks down its substrate at a fast rate at 35°C.What would occur if the enzyme and substrate were kept at 75°C?A The enzym...

2011 Winter

3

Theory

CH5 - ENZYMES

Which graph shows the effect of temperature on the activity of a human digestive enzyme?

2009 Winter

2

Theory

CH5 - ENZYMES

The graph shows how the rate of an enzyme-controlled reaction changes with temperature.What is happening within the temperature range marked X?A The e...

2010 Summer

1

Theory

CH5 - ENZYMES

The diagram shows the action of amylase. What is the function of the enzyme amylase?A) breaks down the substrate into amino acidsB) changes the produc...

2011 Winter

3

Theory

CH7 - HUMAN NUTRITION

Why does the energy needed by a human increase during the first ten years of life?A. Coordination and responses improve.B. Energy is needed for gamete...

2014 Summer

2

Theory

CH1 - CHARACTERISTICS AND CLASSIFICATION OF LIVING ORGANISMS

Which feature is characteristic of both annelids and arthropods? A) compound eyes B) jointed limbs C) segmented bodies D) wings

2014 Summer

1

Theory

CH2 - ORGANIZATION AND MAINTENANCE OF THE ORGANISM

Which features do animal cells share with plant cells? [Table_1]

2014 Summer

2

Theory

CH1 - CHARACTERISTICS AND CLASSIFICATION OF LIVING ORGANISMS

The diagram shows an animal. Use the key to identify the animal.1 wings present ............................................ go to 2wings absent ........

2014 Summer

2

Theory

CH2 - ORGANIZATION AND MAINTENANCE OF THE ORGANISM

Which pair of statements about a plant cell is correct?[Table_1][Table_1]:| | outer surface of the cell | position of sap vacuole ||---|----...

2014 Summer

1

Theory

CH2 - ORGANIZATION AND MAINTENANCE OF THE ORGANISM

The diagram shows a cell. Which structure is not present?A. cell membraneB. cell wallC. cytoplasmD. nucleus

2014 Summer

2

Theory

CH2 - ORGANIZATION AND MAINTENANCE OF THE ORGANISM

The diagram shows a section through a root.What are the levels of organisation of the labelled structures?[Table_1]

2014 Summer

2

Theory

CH2 - ORGANIZATION AND MAINTENANCE OF THE ORGANISM

Which structures contain a cell nucleus?[Table_1]Table Key:✓ = nucleus✗ = no nucleus

2014 Summer

2

Theory

CH3 - MOVEMENT IN AND OUT OF CELLS

The diagram shows a cell. [Image_1: Diagram of a cell] Which type of cell does the diagram show? A. an animal cell in a concentrated solution of sa...

2014 Summer

2

Theory

CH3 - MOVEMENT IN AND OUT OF CELLS

Two identical cylinders, 40 mm long, are cut from a potato. One (W) is placed in water and the other (X) is placed in a concentrated sugar solution.Wh...

2014 Summer

1