Theory

CH5 - ENZYMES

(a) All organisms depend on enzymes.Define the term enzyme and describe the function of enzymes in living organisms......................................

2012 Summer

1

Theory

CH5 - ENZYMES

The enzyme lactase digests lactose into simple sugars.(a) Define the term _enzyme_.......................................................................

2013 Winter

1

Theory

CH5 - ENZYMES

(a) Enzymes are biological catalysts. (i) Define the term catalyst. [2] (ii) What are enzymes made of? Choose your answer from the list. carb...

2014 Summer

1

Theory

CH5 - ENZYMES

(a) Complete the following paragraph about enzymes. Choose words from this list. Use each word only once or not at all.activators catalysts enzymespro...

2015 Summer

3

Theory

CH5 - ENZYMES

(a) Catalase is an enzyme that catalyses the breakdown of hydrogen peroxide into water and oxygen.The effect of temperature on catalase activity was i...

2018 Winter

3

Theory

CH5 - ENZYMES

(a) Fig. 5.1 shows a diagram of part of the alimentary canal and associated structures.Fig. 5.1(i) State the ...

2018 Winter

3

Theory

CH5 - ENZYMES

(a) Pectinase is an enzyme that is used in the production of apple juice. A student investigated how pH affected the volume of apple juice produced wh...

2020 Winter

2

Theory

CH5 - ENZYMES

(a) (i) State the type of respiration in yeast that produces ethanol.....................................................................................

2018 Winter

2

Theory

CH5 - ENZYMES

(a) (i) The box on the left shows the beginning of a sentence. The boxes on the right show some sentence endings. Draw three straight lines to make th...

2022 Winter

2

Theory

CH5 - ENZYMES

(a) (i) The box on the left shows the beginning of a sentence.The boxes on the right show some sentence endings.Draw two straight lines from ‘Excret...

2020 Winter

2

MCQ

CH1 - CHARACTERISTICS AND CLASSIFICATION OF LIVING ORGANISMS

A living organism, X, can make its own food, get rid of toxic materials and detect and respond to stimuli.What other four processes must organism X ca...

2012 Summer

1

MCQ

CH1 - CHARACTERISTICS AND CLASSIFICATION OF LIVING ORGANISMS

Which group of organisms has the following features?• three pairs of jointed legs• three-part segmented body• one pair of antennae

2012 Summer

2

MCQ

CH1 - CHARACTERISTICS AND CLASSIFICATION OF LIVING ORGANISMS

The table shows some characteristics of four different vertebrates.Which vertebrate is a reptile?[Table_1]

2012 Summer

3

MCQ

CH1 - CHARACTERISTICS AND CLASSIFICATION OF LIVING ORGANISMS

The diagram shows a fish.Use the key to identify the fish.1. black stripe across the eye ...................................... go to 2no black stripe...

2012 Summer

2

MCQ

CH2 - ORGANIZATION AND MAINTENANCE OF THE ORGANISM

The diagram shows a student's drawing of guard cells.Which label is not correct?

2012 Summer

2

MCQ

CH2 - ORGANIZATION AND MAINTENANCE OF THE ORGANISM

The diagram shows a liver cell.Which structure is found in a palisade cell that is not present in this liver cell?

2012 Summer

2

MCQ

CH2 - ORGANIZATION AND MAINTENANCE OF THE ORGANISM

Which diagram shows a plant cell?

2012 Summer

2

MCQ

CH2 - ORGANIZATION AND MAINTENANCE OF THE ORGANISM

Which statement about cells or tissues, is correct?

2012 Summer

1

MCQ

CH2 - ORGANIZATION AND MAINTENANCE OF THE ORGANISM

Why do some root cells have root hairs?

2012 Summer

1

MCQ

CH3 - MOVEMENT IN AND OUT OF CELLS

Which structures must be present in a cell for osmosis to take place?

2012 Summer

2