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

Theory

CH1 - CHARACTERISTICS AND CLASSIFICATION OF LIVING ORGANISMS

(a) Fig. 1.1 shows six species of reptiles.[Image_1: Fig. 1.1](i) Use the key to identify each species. Write the letter of each species (A–F) in th...

2020 Spring

6

Theory

CH11 - GAS EXCHANGE IN HUMANS

(a) A class of students measured their breathing rates during different activities. Average breathing rates for the class were calculated. Student A c...

2020 Spring

6

Theory

CH17 - INHERITANCE

(a) The length of hair in cats is controlled by a single gene.• The allele for short hair is dominant – $H$• The allele for long hair is recessi...

2020 Spring

1

Theory

CH16 - REPRODUCTION

(a) A study estimated the percentage effectiveness of different types of birth control. Table 4.1 shows examples of four different categories of birth...

2020 Spring

1

Theory

CH19 - ORGANISMS AND THEIR ENVIRONMENT

(a) Fig. 5.1 is a photograph of a giant panda. State the name of the vertebrate group that giant pandas belong to. ...................................

2020 Spring

2

Theory

CH8 - TRANSPORT IN PLANTS

(a) Complete the definition of the term transpiration. Transpiration is the loss of water vapour from plant leaves by ...................................

2020 Spring

3

Theory

CH7 - HUMAN NUTRITION

(a) Fig. 7.1 is a diagram of the alimentary canal and associated organs. The boxes on the left show the letters on Fig. 7.1.The boxes in the middle sh...

2020 Spring

2

Theory

CH21 - HUMAN INFLUENCES ON ECOSYSTEMS

(a) The box on the left contains the phrase ‘intensive livestock farming’.The boxes on the right contain some sentence endings.Draw two lines from...

2020 Spring

3

MCQ

CH1 - CHARACTERISTICS AND CLASSIFICATION OF LIVING ORGANISMS

The diagram shows what happened in an experiment with plant seedlings. Which characteristic of living things made the seedlings grow towards the lig...

2020 Summer

2

MCQ

CH1 - CHARACTERISTICS AND CLASSIFICATION OF LIVING ORGANISMS

A rat has the scientific name Rattus rattus.What do the two parts of this name refer to?

2020 Summer

2