Theory

CH20 - BIOTECHNOLOGY AND GENETIC ENGINEERING

(a) Enzymes in the fungus are used to make penicillin.Explain why there is a water jacket around the fermenter and why acids or alkalis are added to t...

2011 Winter

3

Theory

CH20 - BIOTECHNOLOGY AND GENETIC ENGINEERING

(a) (i) Explain why the milk must be cooled before the bacteria are added................................................................................

2010 Summer

1

Theory

CH20 - BIOTECHNOLOGY AND GENETIC ENGINEERING

(a) (i) State two types of natural disaster that occur suddenly and may lead to severe food shortages.1..................................................

2010 Summer

2

Theory

CH20 - BIOTECHNOLOGY AND GENETIC ENGINEERING

(a) Explain what is meant by the term antibiotic.........................................................................................................

2010 Summer

2

Theory

CH20 - BIOTECHNOLOGY AND GENETIC ENGINEERING

A small quantity of a fungus was put into a fermenter with all the nutrients required for growth and kept at an appropriate temperature.The fungus was...

2011 Winter

2

Theory

CH20 - BIOTECHNOLOGY AND GENETIC ENGINEERING

What term is used for the transference of a gene from one organism to another?A. artificial selectionB. genetic engineeringC. mutationD. natural selec...

2010 Summer

2

Theory

CH20 - BIOTECHNOLOGY AND GENETIC ENGINEERING

(a) Fig. 3.1 shows the activity of an enzyme produced by bacteria that live in very hot water.[Image_1: Graph showing enzyme activity]Using the inform...

2009 Summer

2

Theory

CH20 - BIOTECHNOLOGY AND GENETIC ENGINEERING

(a) Four definitions of terms used in genetics are shown in Table 5.1.Table 5.1[Table_1]For each of the definitions, select an appropriate term from t...

2009 Winter

2

Theory

CH20 - BIOTECHNOLOGY AND GENETIC ENGINEERING

(a) Four definitions of terms used in genetics are shown in Table 5.1.Table 5.1[Table_1]For each of the definitions, select an appropriate term from t...

2009 Winter

2

Theory

CH20 - BIOTECHNOLOGY AND GENETIC ENGINEERING

(a) Starch, glucose and fructose are carbohydrates. Fructose syrup is used as a sweetening agent as an alternative to sucrose.The flow chart in Fig. 3...

2013 Winter

3

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