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

3

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

3

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

3

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

4

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

3

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

Theory

CH1 - CHARACTERISTICS AND CLASSIFICATION OF LIVING ORGANISMS

Which characteristic is shown when a person smells a gas in the air?A excretionB movementC respirationD sensitivity

2011 Summer

6

Theory

CH1 - CHARACTERISTICS AND CLASSIFICATION OF LIVING ORGANISMS

The diagram shows four arthropods.[Image_1: Four illustrations labeled Pediculus ×20, Anopheles ×10, Dermacentor ×7, Carcinus ×0.5]How many of the...

2011 Summer

15

Theory

CH1 - CHARACTERISTICS AND CLASSIFICATION OF LIVING ORGANISMS

An organism has dry scales covering its body. To which vertebrate group does it belong? A: amphibian B: fish C: mammal D: reptile

2011 Summer

4

Theory

CH1 - CHARACTERISTICS AND CLASSIFICATION OF LIVING ORGANISMS

The diagram shows an animal. Use the key to identify the animal.1 has legs .......................... go to 2 has no legs ...................... go ...

2011 Summer

3

Theory

CH2 - ORGANIZATION AND MAINTENANCE OF THE ORGANISM

The diagram shows four specialised cells.Which feature is not common to all of these cells?A. cell membraneB. cytoplasmC. diploid number of chromosome...

2011 Summer

11

Theory

CH2 - ORGANIZATION AND MAINTENANCE OF THE ORGANISM

The diagram shows a plant cell.Which labelled structures are found in plant cells but not in animal cells?A P and QB Q and RC R and SD S and T

2011 Summer

8

Theory

CH2 - ORGANIZATION AND MAINTENANCE OF THE ORGANISM

The diagram shows another plant cell.Which feature shows that it is a palisade cell?A a large nucleusB a large vacuoleC a thick cell wallD many chloro...

2011 Summer

4

Theory

CH6 - PLANT NUTRITION

Which structures are adapted for supporting a plant?A. phloem tissuesB. root hair cellsC. stomataD. xylem vessels

2011 Summer

3

Theory

CH2 - ORGANIZATION AND MAINTENANCE OF THE ORGANISM

Which describes the structure and function of a red blood cell? [Table_1]

2011 Summer

2

Theory

CH3 - MOVEMENT IN AND OUT OF CELLS

Boiling potatoes destroys their cell membranes. A peeled, boiled potato strip is placed in a concentrated solution of salts.What takes place?[Table_1]...

2011 Summer

3