Theory

CH4 - BIOLOGICAL MOLECULES

A protease is added to a suspension of egg protein in a test-tube and kept at 37°C. After 8 minutes, the protein changes from cloudy to transparent. ...

2010 Summer

2

Theory

CH4 - BIOLOGICAL MOLECULES

Which row correctly identifies the chemical elements found in proteins?[Table_1][Table_1]:| | carbon | hydrogen | oxygen | nitrogen ||-------|--...

2012 Summer

5

Theory

CH4 - BIOLOGICAL MOLECULES

Which solutions are used for testing for protein, reducing sugar and starch?[Table_1]

2010 Summer

2

Theory

CH4 - BIOLOGICAL MOLECULES

Which nutrient produces a purple colour when mixed with biuret solution? A. fat B. protein C. reducing sugar D. starch

2012 Winter

2

Theory

CH4 - BIOLOGICAL MOLECULES

Which row correctly identifies the chemical elements found in proteins?[Table_1]Table Key:✓ = present✗ = absent

2012 Summer

5

Theory

CH4 - BIOLOGICAL MOLECULES

Nutrients are made up of smaller basic units. Nutrients can be identified by food tests. Which nutrient is a protein?[Table_1: nutrient | smaller basi...

2011 Summer

2

Theory

CH4 - BIOLOGICAL MOLECULES

Nutrients are made up of smaller basic units. Nutrients can be identified by food tests.Which nutrient is a protein?nutrient | smaller basic units | f...

2011 Summer

2

Theory

CH4 - BIOLOGICAL MOLECULES

Small molecules are used as the basic units in the synthesis of large food molecules.Which statement is correct?A Amino acids are basic units of carbo...

2011 Winter

3

Theory

CH4 - BIOLOGICAL MOLECULES

A protease is added to a suspension of egg protein in a test-tube and kept at 37°C. After 8 minutes, the protein changes from cloudy to transparent. ...

2010 Summer

3

Theory

CH4 - BIOLOGICAL MOLECULES

Which solutions are used for testing for protein, reducing sugar and starch? [Table_1] Table: | | test for protein | test for reducing sugar | te...

2010 Summer

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