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

1

Theory

CH4 - BIOLOGICAL MOLECULES

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

2012 Summer

3

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

1

Theory

CH4 - BIOLOGICAL MOLECULES

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

2012 Summer

3

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

1

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

1

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

1

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

2010 Summer

2

Theory

CH1 - CHARACTERISTICS AND CLASSIFICATION OF LIVING ORGANISMS

What is defined as the chemical reactions that break down food molecules in cells to release energy?A excretionB movementC nutritionD respiration

2010 Summer

1

Theory

CH1 - CHARACTERISTICS AND CLASSIFICATION OF LIVING ORGANISMS

The diagram shows an arthropod animal. Which features are characteristic of all arthropods?A. jointed legs and segmented bodyB. jointed legs and thora...

2010 Summer

2

Theory

CH1 - CHARACTERISTICS AND CLASSIFICATION OF LIVING ORGANISMS

The diagram shows a section through a flower.Using the key, identify this flower.1. sepals present .................................................. ...

2010 Summer

3

Theory

CH2 - ORGANIZATION AND MAINTENANCE OF THE ORGANISM

Which row shows the most likely number of chloroplasts in three types of cell in a leaf?[Table_1]

2010 Summer

2

Theory

CH2 - ORGANIZATION AND MAINTENANCE OF THE ORGANISM

The diagram shows some liver cells as they appear under the microscope. How many cell walls can be seen?A 0 B 2 C 3 D 5

2010 Summer

1

Theory

CH2 - ORGANIZATION AND MAINTENANCE OF THE ORGANISM

Which row shows the structures present in plant and animal cells?[Table_1: | | cell wall | cytoplasm | nucleus | cell membrane ||--------|-----...

2010 Summer

2

Theory

CH2 - ORGANIZATION AND MAINTENANCE OF THE ORGANISM

Which structure is at a different level of organisation from the other three?A) kidneyB) liverC) neuroneD) testis

2010 Summer

2

Theory

CH2 - ORGANIZATION AND MAINTENANCE OF THE ORGANISM

Which diagram shows one organ only?[Image_1 with diagrams labeled A, B, C, D]

2010 Summer

2

Theory

CH3 - MOVEMENT IN AND OUT OF CELLS

On a dry, sunny day, how does water vapour move through the stomata of a leaf?A. into the leaf by diffusionB. into the leaf by osmosisC. out of the le...

2010 Summer

1

Theory

CH3 - MOVEMENT IN AND OUT OF CELLS

The diagram shows an experiment using a potato.Which shows the result of the experiment after 24 hours?ABCD

2010 Summer

1