Theory

CH5 - ENZYMES

(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

Theory

CH5 - ENZYMES

Which graph shows the effect of temperature on the activity of a human digestive enzyme?

2009 Winter

Theory

CH5 - ENZYMES

Which graph shows the effect of temperature on the activity of a human digestive enzyme?

2009 Winter

Theory

CH5 - ENZYMES

The graph shows how the rate of an enzyme-controlled reaction changes with temperature.What is happening within the temperature range marked X?A The ...

2010 Summer

Theory

CH5 - ENZYMES

The graph shows how the rate of an enzyme-controlled reaction changes with temperature.What is happening within the temperature range marked X?A The e...

2010 Summer

Theory

CH5 - ENZYMES

The graph shows how the rate of an enzyme-controlled reaction changes with temperature. What is happening within the temperature range marked X? A....

2010 Summer

Theory

CH5 - ENZYMES

Two enzyme-controlled reactions are shown.[Image_1: amino acids --enzyme 1--> proteins; proteins --enzyme 2--> amino acids]From these reactions, what ...

2010 Winter

Theory

CH5 - ENZYMES

Six test-tubes were set up at different temperatures. Each contained identical solutions containing starch and amylase mixtures. The table shows the t...

2010 Winter

Theory

CH5 - ENZYMES

Two enzyme-controlled reactions are shown.[Image_1: Enzyme Reactions Diagram]From these reactions, what deduction can be made about enzymes?A Enzyme ...

2010 Winter

Theory

CH5 - ENZYMES

Six test-tubes were set up at different temperatures. Each contained identical solutions containing starch and amylase mixtures. The table shows the t...

2010 Winter

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

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

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

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

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

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

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

Theory

CH6 - PLANT NUTRITION

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

2011 Summer

Theory

CH2 - ORGANIZATION AND MAINTENANCE OF THE ORGANISM

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

2011 Summer

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