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

3

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

2

Theory

CH5 - ENZYMES

When solution X is tested with iodine solution, a blue-black colour is observed.A different solution, Y, is added to a new sample of solution X and th...

2012 Winter

2

Theory

CH5 - ENZYMES

The graph shows the effect of pH on the rate of reaction of three different enzymes. What does the graph show?A Each enzyme works best at a different ...

2012 Winter

5

Theory

CH5 - ENZYMES

What are enzymes made of?A carbohydratesB DNAC fatsD proteins

2011 Summer

3

Theory

CH5 - ENZYMES

At which temperature do most enzymes from the human body become completely denatured?A 0°CB 27°CC 40°CD 65°C

2011 Summer

3

Theory

CH5 - ENZYMES

A human digestive enzyme breaks down its substrate at a fast rate at 35°C.What would occur if the enzyme and substrate were kept at 75°C?A The enzym...

2011 Winter

5

Theory

CH5 - ENZYMES

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

2009 Winter

2

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

1

Theory

CH5 - ENZYMES

The diagram shows the action of amylase. What is the function of the enzyme amylase?A) breaks down the substrate into amino acidsB) changes the produc...

2011 Winter

5

Theory

CH1 - CHARACTERISTICS AND CLASSIFICATION OF LIVING ORGANISMS

Worms come to the soil surface after heavy rain.Which characteristic of living organisms does this show?A growthB nutritionC reproductionD sensitivity

2013 Summer

3

Theory

CH1 - CHARACTERISTICS AND CLASSIFICATION OF LIVING ORGANISMS

Which animal is \textbf{not} an arthropod?[Image with options A, B, C, D]

2013 Summer

3

Theory

CH1 - CHARACTERISTICS AND CLASSIFICATION OF LIVING ORGANISMS

The diagram shows a sea lion.Which labelled feature shows that this animal is a mammal?

2013 Summer

5

Theory

CH1 - CHARACTERISTICS AND CLASSIFICATION OF LIVING ORGANISMS

The diagram shows an animal found in fresh water. [Image]Use the key to identify the animal.1 body divided into segments ............... go to 2 bo...

2013 Summer

11

Theory

CH8 - TRANSPORT IN PLANTS

Which statement about xylem is correct? A. It carries sucrose. B. It converts light energy to chemical energy. C. It divides actively to help the p...

2013 Summer

5

Theory

CH2 - ORGANIZATION AND MAINTENANCE OF THE ORGANISM

The diagram shows a bacterial cell.How is this cell different from a typical animal cell?A. It has a cell membrane.B. It has cytoplasm.C. It has no ch...

2013 Summer

6

Theory

CH2 - ORGANIZATION AND MAINTENANCE OF THE ORGANISM

The diagram shows a plant cell.In which labelled part of the cell is sugar made?

2013 Summer

3

Theory

CH2 - ORGANIZATION AND MAINTENANCE OF THE ORGANISM

Which of these tissues is not part of the organ with which it is paired?[Table_1]tissueorgan containing this tissueAciliatedrootBmuscleintestineCnervo...

2013 Summer

3

Theory

CH2 - ORGANIZATION AND MAINTENANCE OF THE ORGANISM

The diagram shows a specialised cell.For which function is the cell adapted?A absorption of waterB contraction of musclesC movement of dust particlesD...

2013 Summer

5

Theory

CH3 - MOVEMENT IN AND OUT OF CELLS

The diagram represents two liquids, separated by a membrane through which osmosis can occur.Key- ○ molecule of water- ◎ molecule of dissolved subs...

2013 Summer

3