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

CH13 - EXCRETION IN HUMANS

Which process removes the waste products of metabolism from the body? A. excretion B. nutrition C. reproduction D. respiration

2009 Summer

Theory

CH1 - CHARACTERISTICS AND CLASSIFICATION OF LIVING ORGANISMS

According to the binomial system, how should a human be named?A \, \textit{Homo Sapiens}B \, \textit{Homo sapiens}C \, \textit{homo Sapiens}D \, \text...

2009 Summer

Theory

CH1 - CHARACTERISTICS AND CLASSIFICATION OF LIVING ORGANISMS

Which leaf comes from a monocotyledonous plant?[Image_1: A, B, C, D are images of different leaf types]

2009 Summer

Theory

CH2 - ORGANIZATION AND MAINTENANCE OF THE ORGANISM

The diagram shows a palisade cell from a leaf. Which labelled structure produces oxygen?

2009 Summer

Theory

CH2 - ORGANIZATION AND MAINTENANCE OF THE ORGANISM

Which structure contains genes? A. the cell membrane of an animal cell B. the cytoplasm of an animal cell C. the nucleus of a plant cell D. the vacuol...

2009 Summer

Theory

CH2 - ORGANIZATION AND MAINTENANCE OF THE ORGANISM

The diagram shows a cross section through two guard cells of a leaf. Which labelled structures would also be found in an animal cell? A W and X B ...

2009 Summer

Theory

CH2 - ORGANIZATION AND MAINTENANCE OF THE ORGANISM

The diagram shows some cells from the lining of the trachea (windpipe) in the respiratory tract.What is the function of the structures labelled X?A ab...

2009 Summer

Theory

CH2 - ORGANIZATION AND MAINTENANCE OF THE ORGANISM

Which structures contain a cell nucleus?[Table: | | red blood cell | root hair cell | xylem vessel ||--------|----------------|----------------...

2009 Summer

Theory

CH3 - MOVEMENT IN AND OUT OF CELLS

Which diagram shows the appearance of a plant cell several minutes after it has been placed in a concentrated solution of sugar?

2009 Summer

Theory

CH3 - MOVEMENT IN AND OUT OF CELLS

The dots represent molecules of a gas in four tubes at the beginning of an experiment.In which tube will more molecules move from X to Y than in the o...

2009 Summer