Theory

CH16 - INHERITED CHANGE

(a) Fig. 4.1 shows a section through a maize fruit.Fig. 4.1(i) Name the parts labelled A to D.A .........................................................

2009 Summer

Theory

CH16 - INHERITED CHANGE

(a) The inheritance of coat colour in horses is complex but all horses have one of two base colours, red (chestnut) or black. The base colour is contr...

2009 Summer

Theory

CH16 - INHERITED CHANGE

(a) Explain how changes in the nucleotide sequence of DNA may affect the amino acid sequence in a protein.[7](b) Explain how natural selection may bri...

2009 Summer

Theory

CH16 - INHERITED CHANGE

(a) Complete Fig. 4.1 by writing letters to represent the sets of chromosomes in bread wheat.(b) Explain why hybridisation between emmer wheat and goa...

2009 Winter

Theory

CH16 - INHERITED CHANGE

(a) The fruit fly, Drosophila melanogaster, feeds on sugars found in damaged fruits. A fly with normal features is called a wild type. It has a stripe...

2009 Winter

Theory

CH16 - INHERITED CHANGE

(a) Fig. 5.1 shows a section through part of a human testis.Fig. 5.1Name structures A and B.A ...........................................................

2009 Winter

Theory

CH16 - INHERITED CHANGE

(a) Explain how two parents, both of whom produce normal amounts of AG, can produce a child with Pompe disease...........................................

2009 Winter

Theory

CH16 - INHERITED CHANGE

(a) Explain what is meant by the term gene mutation......................................................................................................

2010 Summer

Theory

CH16 - INHERITED CHANGE

In humans a rare, sex-linked, recessive allele results in a change in the shape of the iris in the eye. This condition is known as cleft iris (CI).(a)...

2010 Summer

Theory

CH16 - INHERITED CHANGE

In humans a rare, sex-linked, recessive allele results in a change in the shape of the iris in the eye. This condition is known as cleft iris (CI).(a)...

2010 Summer

MCQ

CH1 - CELL STRUCTURE

A cell organelle measures $4 \times 10^{-1}$ mm in diameter.What is the diameter in $\mu$m?

2011 Summer

MCQ

CH1 - CELL STRUCTURE

In the following table, which is the correct comparison between light and electron microscopes? [Table_1: light microscope and electron microscope co...

2011 Summer

MCQ

CH1 - CELL STRUCTURE

Which structures are present in a typical plant cell? [Table_1]

2011 Summer

MCQ

CH1 - CELL STRUCTURE

Plant cells are stained and then viewed through a light microscope.Which structures would be clearly visible at a magnification of ×400?

2011 Summer

MCQ

CH1 - CELL STRUCTURE

Which type of cell will contain the highest proportion of single membrane-bound structures?

2011 Summer

MCQ

CH2 - BIOLOGICAL MOLECULES

Four different fruit juices, A, B, C and D, were tested with Benedict's solution. A second sample of each juice was hydrolysed and tested with Benedic...

2011 Summer

MCQ

CH2 - BIOLOGICAL MOLECULES

Which molecular bonds will be broken by hydrolysis when a molecule of glycogen is converted to glucose? [Table_1]

2011 Summer

MCQ

CH2 - BIOLOGICAL MOLECULES

Which set of statements correctly describes haemoglobin?

2011 Summer

MCQ

CH2 - BIOLOGICAL MOLECULES

Some foods contain 'hydrogenated vegetable oils'. These are unsaturated fats that have been converted to saturated fats.Which property of the fats wil...

2011 Summer

MCQ

CH2 - BIOLOGICAL MOLECULES

Which rows show the chemical groups present in the biological molecules listed?[Table_1]

2011 Summer