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

Theory

CH1 - CELL STRUCTURE

Fig. 1.1 shows the outline of a ciliated cell from the human gas exchange system.(a) (i) Inside the ciliated cell in Fig. 1.1, draw the nuclear envelo...

2009 Summer

Theory

CH18 - BIODIVERSITY, CLASSIFICATION AND CONSERVATION

(a) The table below gives some terms that are used in ecology and their definitions. Complete the table.termdefinitionecosystemall the organisms and t...

2009 Summer

Theory

CH4 - CELL MEMBRANES AND TRANSPORT

(a) With reference to Fig. 3.1 and the information above, explain how flatworms survive without a transport system for respiratory gases. ...............

2009 Summer

Theory

CH6 - NUCLEIC ACIDS AND PROTEIN SYNTHESIS

(a) With reference to Fig. 4.1,(i) nameprocess A ..............................................................molecule B ...............................

2009 Summer

Theory

CH7 - TRANSPORT IN PLANTS

Fig. 5.1 shows part of a transverse section of a leaf.(a) Explain, in terms of water potential, how water moves from Q to R..............................

2009 Summer

Theory

CH5 - THE MITOTIC CELL CYCLE

(a) Fig. 6.1 is an electron micrograph of a cancer cell in the process of dividing by mitosis. The stage of mitosis visible in Fig. 6.1 is metaphase.S...

2009 Summer

Theory

CH1 - CELL STRUCTURE

Yeast cells contain enzymes, which catalyse the breakdown of glucose to produce ethanol and carbon dioxide. These products change the environment of t...

2009 Summer

Theory

CH1 - CELL STRUCTURE

J1 is a slide of a stained transverse section of a plant organ.(a) Draw a large, low power, plan diagram of a quarter of the specimen as shown in Fig....

2009 Summer

Theory

CH1 - CELL STRUCTURE

(a) (i) Using the information in Table 1.1, decide which other concentrations to make and complete Table 1.2 including the concentrations from Table 1...

2009 Summer

Theory

CH1 - CELL STRUCTURE

K1 is a slide of a stained transverse section of a plant organ.(a) (i) Draw a large, low power plan diagram of one end of the specimen on K1 as shown ...

2009 Summer