Theory

CH9 - GAS EXCHANGE AND SMOKING

(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

MCQ

CH9 - GAS EXCHANGE AND SMOKING

What would be seen in an electron micrograph of a bronchus wall?1 cartilage cells2 ciliated cells3 exocytotic vesicles

2009 Winter

MCQ

CH9 - GAS EXCHANGE AND SMOKING

An oxygen molecule diffuses directly from the air in an alveolus to haemoglobin in a red blood cell. What is the minimum number of cell surface membr...

2009 Winter

MCQ

CH9 - GAS EXCHANGE AND SMOKING

A disease damages alveoli. Which effect does this have on the gas exchange surface area and volume of the lungs? [Table_1]

2009 Winter

MCQ

CH9 - GAS EXCHANGE AND SMOKING

A disease damages alveoli.Which effect does this have on the gas exchange surface area and volume of the lungs?[Table_1]

2009 Winter

MCQ

CH9 - GAS EXCHANGE AND SMOKING

An oxygen molecule diffuses directly from the air in an alveolus to haemoglobin in a red blood cell. What is the minimum number of cell surface membr...

2009 Winter

MCQ

CH9 - GAS EXCHANGE AND SMOKING

What would be seen in an electron micrograph of a bronchus wall?1. cartilage cells2. ciliated cells3. exocytotic vesicles

2009 Winter

MCQ

CH9 - GAS EXCHANGE AND SMOKING

Below are correct statements comparing blood, tissue fluid and lymph in a capillary bed.• W lacks large plasma proteins and red blood cells and has ...

2009 Winter

Theory

CH9 - GAS EXCHANGE AND SMOKING

Fig. 3.1 is an electron micrograph of a lymphocyte in the process of cell division during an immune response.(a) With reference to Fig. 3.1,(i) name t...

2009 Winter

Theory

CH9 - GAS EXCHANGE AND SMOKING

(a) Calculate the actual diameter of the alveolus along the line X–Y.Show your working and give your answer to the nearest micrometre.Answer = ........

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