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

MCQ

CH1 - CELL STRUCTURE

Which of the cell organelles will be clearly visible under the high power (×400) of the light microscope? [Table_1]

2016 Summer

MCQ

CH1 - CELL STRUCTURE

The drawing from an electron micrograph shows a ciliated epithelial cell, magnified \times 1500, which is found in the trachea. Line X-Y shows the wid...

2016 Summer

MCQ

CH1 - CELL STRUCTURE

What are correct locations of ribosomes in the typical eukaryotic cell?1. free in the cytoplasm2. attached to the outside of the endoplasmic reticulum...

2016 Summer

MCQ

CH1 - CELL STRUCTURE

Visking tubing is an artificial partially permeable membrane used to demonstrate diffusion. Glucose molecules can pass through the pores in the membra...

2016 Summer

MCQ

CH1 - CELL STRUCTURE

What are found in both chloroplasts and typical prokaryotic cells?

2016 Summer

MCQ

CH2 - BIOLOGICAL MOLECULES

Two solutions, 1 and 2, one containing starch and sucrose, and the other containing glucose and protein, were tested with a variety of reagents to con...

2016 Summer

MCQ

CH2 - BIOLOGICAL MOLECULES

X and Y are two monomers found in biological polymers.[Image: Monomers X and Y]Which monomer is found in each of cellulose, glycogen, amylopectin and ...

2016 Summer

MCQ

CH2 - BIOLOGICAL MOLECULES

Chitin is a polysaccharide consisting of long straight chains of the monosaccharide acetylglucosamine, linked by 1,4 glycosidic bonds.Acetylglucosamin...

2016 Summer

MCQ

CH2 - BIOLOGICAL MOLECULES

Which statement about triglycerides is correct?

2016 Summer

MCQ

CH2 - BIOLOGICAL MOLECULES

The diagrams show the structures of two amino acids, one of which has two amine (–NH₂) groups and the other has two carboxylic (–COOH) groups. ...

2016 Summer