All you need to know to get an A* for IGCSE Biology!

Which of the following is a symptom of scurvy?

• Not enough platelets in your blood, causing blood clotting difficulties, easy to bleed severely.

• Bleeding under the skin, poor wound healing, hair loss, tooth loss.

• Muscle, bone, or joint pain; sluggish metabolism, low energy levels and fatigue.

• Muscle cramp, bone pain, weakness and tingling, pale skin.

Which process gets rid of the carbon dioxide in the air?

• Respiration

• Combustion

• Condensation

• Exhalation

• Photosynthesis

Which cell has no DNA?

• Sperm Cell

• Spongy Mesophyll Cell

• Red Blood Cell

• Goblet Cell

• White Blood Cell

The blockage of which of the following causes heart attack?

• Aorta

• Pulmonary artery

• Semi-lunar valve

• Coronary artery

• Atrioventricular Valve

The diagram shows a mesophyll cell.

Which is the cell's DNA found?

• A

• D

• C

• B

Which of the following is the correct definition of adhesion?

• The tendency of dissimilar particles orsurfaces to cling to one another

• The tendency of similar or identical particles/surfaces to clingto one another

• two molecules or moieties (functional groups) combine to form a larger molecule, together with the loss of a small molecule.

• a substance reacts with oxygen and releases a huge amount of energy in the form of light and heat.

• the process by which green plants and some other organisms use sunlight to synthesize foods from carbon dioxide and water.

Which of the following protein is essential as a channel protein in osmosis?

• Dystrophin

• Enzyme

• Aquaporin

• Coronin

• Keratin

Which of the following is the correct process of exhalation?

• the diaphragm and the muscles between the ribs contract and expand the chest cavity. When the chest cavity expands, the pressure in the chest is lowered to a level below that of the air pressure outside.

• the diaphragm and muscles between the ribs relax and make the chest cavity smaller. The decrease in the volume of the chest cavity increases the pressure to a level that is higher than the air pressure outside.

Which part is the xylem?

• The orange part

• The dark green part

• the red part

• the light green part

• the outer layer

Where is the spongy mesophyll?

• A

• C

• E

• D

• B