GCSE Biology 4

Question 1

Which structure in the kidney is responsible for the filtration of blood?

Accepted Answer

Glomerulus

Answer

The glomerulus is a network of capillaries in the Bowman's capsule where high pressure forces small molecules out of the blood in ultrafiltration.

Question 2

What is the purpose of the acrosome in a sperm cell?

Accepted Answer

To release enzymes that digest the egg's outer layer

Answer

The acrosome at the sperm head's tip contains hydrolytic enzymes that digest the zona pellucida of the egg, enabling fertilisation.

Question 3

Which gas is produced as a waste product of anaerobic respiration in yeast?

Accepted Answer

Carbon dioxide

Answer

During anaerobic respiration (fermentation), yeast converts glucose into ethanol and carbon dioxide in the absence of oxygen.

Question 4

What does the term 'biodiversity' refer to?

Accepted Answer

The variety of different species and genetic variation within an ecosystem

Answer

Biodiversity encompasses the variety of species (species diversity) and genetic variation within species in a given area or ecosystem.

Question 5

Which hormone is produced by the pancreas to lower blood glucose concentration?

Accepted Answer

Insulin

Answer

Insulin is released by beta cells in the islets of Langerhans when blood glucose rises, stimulating cells to absorb glucose and converting it to glycogen.

GCSE - General Certificate of Secondary Education Practice Test

GCSE - General Certificate of Secondary Education Practice Test

GCSE Biology 4