Free GCSE Biology Question and Answers

Question 1

Which of the following does not help a plant survive in dry conditions?

Accepted Answer

Large surface area

Answer

Plants in dry conditions need to conserve water to survive. A large surface area, particularly for leaves, would increase the rate of transpiration, leading to excessive water loss through evaporation. Adaptations like long roots, small surface areas (e.g., needle-like leaves), and waxy cuticles all help reduce water loss, making a large surface area detrimental in arid environments.

Question 2

The metabolic rate is the speed at which chemical reactions occurs in the

Accepted Answer

Cells

Answer

Metabolic rate refers to the speed at which all the chemical reactions necessary to maintain life occur within an organism. These fundamental chemical processes, such as respiration and synthesis, primarily take place inside the cells of the body. Therefore, the metabolic rate is a direct measure of cellular activity and energy expenditure.

Question 3

Where do viruses reside?

Accepted Answer

Host cells

Answer

Viruses are obligate intracellular parasites, meaning they cannot replicate or carry out metabolic processes independently. They must infect and take over the machinery of a living host cell to reproduce. Outside of a host cell, viruses are inert and cannot function, making host cells their essential residence for activity and survival.

Question 4

Who made strides in in the field of vaccinations?

Accepted Answer

Jenner

Answer

Edward Jenner is credited with pioneering the concept of vaccines in the late 18th century. He observed that exposure to cowpox protected individuals from the deadly smallpox virus. His groundbreaking work involved inoculating people with cowpox material to confer immunity, laying the foundation for modern vaccination practices.

Question 5

What does the phrase "pathogen" mean?

Accepted Answer

A disease causing organism

Answer

The term 'pathogen' refers specifically to any biological agent that causes disease or illness in its host. This includes various microorganisms such as bacteria, viruses, fungi, and parasites. It is the causative agent, not the disease itself, that is termed a pathogen.

GCSE - General Certificate of Secondary Education Practice Test

GCSE - General Certificate of Secondary Education Practice Test

Free GCSE Biology Question and Answers