Organisation Practice Questions
GCSE · GCSE Biology · 143 free MCQs with instant results and detailed explanations.
143
Total
43
Easy
70
Medium
30
Hard
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Sample Questions from Organisation
Here are 10 sample questions. Start a quiz to get randomized questions with scoring.
Q1
Easy
Which of the following best describes the term 'tissue' in biological organization?
A.
A group of similar cells performing a specific function
B.
A single cell performing all functions of life
C.
An organ made of different tissues working together
D.
A collection of organs that perform a specific function
Show Answer & Explanation
Correct Answer: A
A tissue is defined as a group of similar cells that work together to perform a specific function, distinguishing it from a cell or an organ.
Q2
Easy
In which organ system does the heart belong?
A.
Digestive system
B.
Respiratory system
C.
Circulatory system
D.
Nervous system
Show Answer & Explanation
Correct Answer: C
The heart is a key component of the circulatory system, which is responsible for transporting blood throughout the body.
Q3
Easy
What is the primary function of red blood cells in the human body?
A.
To fight infections
B.
To transport oxygen
C.
To regulate body temperature
D.
To aid in digestion
Show Answer & Explanation
Correct Answer: B
Red blood cells primarily function to transport oxygen from the lungs to the body's tissues and return carbon dioxide to the lungs.
Q4
Medium
Which of the following best describes the function of the stomata in leaves?
A.
To allow gas exchange and regulate water loss.
B.
To absorb sunlight for photosynthesis.
C.
To transport nutrients throughout the plant.
D.
To anchor the plant in the soil.
Show Answer & Explanation
Correct Answer: A
Stomata are small openings on the surface of leaves that facilitate gas exchange (oxygen and carbon dioxide) and help in regulating water loss through transpiration. This makes option A the correct answer.
Q5
Medium
In the human digestive system, which enzyme is responsible for breaking down starch into sugars?
A.
Protease
B.
Lipase
C.
Amylase
D.
Cellulase
Show Answer & Explanation
Correct Answer: C
Amylase is the enzyme that catalyzes the breakdown of starch into simpler sugars, primarily in the mouth and small intestine. Thus, option C is correct.
Q6
Medium
Which structure in plant cells is primarily responsible for photosynthesis?
A.
Mitochondria
B.
Chloroplast
C.
Nucleus
D.
Cell wall
Show Answer & Explanation
Correct Answer: B
Chloroplasts contain chlorophyll and are the organelles where photosynthesis occurs in plant cells, converting light energy into chemical energy. Therefore, option B is the correct answer.
Q7
Medium
If a muscle cell requires a constant supply of energy, what cellular process primarily provides this energy?
A.
Fermentation
B.
Photosynthesis
C.
Aerobic respiration
D.
Anaerobic respiration
Show Answer & Explanation
Correct Answer: C
Aerobic respiration is the process that uses oxygen to convert glucose into energy, making it the main source of energy for muscle cells during prolonged activity. Thus, option C is correct.
Q8
Hard
Which of the following best describes the function of hemoglobin in red blood cells?
A.
Transporting oxygen from the lungs to the tissues and facilitating carbon dioxide transport back to the lungs.
B.
Regulating blood pressure by constricting blood vessels.
C.
Protecting the body against infections by producing antibodies.
D.
Clotting the blood to prevent excessive bleeding during injury.
Show Answer & Explanation
Correct Answer: A
Hemoglobin is a protein in red blood cells specifically designed to bind with oxygen in the lungs and transport it to tissues. It also helps in carrying carbon dioxide back to the lungs for exhalation, making option A the correct choice.
Q9
Hard
What is the primary purpose of the small intestine in the digestive system?
A.
To act as a barrier against pathogens entering the body.
B.
To absorb most nutrients and minerals from food.
C.
To store bile before it is released into the digestive tract.
D.
To mechanically break down food into smaller pieces.
Show Answer & Explanation
Correct Answer: B
The small intestine plays a crucial role in digestion by absorbing the majority of the nutrients and minerals from the food we eat, which makes option B the correct answer. Other options refer to functions of different organs in the digestive system.
Q10
Hard
Which of the following best describes the role of enzymes in metabolic pathways?
A.
Enzymes absorb heat from the environment to speed up reactions.
B.
Enzymes act as catalysts, lowering the activation energy required for reactions.
C.
Enzymes are consumed in the reactions they catalyze.
D.
Enzymes increase the concentration of products by altering the equilibrium of the reaction.
Show Answer & Explanation
Correct Answer: B
Enzymes function as catalysts by lowering the activation energy needed for metabolic reactions, allowing them to proceed faster without being consumed in the process.
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Organisation — GCSE GCSE Biology Practice Questions Online
This page contains 143 practice MCQs for the chapter Organisation in GCSE GCSE Biology. The questions are organized by difficulty — 43 easy, 70 medium, 30 hard — so you can choose the right level for your preparation.
Every question includes a detailed explanation to help you understand the concept, not just memorize answers. Take a timed quiz to simulate exam conditions, or practice at your own pace with no time limit.