Bioenergetics Practice Questions
GCSE · GCSE Biology · 143 free MCQs with instant results and detailed explanations.
143
Total
38
Easy
74
Medium
31
Hard
Start Practicing Bioenergetics
Take a timed quiz or customize your practice session
Sample Questions from Bioenergetics
Here are 10 sample questions. Start a quiz to get randomized questions with scoring.
Q1
Easy
What is the primary function of photosynthesis in plants?
A.
To produce glucose using sunlight
B.
To absorb oxygen from the atmosphere
C.
To convert glucose into starch
D.
To release carbon dioxide during respiration
Show Answer & Explanation
Correct Answer: A
Photosynthesis is the process by which plants use sunlight to convert carbon dioxide and water into glucose and oxygen. The primary function is to produce glucose, which serves as food for the plant.
Q2
Easy
During respiration, what is the main product of anaerobic respiration in yeast?
A.
Carbon dioxide and ethanol
B.
Oxygen and glucose
C.
Lactic acid and glucose
D.
Carbon dioxide and water
Show Answer & Explanation
Correct Answer: A
Anaerobic respiration in yeast produces carbon dioxide and ethanol as the main by-products, particularly during fermentation processes, which is crucial for baking and brewing industries.
Q3
Easy
What is the primary source of energy for photosynthesis in plants?
A.
Carbon Dioxide
B.
Water
C.
Sunlight
D.
Oxygen
Show Answer & Explanation
Correct Answer: C
The primary source of energy for photosynthesis is sunlight, which is absorbed by chlorophyll in plant leaves, enabling the conversion of carbon dioxide and water into glucose and oxygen.
Q4
Medium
What is the primary source of energy for photosynthesis?
A.
Carbon dioxide
B.
Water
C.
Sunlight
D.
Glucose
Show Answer & Explanation
Correct Answer: C
Sunlight is the primary energy source driving the process of photosynthesis in plants, allowing them to convert carbon dioxide and water into glucose and oxygen.
Q5
Medium
Which of the following processes releases energy in the absence of oxygen?
A.
Aerobic respiration
B.
Anaerobic respiration
C.
Photosynthesis
D.
Fermentation
Show Answer & Explanation
Correct Answer: B
Anaerobic respiration occurs in the absence of oxygen and allows cells to release energy, typically resulting in lactic acid or ethanol as byproducts.
Q6
Medium
What is the role of chlorophyll in photosynthesis?
A.
To absorb carbon dioxide
B.
To capture sunlight
C.
To release oxygen
D.
To convert glucose
Show Answer & Explanation
Correct Answer: B
Chlorophyll is the green pigment in plants that captures sunlight, which is essential for the process of photosynthesis to occur.
Q7
Medium
What is the product of anaerobic respiration in yeast?
A.
Carbon dioxide and ethanol
B.
Lactic acid
C.
Oxygen and glucose
D.
Water and energy
Show Answer & Explanation
Correct Answer: A
In yeast, anaerobic respiration produces carbon dioxide and ethanol, which are byproducts of fermentation.
Q8
Hard
In the process of photosynthesis, which of the following is a product of the light-dependent reactions?
A.
Glucose
B.
Oxygen
C.
Carbon Dioxide
D.
ATP
Show Answer & Explanation
Correct Answer: B
Oxygen is a product of the light-dependent reactions in photosynthesis, released when water is split during photolysis. Glucose and ATP are produced in the light-independent reactions.
Q9
Hard
Calculate the net gain of ATP molecules from one molecule of glucose during aerobic respiration. Which of the following is correct?
A.
2 ATP
B.
30 ATP
C.
38 ATP
D.
24 ATP
Show Answer & Explanation
Correct Answer: C
The net gain of ATP from one molecule of glucose during aerobic respiration is typically 38 ATP. This includes ATP produced from glycolysis, the Krebs cycle, and oxidative phosphorylation.
Q10
Hard
In the process of photosynthesis, which of the following gases is produced as a by-product in the light-dependent reactions?
A.
Oxygen
B.
Carbon Dioxide
C.
Nitrogen
D.
Hydrogen
Show Answer & Explanation
Correct Answer: A
Oxygen is produced as a by-product during the light-dependent reactions of photosynthesis when water molecules are split to provide electrons. This oxygen is released into the atmosphere.
Showing 10 of 143 questions. Start a quiz to practice all questions with scoring and timer.
Practice All 143 Questions →Other GCSE Subjects
Bioenergetics — GCSE GCSE Biology Practice Questions Online
This page contains 143 practice MCQs for the chapter Bioenergetics in GCSE GCSE Biology. The questions are organized by difficulty — 38 easy, 74 medium, 31 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.