Year 7 Test - Photosynthesis | Attempts: 2062

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Questions: 10 | Attempts: 2,062 | Updated: Oct 4, 2024

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Basically, plants and similar organisms use photosynthesis to convert light energy into chemical energy; this energy can then undergo energy transformation and be released to fuel the organisms' activities.

Questions and Answers

1.

What is the biological conversion of one or more carbon-containing molecules and nutrients into organic matter using the oxidation of inorganic compounds or methane as a source of energy?
- A.
  
  Chemosynthesis
- B.
  
  Transpiration
- C.
  
  Photosynthesis
- D.
  
  Gutation
Correct Answer
C. pHotosynthesis

Explanation
Photosynthesis is the correct answer because it is the biological process by which carbon-containing molecules and nutrients are converted into organic matter using the energy from sunlight. During photosynthesis, plants and some other organisms use the energy from sunlight to convert carbon dioxide and water into glucose and oxygen. This process is essential for the production of oxygen and the conversion of sunlight into chemical energy, which is then used by organisms for various metabolic processes.

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2
0
2.

Which of the following is a necessary condition for photosynthesis?
- A.
  
  Sunlight
- B.
  
  Nitrogen
- C.
  
  Oxygen
- D.
  
  Sulphur
Correct Answer
A. Sunlight

Explanation
Sunlight is a necessary condition for photosynthesis because it provides the energy needed for the process to occur. During photosynthesis, plants use sunlight to convert carbon dioxide and water into glucose and oxygen. This process is facilitated by a pigment called chlorophyll, which absorbs sunlight and uses its energy to power the chemical reactions of photosynthesis. Without sunlight, plants would not be able to produce the necessary energy to carry out photosynthesis, resulting in a lack of glucose production and oxygen release.

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3.

What is responsible for the green color of plants?
- A.
  
  Bacteria
- B.
  
  Fungi
- C.
  
  Nostok
- D.
  
  Chlorophyll
Correct Answer
D. ChloropHyll

Explanation
Chlorophyll is responsible for the green color of plants. It is a pigment found in the chloroplasts of plant cells and is essential for photosynthesis. Chlorophyll absorbs light energy from the sun and uses it to convert carbon dioxide and water into glucose and oxygen. It reflects green light, giving plants their characteristic green color. Bacteria, fungi, and Nostok are not responsible for the green color of plants.

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4.

The process of photosynthesis is divided into _____ stage(s)?
- A.
  
  1
- B.
  
  2
- C.
  
  3
- D.
  
  4
Correct Answer
B. 2

Explanation
The process of photosynthesis is divided into two stages: the light-dependent reactions and the light-independent reactions (also known as the Calvin cycle). In the light-dependent reactions, light energy is absorbed by chlorophyll and converted into chemical energy in the form of ATP and NADPH. These energy carriers are then used in the light-independent reactions to convert carbon dioxide into glucose through a series of biochemical reactions. Therefore, the correct answer is 2.

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5.

The photolysis of water occur during the...
- A.
  
  Light stage
- B.
  
  Dark stage
- C.
  
  Kreb cycle
- D.
  
  Carbon cycle
Correct Answer
A. Light stage

Explanation
The correct answer is Light stage because during the light stage of photosynthesis, water molecules are split into hydrogen ions, electrons, and oxygen atoms through a process called photolysis. This occurs in the thylakoid membranes of the chloroplasts, where light energy is absorbed by chlorophyll and used to drive the reaction. The oxygen released during photolysis is a byproduct and is essential for the survival of many organisms on Earth.

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6.

What is the end product of photosynthesis?
- A.
  
  Water
- B.
  
  Glucose
- C.
  
  CO2
- D.
  
  O2
Correct Answer
B. Glucose

Explanation
The end product of photosynthesis is glucose. During photosynthesis, plants use sunlight, water, and carbon dioxide to produce glucose and oxygen. Glucose is a type of sugar that serves as the main source of energy for plants. It is stored in the plant's cells and used for various metabolic processes, including growth and reproduction. Oxygen, on the other hand, is released into the atmosphere as a byproduct of photosynthesis.

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1
7.

Chlorophyll is responsible for trapping...
- A.
  
  Carbondioxide
- B.
  
  Oxygen
- C.
  
  Water
- D.
  
  Sunlight energy
Correct Answer
D. Sunlight energy

Explanation
Chlorophyll is a pigment found in plants that plays a crucial role in photosynthesis. It absorbs sunlight energy and converts it into chemical energy, which is then used to fuel the process of photosynthesis. Through photosynthesis, plants are able to convert carbon dioxide and water into glucose and oxygen. Therefore, chlorophyll is responsible for trapping sunlight energy, not carbon dioxide, oxygen, or water.

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8.

During photosynthesis, plants take in...
- A.
  
  Oxygen
- B.
  
  CO2
- C.
  
  H2O
- D.
  
  H2
Correct Answer
B. CO2

Explanation
During photosynthesis, plants take in carbon dioxide (CO2) from the atmosphere. This is a crucial step in the process as plants use CO2 along with sunlight and water to produce glucose and oxygen. The chlorophyll in plant cells captures the energy from sunlight, which is then used to convert CO2 and water into glucose. Oxygen is released as a byproduct of this process. Therefore, CO2 is an essential component for plants to carry out photosynthesis and produce energy.

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9.

What is the waste product of photosynthesis?
- A.
  
  Water and oxygen
- B.
  
  Carbon IV oxide and water
- C.
  
  Energy and water
- D.
  
  All of the above
Correct Answer
A. Water and oxygen

Explanation
The waste product of photosynthesis is water and oxygen. During photosynthesis, plants use sunlight, carbon dioxide, and water to produce glucose (energy) and oxygen. The oxygen is released into the atmosphere as a waste product, while the glucose is used by the plant for energy. Therefore, water and oxygen are the correct answer as they are the waste products produced during photosynthesis.

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10.

Which of the following organism can undergo photosynthesis?
- A.
  
  Amoeba
- B.
  
  Plasmodium
- C.
  
  Muchroom
- D.
  
  Euglena
Correct Answer
D. Euglena

Explanation
Euglena is capable of undergoing photosynthesis. It is a single-celled organism that possesses chloroplasts, which are responsible for capturing sunlight and converting it into energy through the process of photosynthesis. This allows Euglena to produce its own food using sunlight, carbon dioxide, and water. Unlike the other organisms listed, such as Amoeba, Plasmodium, and Mushroom, which are unable to perform photosynthesis, Euglena has the ability to harness energy from the sun and sustain itself.

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