Understanding Photosynthesis

What is the overall equation for photosynthesis?

Answer explanation

The overall equation for photosynthesis shows that carbon dioxide (6CO2) and water (6H2O) combine using light energy to produce glucose (C6H12O6) and oxygen (6O2). Thus, the correct equation is 6CO2 + 6H2O + light energy -> C6H12O6 + 6O2.

What role does chlorophyll play in photosynthesis?

• Chlorophyll acts as a nutrient for plant growth.

• Chlorophyll absorbs light energy for photosynthesis.

• Chlorophyll converts carbon dioxide into glucose.

• Chlorophyll releases oxygen during photosynthesis.

Answer explanation

Chlorophyll is essential in photosynthesis as it absorbs light energy, which is then used to convert carbon dioxide and water into glucose and oxygen. This makes the choice "Chlorophyll absorbs light energy for photosynthesis" the correct answer.

What is the significance of carbon dioxide in photosynthesis?

• Carbon dioxide is essential for photosynthesis as it is converted into glucose, providing energy for plants.

• Carbon dioxide is converted into oxygen, which is essential for plant growth.

• Carbon dioxide is used to absorb sunlight during photosynthesis.

• Carbon dioxide is a waste product of photosynthesis.

Answer explanation

Carbon dioxide is crucial for photosynthesis as it is transformed into glucose, which serves as energy for plants. This process is fundamental for plant growth and sustains the food chain.

Why is photosynthesis important for life on Earth?

• Photosynthesis consumes oxygen and releases carbon dioxide.

• Photosynthesis is only important for plants and has no impact on animals.

• Photosynthesis occurs only at night when there is no sunlight.

• Photosynthesis is important because it produces oxygen and is the primary source of energy for life on Earth.

Answer explanation

Photosynthesis is crucial as it produces oxygen, which is essential for most life forms, and it serves as the primary energy source for ecosystems, supporting both plants and animals.

Which environmental conditions are essential for optimal photosynthesis?

• Temperature, light quality, humidity, and carbon dioxide levels.

• Soil pH

• Wind speed

• Oxygen concentration

Answer explanation

The rate of photosynthesis is limited by light intensity, carbon dioxide concentration, temperature, and water availability, as these factors directly affect the process. Soil quality, air pressure, and nutrient levels are not primary limiting factors.

How do plants capture light energy during photosynthesis?

Answer explanation

Plants capture light energy using chlorophyll, a pigment found in chloroplasts, which absorbs sunlight during photosynthesis. This process converts light energy into chemical energy, essential for plant growth.

What is the primary pigment involved in photosynthesis?

• Carotene

• Xanthophyll

• Chlorophyll a

• Chlorophyll b

In which part of the plant does photosynthesis primarily occur?

• Roots

• Stems

• Leaves

• Flowers

What is produced as a byproduct of photosynthesis?

• Carbon dioxide

• Glucose

• Oxygen

• Water

Which process occurs in the chloroplasts of plant cells?

• Cellular respiration

• Photosynthesis

• Transpiration

• Fermentation