Photosynthesis

Which of the following is an example of a HETEROTROPH?

• Grass

• Algae

• Lemon Tree

• Bear

Answer explanation

A heterotroph is an organism that cannot produce its own food and relies on consuming other organisms. Bears are heterotrophs as they eat plants and animals, while grass, algae, and lemon trees are autotrophs that produce their own food.

What is the correct equation for photosynthesis?

• C₆H₁₂O₆ + 6O₂ --> 6CO₂ + 6H₂O

• 6CO₂ + 6O₂ --> C₆H₁₂O₆  + 6H₂O

•  6CO₂ + 6O₂ --> 6H₂O + C₆H₁₂O₆

• 6CO₂ + 6H₂O  -->  6O₂ + C₆H₁₂O₆

Answer explanation

The correct equation for photosynthesis is 6CO₂ + 6H₂O → 6O₂ + C₆H₁₂O₆. This shows that carbon dioxide and water are converted into glucose and oxygen, which is the fundamental process of photosynthesis.

The cell organelle that is the site for photosynthesis is called:

• mitochondria

• nucleus

• cytoplasm

• chloroplast

Answer explanation

The chloroplast is the organelle responsible for photosynthesis, converting light energy into chemical energy in plants. Mitochondria are for respiration, the nucleus contains genetic material, and the cytoplasm is the fluid inside the cell.

Chlorophyll absorbs _____ and _______ light from the light.

• purple and green

• red and blue

• black and orange

• yellow and green

Answer explanation

Chlorophyll primarily absorbs red and blue light for photosynthesis, while reflecting green light, which is why plants appear green. Therefore, the correct answer is red and blue.

What do plants need for the photosynthesis process?

• a camera and tripod

• light, carbon dioxide, and water

• roots, flowers, and bees

• soil, air, and oxygen

Answer explanation

Plants need light, carbon dioxide, and water for photosynthesis. These elements are essential for converting sunlight into energy, allowing plants to produce glucose and oxygen, which are vital for their growth and survival.

During photosynthesis, the atoms in the water and carbon dioxide ________ to form oxygen and glucose.

• Change

• Multiply

• Rearrange

• Disappear

Answer explanation

During photosynthesis, the atoms in water and carbon dioxide rearrange to create glucose and oxygen. This process involves breaking and forming bonds, but the atoms themselves do not change or disappear.

Which organisms perform Photosynthesis?

• Only Autotrophs

• Only Heterotrophs

• Autotrophs and Heterotrophs

Answer explanation

Only autotrophs, such as plants and some bacteria, can perform photosynthesis, converting sunlight into energy. Heterotrophs, like animals, rely on consuming other organisms for energy.

What are the reactants of photosynthesis?

• carbon dioxide and oxygen

• water and oxygen

• carbon dioxide and water

• water and glucose

Answer explanation

The reactants of photosynthesis are carbon dioxide and water. During the process, plants use sunlight to convert these reactants into glucose and oxygen, making carbon dioxide and water the correct answer.

Which of the following go through the process of photosynthesis?

• bees

• algae

• humans

• mushrooms

Answer explanation

Algae are photosynthetic organisms that convert sunlight into energy, using chlorophyll. Unlike bees, humans, and mushrooms, which do not perform photosynthesis, algae play a crucial role in producing oxygen and organic matter.

What are the products of photosynthesis?

• water and carbon dioxide

• oxygen and glucose

• oxygen and carbon dioxide

• oxygen and water

Answer explanation

The products of photosynthesis are oxygen and glucose. During this process, plants convert carbon dioxide and water into glucose for energy, releasing oxygen as a byproduct.