Membrane Transport/ Photosynthesis Quiz

Photosynthesis occurs in:

• Mitochondria

• Chloroplasts

• Humans

• Animals

Answer explanation

Photosynthesis occurs in chloroplasts, which are specialized organelles found in plant cells. Mitochondria are involved in respiration, while humans and animals do not perform photosynthesis.

Tags

NGSS.MS-LS1-6

What are the reactants in Photosynthesis?

• Sun, CO2, glucose

• glucose and oxygen

• sun, carbon dioxide, water

• water, glucose

Answer explanation

The correct reactants in photosynthesis are sunlight, carbon dioxide (CO2), and water. These are essential for the process, while glucose and oxygen are products, not reactants.

Tags

NGSS.MS-LS1-6

The process in which plant cells make energy

• Exothermic

• Endothermic

• Cellular Respiration

• Photosynthesis

Answer explanation

Photosynthesis is the process by which plant cells convert sunlight into energy, using carbon dioxide and water. This process is essential for plants to produce glucose and oxygen, making it the correct answer.

Tags

NGSS.MS-LS1-6

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Mitochondria and Chloroplasts are:

• organelles

• cells

• only in humans

• only in plants

Answer explanation

Mitochondria and chloroplasts are organelles found in cells. They are essential for energy production and photosynthesis, respectively, and are present in both plant and animal cells, not limited to humans or plants.

Tags

NGSS.MS-LS1-2

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For photosynthesis, a plant needs water, sun, and...

• oxygen

• carbon dioxide

• glucose

• mitochondria

Answer explanation

For photosynthesis, plants require carbon dioxide, along with water and sunlight, to produce glucose and oxygen. Therefore, the correct answer is carbon dioxide.

Tags

NGSS.MS-LS1-6

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What pigment absorbs sunlight for photosynthesis?

• chloroplast

• thylakoid

• grana

• chlorophyll

Answer explanation

Chlorophyll is the pigment in plants that absorbs sunlight for photosynthesis. It captures light energy, which is essential for converting carbon dioxide and water into glucose and oxygen.

How does carbon dioxide get into the leaves of a plant?

• It's absorbed by the roots

• It's made in a chemical reaction in the stem

• It enters through the stomata

• It goes through the flowers

Answer explanation

Carbon dioxide enters the leaves of a plant through small openings called stomata. These pores allow gas exchange, enabling the plant to take in CO2 for photosynthesis, making this the correct answer.

The stacks of disks in the chloroplast are called:

• Lamellae

• Grana

• Stroma

• Thylakoid

Answer explanation

The stacks of disks in the chloroplast are called grana. Each granum (singular of grana) consists of thylakoids, which are the sites of photosynthesis, making grana essential for the chloroplast's function.

Tags

NGSS.MS-LS1-2

What are the two products of the light reactions that are needed for the calvin cycle?

• NAD and NADPH

• NADP + and Glucose

• NADPH and ATP

• Oxygen and NADPH

Answer explanation

The Calvin cycle requires energy and reducing power, which are provided by ATP and NADPH produced during the light reactions of photosynthesis. Thus, the correct answer is NADPH and ATP.

Tags

NGSS.MS-LS1-6

After photosynthesis, plants store their energy as _________ .

• chlorophyll

• pigment

• glucose (sugar)

• Oxygen

Answer explanation

After photosynthesis, plants convert sunlight into chemical energy, storing it primarily as glucose (sugar). This sugar serves as a vital energy source for growth and metabolism.

Tags

NGSS.MS-LS1-6