Chloroplasts and Photosynthesis Organelles

What is the green pigment in chloroplasts that captures light energy for photosynthesis?

1 pts

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Chloroplasts are the organelles responsible for photosynthesis in plant cells. They contain a specific green pigment that absorbs light energy.

What is this pigment called?

melanin

xanthophyll

chlorophyll

carotene

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Correct Answer

Explanation

In addition to chlorophyll, chloroplasts also contain ______, which are yellow and orange accessory pigments.

1 pts

Chloroplasts contain more than one type of pigment. Besides chlorophyll, they also contain accessory pigments that assist in capturing light.

In addition to chlorophyll, chloroplasts also contain (1), which are yellow and orange accessory pigments.

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phycobilins

carotenoids

melanins

anthocyanins

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Explanation

Match each internal chloroplast structure to its correct description.

1 pts

Chloroplasts have a complex internal membrane system. Match each structure to its correct description.

To complete the line match

Click on an item in the first group
Click on the match in the second group

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Structure

Grana

Grana lamellae

Stroma

Stroma lamellae

Description

Membranes connecting different grana stacks

Membranes within the grana stacks

Stacks of disc-like membranous sacs (thylakoids)

Proteinaceous matrix surrounding the internal membranes

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Explanation

Provide the definition

1 pts

Inside the chloroplast, surrounding all the internal membrane structures, is a protein-rich fluid.

This fluid matrix is called the (1).

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nucleoplasm

cytosol

stroma

matrix

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Explanation

What are the stacks of disc-like membranous sacs inside a chloroplast called?

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Inside the chloroplast, the internal membrane system is organized into distinct stacked structures where the light-capturing reactions take place.

What are these stacks called?

stroma

cristae

lamellae

grana

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Explanation

Classify each plastid type by the pigment or content it contains.

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Plastids are a family of plant cell organelles. Drag each plastid type into the correct category based on its contents.

Drag and drop each option into the correct category. Click ✕ to return an item to the pool.

Options Pool

Contains chlorophyll (green)

Drop here

Contains carotenoids (yellow/orange/red)

Drop here

Colorless / stores starch

Drop here

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Explanation

How do chloroplasts and mitochondria compare in terms of size?

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Both chloroplasts and mitochondria are major organelles found in plant cells. How do they compare in size?

Chloroplasts are smaller than mitochondria

Chloroplasts are larger than mitochondria

Mitochondria are always larger than any other organelle

They are always identical in size

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Explanation

Sort the steps of photosynthesis in the correct sequence.

1 pts

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Photosynthesis occurs in two main stages inside the chloroplast. Arrange the following steps in the correct sequence.

Light energy is absorbed by chlorophyll in the grana

Light reactions produce energy-carrying molecules (ATP and NADPH)

Carbon dioxide enters the stroma

Carbon fixation reactions (Calvin cycle) use ATP and NADPH to build sugars

Glucose is produced and oxygen is released

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Explanation

Select ALL correct statements about chloroplasts.

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Select ALL statements that are correct about chloroplasts.

They are found in plant cells and other photosynthetic organisms

They contain chlorophyll and carotenoids

They are found in animal cells

They are generally larger than mitochondria

Their internal membranes are organized into grana and lamellae

The stroma is the site of the light reactions

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Explanation

Fill in the blanks about the internal structure of a chloroplast.

1 pts

Complete the following description of chloroplast internal structure:

Inside the chloroplast, stacks of disc-like sacs called (1) are embedded in a protein-rich fluid called the (2). The membranes within the stacks are called (3), while the membranes connecting different stacks are called (4).

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grana

grana lamellae

stroma

stroma lamellae

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What is the green pigment in chloroplasts that captures light energy for photosynthesis?

Correct Answer

Explanation

In addition to chlorophyll, chloroplasts also contain ______, which are yellow and orange accessory pigments.

Correct Answer

Explanation

Match each internal chloroplast structure to its correct description.

Structure

Description

Correct Answer

Explanation

Provide the definition

Correct Answer

Explanation

What are the stacks of disc-like membranous sacs inside a chloroplast called?

Correct Answer

Explanation

Classify each plastid type by the pigment or content it contains.

Drag and drop each option into the correct category. Click ✕ to return an item to the pool.

Correct Answer

Explanation

How do chloroplasts and mitochondria compare in terms of size?

Correct Answer

Explanation

Sort the steps of photosynthesis in the correct sequence.

Correct Answer

Explanation

Select ALL correct statements about chloroplasts.

Correct Answer

Explanation

Fill in the blanks about the internal structure of a chloroplast.

Correct Answer

Explanation

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