Cilia, Flagella, and Centrioles

What is the arrangement of microtubules characteristic of all cellular cilia and flagella?

1 pts

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Cilia and flagella share a universal internal structure of microtubules, described by a specific numerical arrangement.

What is this arrangement called?

9 + 3

7 + 2

9 + 2

6 + 2

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Explanation

Which organisms are the exceptions to the 9 + 2 microtubule arrangement in cilia and flagella?

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The 9 + 2 arrangement is characteristic of virtually all cellular cilia and flagella - but two groups of organisms are exceptions.

Which organisms are these exceptions?

Bacteria and blue-green algae

Plants and animals

Viruses and prions

Fungi and protozoa

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Explanation

Centrioles nine sets

1 pts

Centrioles are cylindrical structures found near the nucleus in animal cells. They have a characteristic internal composition.

Centrioles are composed of nine sets of (1), all arranged lengthwise to create a (2) structure.

Please drag and drop the selected option in the right place or type it instead

doublets

cylindrical

spherical

triplets

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Explanation

What do centrioles organize during cell division?

1 pts

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During mitosis or meiosis, centrioles become active and play a key organizational role.

What structure do centrioles organize during cell division?

The endoplasmic reticulum

The cell wall

The nuclear envelope

The mitotic spindle

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Explanation

The star-shaped formations

1 pts

During the early stages of spindle formation in animal cells, microtubules radiate outward from each centriole in a star-like pattern.

These formations are called (1).

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asters

cristae

spindles

grana

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Explanation

Basal bodies and centrioles are structurally identical. How do they differ in location?

1 pts

Basal bodies and centrioles share the same internal structure - nine sets of microtubule triplets arranged in a cylindrical form. However, they are found in different locations.

Match each structure to its location.

To complete the line match

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

To delete a match, double click on a line

Structure

Basal bodies

Centrioles

Location

At the bases of cilia and flagella in all cells

Near the nucleus in animal cells only

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Explanation

Select ALL correct statements about centrioles.

1 pts

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Select ALL statements that are correct about centrioles.

They occur in pairs

They replicate during telophase so each daughter cell has its own

They are composed of nine sets of microtubule triplets

They are found in most higher plant cells

They form asters during early spindle formation

They are found only in animal cells

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Explanation

Sort the events of centriole activity during cell division in the correct sequence.

1 pts

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Arrange the following events involving centrioles during cell division in the correct order.

Both pairs of centrioles are located just outside the nucleus during interphase

Mitosis begins and centriole pairs move apart

The spindle forms and chromosomes align along it

Centrioles replicate during telophase so each daughter cell has a pair

Microtubules radiate around each centriole forming asters

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Explanation

Classify each structure as belonging to cilia/flagella movement or centriole/spindle function.

1 pts

Drag each term into the correct functional category.

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

Options Pool

Cilia / Flagella

Drop here

Centrioles / Spindle

Drop here

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Explanation

True or False: Most higher plants form asters during cell division.

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True or False:

Most higher plants form asters during cell division, just like animal cells do.

True

False

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What is the arrangement of microtubules characteristic of all cellular cilia and flagella?

Correct Answer

Explanation

Which organisms are the exceptions to the 9 + 2 microtubule arrangement in cilia and flagella?

Correct Answer

Explanation

Centrioles nine sets

Correct Answer

Explanation

What do centrioles organize during cell division?

Correct Answer

Explanation

The star-shaped formations

Correct Answer

Explanation

Basal bodies and centrioles are structurally identical. How do they differ in location?

Structure

Location

Correct Answer

Explanation

Select ALL correct statements about centrioles.

Correct Answer

Explanation

Sort the events of centriole activity during cell division in the correct sequence.

Correct Answer

Explanation

Classify each structure as belonging to cilia/flagella movement or centriole/spindle function.

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

Correct Answer

Explanation

True or False: Most higher plants form asters during cell division.

Correct Answer

Explanation

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