Mitochondria and Energy Production

What is the common nickname for mitochondria?

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Mitochondria are well known for their critical role in supplying energy to the cell.

What is the common nickname given to mitochondria because of this role?

The skeleton of the cell

The powerhouse of the cell

The factory of the cell

The brain of the cell

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Complete the sentence:

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Mitochondria supply the cell with chemical energy in the form of (1), the high-energy molecule (2).

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ATP

ADP

glucose

adenosine triphosphate

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Mitochondria are double-membraned. What does the outer membrane do?

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The mitochondrion has two membranes - an outer membrane and an inner membrane - each with a distinct role.

What is the function of the outer membrane of the mitochondrion?

Separates the mitochondria from the cytoplasm

Produces fat droplets

Manufactures ATP directly

Contains the cristae folds

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Complete the sentence:

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The inner membrane of the mitochondrion is highly folded to increase the surface area available for energy-transfer reactions.

These folds are called (1), and they extend into a semifluid (2).

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matrix

stroma

grana

cristae

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Where exactly in the mitochondrion are the energy-transfer enzyme systems found?

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ATP synthesis depends on specialized enzyme systems located within specific parts of the mitochondrion.

Select ALL locations where energy-transfer enzyme systems are found.

Along the cristae

In the matrix

On the outer membrane

In the nucleolus

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In which types of cells are mitochondria most abundant, and why?

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Because mitochondria produce energy, their abundance within a cell is related to that cell's energy demands.

In which types of cells are mitochondria most abundant?

Cells with high energy requirements, such as muscle cells and root tip cells

Cells with low energy requirements, such as skin cells

Cells that do not divide

Cells without a nucleus

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How many mitochondria can a single liver cell contain?

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Liver cells are metabolically very active and have exceptionally high energy demands.

Approximately how many mitochondria can a single liver cell contain?

25,000

250,000

2,500

250

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What happens to fat droplets found next to mitochondria when an energy deficit arises?

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Mitochondria interact with nearby fat droplets during periods of varying energy availability.

What happens when a cell faces an energy deficit?

Fat droplets are transferred to the nucleus

Fat droplets are expelled from the cell

Mitochondria break down the fat droplets to yield energy

Fat droplets produce ATP directly

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Explanation

Select ALL correct statements about mitochondria.

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Select ALL statements that are correct about mitochondria.

They produce ATP

Each liver cell can contain up to 2,500 mitochondria

Their inner membrane forms folds called cristae

They are found only in animal cells

They are double-membraned

They are often the largest organelles in the cytoplasm

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Explanation

Sort the steps of energy storage and release in mitochondria in the correct order.

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Arrange the following events in the correct sequence describing how mitochondria manage energy storage and release.

Fat droplets form next to mitochondria

Cell has excess sugar available

Energy is released and used for cellular activities

Mitochondria break down fat droplets

Energy deficit arises in the cell

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What is the common nickname for mitochondria?

Correct Answer

Explanation

Complete the sentence:

Correct Answer

Explanation

Mitochondria are double-membraned. What does the outer membrane do?

Correct Answer

Explanation

Complete the sentence:

Correct Answer

Explanation

Where exactly in the mitochondrion are the energy-transfer enzyme systems found?

Correct Answer

Explanation

In which types of cells are mitochondria most abundant, and why?

Correct Answer

Explanation

How many mitochondria can a single liver cell contain?

Correct Answer

Explanation

What happens to fat droplets found next to mitochondria when an energy deficit arises?

Correct Answer

Explanation

Select ALL correct statements about mitochondria.

Correct Answer

Explanation

Sort the steps of energy storage and release in mitochondria in the correct order.

Correct Answer

Explanation

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