Respiration- the Mitochondrion Flashcards

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1
Q

Describe the shape of a mitochondrion.

A

spherical, spiral

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2
Q

What are the dimensions of a mitochondrion?

A

Length 1.5-10 micrometres
Width 0.25-1.00 micrometres Diameter less than 1 micrometre

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3
Q

Describe the outer membrane.

A

The outer membrane is smooth and not folded, not very permeable to substances, however, it contains transport proteins which can shuttle pyruvate from the cytoplasm into the matrix.

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4
Q

Describe the inner membrane of the mitochondrion.

A

The inner membrane is highly folded to increase surface area for location of electron transport chains (respiratory chain), as well as ATP synthase, proton pumps.

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5
Q

Describe the intermembranal space of the mitochondrion.

A

The intermembranal space contains a high concentration of H+ for maintaining an electrochemical gradient between the matrix and the space.

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6
Q

Describe the matrix of the mitochondrion.

A

The matrix contains the enzymes and chemicals involved in the link reactions and Krebs’ Cycle reaction, for eg NAD, FAD (flavine adenine dinucleotide)

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7
Q

What are the structures of the mitochondria that must be labelled?

A

Matrix
Phosphate granule
Outer Membrane
Inner Membrane
Intermembranal Space
70 s Ribosome
Single Circular DNA

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