3.2.5 Mitochondria: Welcome Guests

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1

The function of the mitochondria is

to convert energy into forms that are usable by the cell.

2

The inner membrane of the mitochondria are arranged into folds called

cristae.

3

Which of the following statements about mitochondrial structure is incorrect?

1. The mitochondrion contains two membranes.

2. The outer membrane is arranged into many folds in order to increase its surface area.

3. The membrane structure of the mitochondrion shows that it is not a part of the endomembrane system.

4. The surface area of the mitochondrial inner membrane is greater than the surface area of the outer membrane.

2. The outer membrane is arranged into many folds in order to increase its surface area.

4

According to the __________ theory, mitochondria and chloroplasts are thought to have evolved from prokaryotic cells entering eukaryotic cells.

endosymbiotic

5

True or False?

Mitochondria are found only in eukaryotic cells.

True

6

True or False

One of the key evidences in favor of the theory of the endosymbiotic origin of mitochondria is the cristae

False

One of the key evidences in favor of the theory of the endosymbiotic origin of mitochondria is the double membrane

7

The endosymbiont theory suggests that mitochondria and __________ arose from an ancestral prokaryote.

chloroplasts

8

The ____________ and the ______________ are two membranous organelles that are not part of the endomembrane system

chloroplasts and the mitochondria

9

A large body of structural and genetic evidence suggests that both organelles originated as independent prokaryotes and
were taken up by eukaryotic organisms as

endosymbionts

10

Termites that have endosymbiotic protozoans that house bacterial symbionts.The
bacteria can digest _____________, a staple of the termite diet.

cellulose