Biol345 Nucleus & Mitochondrion

Which statement is true?

1. The nucleus has only an outer membrane.

2. The mitochondrion has only an inner membrane.

3. The outer nuclear membrane has openings while the outer mitochondrial membrane does not.

4. The nucleus and mitochondrion both contain outer and inner membranes.

5. The outer mitochondrial membrane has openings while the outer nuclear membrane does not.

• 1

• 2

• 3

• 4

• 5

The nuclear pore complex is made up of 30 different proteins called _________.

Import of substances ≥ 9 nm occurs through ___________ transport in the nucleus.

GEF (Guanine nucleotide exchange factors) are responsible for:

• translocating RNA and proteins through the nuclear pore complex

• recognizing NLSs on cargo proteins

• activating GTPases by stimulating release of GDP to allow binding of GTP

• recognizing NESs on cargo proteins

• oxidizing glucose to pyruvate

RAN is not always required for substance export from a nucleus.

• True

• False

In a mitochondrion, ATP synthase is embedded in the __________.

The matrix is found on the inside of the ________ membrane in a mitochondrion?

• inner

• outer

Choose the false statement relating to ATP synthesis in a mitochondrion.

• The maximum ATP yield of aerobic respiration is 38 ATP molecules per molecule of glucose.

• Electron transport amongst the respiratory complexes causes protons to be pumped across the inner membrane.

• Glycolysis occurs outside the mitochondrion.

• Pyruvate oxidation occurs outside the mitochondrion.

• The citric acid cycles releases carbon dioxide.

Cytochrome c oxidase translocates _____ protons.

More mitochondria are found in ________ cells.