Unit 2: Mitochondria

Question 1

___________ is independent of the endomembrane system in eukaryotic cells

Answer 1

chloroplast

Question 2

Disruption of the function of ________ would result in a dramatic decrease in ATP synthesis in eukaryotic cells

Answer 2

mitochondrium

Question 3

An organelle in a newly discovered cell contains thylakoids, DNA, and ribosomes. These findings suggest that this organelle is most likely similar to ______

Answer 3

chloroplasts

Question 4

If plant cells are grown on media containing radioactively labeled thymine for one generation, radioactively labeled macromolecules will be detected in _______________

Answer 4

nucleus, mitochondria, and chloroplasts

Question 5

Peroxisomes in liver cells detoxify alcohol by removing hydrogen atoms and combining them with ____________

Answer 5

oxygen molecules to generate hydrogen peroxide

Question 6

An early step in the evolution of eukaryotic cells most likely involved

Answer 6

endosymbiosis of an oxygen-using bacterium in a larger bacterial host cell (the endosymbiont evolved into mitochondria)

Question 7

While abundant quantities of proteins are produced by free ribosomes in the cytosol, new proteins are also produced by _________

Answer 7

mitochondria

Question 8

A particular cell contains the following molecules and structures: enzymes, DNA, ribosomes, plasma membrane, and mitochondria. Based on this composition, it could be a cell from which organisms?

Answer 8

eukaryotic

Question 9

Cyanide binds with at least one protein complex involved in producing ATP. If a cell is exposed to cyanide, most of the bound cyanide is likely to be localized within _________

Answer 9

mitochondria

Question 10

A young child who suffers from a metabolic disease is always tired and fatigued. Which organelle is most likely malfunctioning in this disease?

Answer 10

mitochondria