LongeCity - How much do you know about mitochondria?

Quiz tests knowledge of basic mitochondrial biology and genetics

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Mitochondria are NOT found in which of the following cell types?
Neurons
Osteocytes
Erythrocytes
Myocytes
Mitochondria are found in all cell types

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Oxidative phosphorylation occurs
in the cytoplasm
in the outer mitochondrial membrane
in the intermembrane space
in the mitochondrial inner membrane
in the matrix space

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All of the following organisms have mitochondria EXCEPT
Paramecium (protist)
Euglena (unicellular algae)
S. cerevisiae (yeast)
E. coli (gram-negative bacteria)
All of these have mitochondria
None of these have mitochondria

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If a child's father has a homoplasmic mitochondrial mutation, the chance that a child inherits that mutation is
100%
50%
25%
Effectively 0%
50% for daughters and 100% for sons

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If a child's mother has a homoplasmic mitochondrial mutation, the chance that a child inherits that mutation is
100%
50%
25%
Effectively 0%
50% for daughters and 100% for sons

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In a person with a heteroplasmic mitochondrial mutation
Every cell will contain mitochondria with the mutation in all mtDNA copies
Every cell will contain mitochondria with at least one mtDNA copy carrying the mutation
Only some cells will have mitochondria carrying the mtDNA mutation, but all mtDNA copies in those cells will be affected
Only some cells will have mitochondria carrying the mtDNA mutation, and only some mtDNA copies in those cells will be affected

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Which of the following processes does NOT occur in mitochondria?
Translation of mtDNA
Glycolysis
The Citric Acid Cycle
Oxidative Phosphorylation
Steroid Synthesis

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Mitochondrial DNA (mtDNA) encodes how many proteins?
8
13
15
24
37

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The purpose of oxidative phosphorylation is to
Phosphorylate metabolic intermediates
Generate ATP for energy
Produce oxygen
Remove damaging waste products like reactive oxygen species
Conduct electricity

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Which of the following organisms does not rely on mitochondria for energy production?
Mushroom
Algae
Palm Tree
Lab mouse
All of the above have mitochondria
None of the above have mitochondria

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Are mitochondrial mutations inherited or acquired?
Mitochondrial mutations can be inherited from either parent
Mitochondrial mutations are only inherited, and can only be passed down from one's father
Mitochondrial mutations are only inherited, and are only passed from the mother
Mitochondrial mutations only arise in adults and result from exposure to chemicals and radiation
Mitochondrial mutations are only acquired naturally as a result of ageing and metabolic processes
Mitochondrial mutations can be acquired or inherited

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