Mitochondria (OCR A-Level Biology A): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What is the typical length range of mitochondria?
What is the typical length range of mitochondria?
2-5 μm
Why do mammalian red blood cells lack mitochondria entirely?
Why do mammalian red blood cells lack mitochondria entirely?
They rely solely on anaerobic respiration
Which cells contain substantially more mitochondria due to high metabolic demand?
Which cells contain substantially more mitochondria due to high metabolic demand?
Liver hepatocytes and muscle fibres
What is the primary function of cristae in mitochondria?
What is the primary function of cristae in mitochondria?
Increase surface area for ATP synthase
How does the pH of the intermembrane space compare to the matrix?
How does the pH of the intermembrane space compare to the matrix?
Lower pH due to higher H+ concentration
Which components are found within the mitochondrial matrix?
Which components are found within the mitochondrial matrix?
Circular DNA, 70S ribosomes, and enzymes
How many proteins does mitochondrial DNA code for?
How many proteins does mitochondrial DNA code for?
13 proteins
Which feature of mitochondria supports the endosymbiosis theory?
Which feature of mitochondria supports the endosymbiosis theory?
Circular DNA loop like bacteria
What substance cannot pass through the outer mitochondrial membrane?
What substance cannot pass through the outer mitochondrial membrane?
Glucose
What mitochondrial adaptation occurs in trained athletes?
What mitochondrial adaptation occurs in trained athletes?
More mitochondria and increased cristae