Respiratory Substrates (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
Which cells rely exclusively on glucose as their respiratory substrate?
Which cells rely exclusively on glucose as their respiratory substrate?
Brain cells and red blood cells
What is the energy content of triglycerides per gram?
What is the energy content of triglycerides per gram?
39 kJ g⁻¹
Why do triglycerides produce more ATP than carbohydrates?
Why do triglycerides produce more ATP than carbohydrates?
They have more H atoms and fewer O atoms
What percentage of energy from glucose metabolism is lost as heat?
What percentage of energy from glucose metabolism is lost as heat?
68%
What are the products when triglycerides are hydrolysed?
What are the products when triglycerides are hydrolysed?
Fatty acids and glycerol
Where does the β-oxidation pathway occur?
Where does the β-oxidation pathway occur?
Mitochondrial matrix
How many acetyl groups are formed from a 16-carbon fatty acid?
How many acetyl groups are formed from a 16-carbon fatty acid?
8
When are proteins normally used as respiratory substrates?
When are proteins normally used as respiratory substrates?
During starvation or prolonged exercise
What is the respiratory quotient (RQ) value for glucose?
What is the respiratory quotient (RQ) value for glucose?
1.0
If RQ is greater than 1, what type of respiration is occurring?
If RQ is greater than 1, what type of respiration is occurring?
Mix of aerobic and anaerobic