Photo AI
The diagram represents glycolysis and the metabolic pathway which synthesises lactic acid - Scottish Highers Human Biology - Question 1 - 2018
Question 1
The diagram represents glycolysis and the metabolic pathway which synthesises lactic acid. a) (i) State where glycolysis occurs within a cell. _________________ (... show full transcript
Worked Solution & Example Answer:The diagram represents glycolysis and the metabolic pathway which synthesises lactic acid - Scottish Highers Human Biology - Question 1 - 2018
Step 1
Step 2
Describe what happens during the energy investment phase of glycolysis.
Answer
During the energy investment phase of glycolysis, two molecules of ATP are used to phosphorylate glucose and its intermediates. This process is essential for the conversion of glucose into fructose-1,6-bisphosphate, which is then split into two three-carbon molecules.
Step 4
Explain the importance of the regeneration of NAD for glycolysis.
Answer
The regeneration of NAD is crucial for glycolysis because it allows for the continuous production of ATP during anaerobic respiration. NAD accepts hydrogen ions during glycolysis, enabling the processes to continue in the absence of oxygen.
Step 5
State the reason why muscle cells produce lactic acid during vigorous exercise.
Answer
Muscle cells produce lactic acid during vigorous exercise due to insufficient oxygen or a lack of oxygen availability. This leads to anaerobic respiration, where glucose is metabolized into lactic acid, allowing energy production to continue.