The diagram is a summary of part of a respiratory pathway in a cell - Scottish Highers Human Biology - Question 5 - 2019
Question 5
The diagram is a summary of part of a respiratory pathway in a cell.
(a) Give evidence from the diagram that confirms stage X is the energy pay-off phase.
(b) Stat... show full transcript
Worked Solution & Example Answer:The diagram is a summary of part of a respiratory pathway in a cell - Scottish Highers Human Biology - Question 5 - 2019
Step 1
Give evidence from the diagram that confirms stage X is the energy pay-off phase.
96%
114 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Stage X is confirmed as the energy pay-off phase because ATP is produced/released during this stage, indicating a gain of energy.
Step 2
State the function of dehydrogenase enzymes.
99%
104 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Dehydrogenase enzymes remove or release hydrogen ions (H⁺) or electrons, facilitating oxidation-reduction reactions in metabolic pathways.
Step 3
Name a hormone that is involved in pathway Y.
96%
101 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Glucagon is a hormone involved in pathway Y.
Step 4
Some individuals are unable to produce the enzyme glucose-6-phosphate dehydrogenase. Use information from the diagram to explain why this would reduce cell division in these individuals.
98%
120 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Without glucose-6-phosphate dehydrogenase, individuals cannot properly metabolize glucose, which is essential for producing nucleic acids and lipids. This limitation restricts the availability of nucleic acids necessary for DNA replication and protein synthesis, ultimately reducing cell division.
Join the Scottish Highers students using SimpleStudy...
