Une chem Study guides, Class notes & Summaries

AQA GCSE COMBINED SCIENCE TRILOGY Higher Tier Chemistry Paper 2H June 2023

AQA GCSE CHEMISTRY 8462/1H Paper 1 Higher Tier Mark scheme June 2023 Version: 1.0 Final

AQA GCSE COMBINED SCIENCE: TRILOGY 8464/C/1H Chemistry Paper 1H Mark scheme June 2023 Version: 1.0 Final AQA GCSE COMBINED SCIENCE: TRILOGY 8464/C/1H Chemistry Paper 1H Mark scheme June 2023 Version: 1.0 Final

This is the final mark scheme

In the fasted state, fatty acyl-CoAs are transported across the mitochondrial membrane. The transport of fatty acids via carnitine palmitoyl transferase 1 can be directly inhibited by which of the following compounds? correct answer: Malonyl-CoA An individual is on a hunger strike and has not eaten in 13 days. Which of the following best describes their metabolic state? correct answer: The brain will be preferentially oxidizing ketones. Ketonuria, hyperglycemia and severe acidosis are pr...

An enzyme has a mutation within the substrate-binding site that reduces the binding of the coenzyme needed for covalent catalysis. Which of the following is likely to result as a consequence of this mutation? a. the enzyme will use and alternative coenzyme for the reaction b. the enzyme will not be able to bind to the substrate c. The enzyme will not be able to form the transition state complex d. The enzyme will function normally correct answer: c. The enzyme will not be able to form the t...

Control of Fatty Acid Synthesis vs. Oxidation correct answer: When Insulin is HIGH --> fatty acid synthesis occurs When Glucagon is HIGH --> lipolysis, fatty acid B-oxidation, ketogenesis occur **These never happen at the same time! Lipolysis correct answer: Process of releasing free fatty acids from triacylglycerols stored in the adipose IN THE FASTED STATE Steps of lipolysis correct answer: 1) Hormone Sensitive Lipase: activated by glucagon and epinephrine TAGs are hydroly...