WorksheetsHigher Biology unit 2 metabolic pathways
Total questions: 15
Worksheet time: 9mins
What is the name of the molecules the cell uses to directly control metabolic pathways
products
enzymes
substrates
___ reactions build up complex molecules from simple ones and ___ energy
(a)
___ reactions break down complex molecules into simple ones and ___ energy
(a)
When the enzyme binds to the substrate, what happens to the activation energy of the reaction?
The activation energy is decreased
The activation energy is increased
The activation energy stays the same
The activation energy increases then levels off
Name the type of inhibition that occurs when an inhibitor molecule binds to the active site of the enzyme and stops the substrate from binding?
competitive inhibition
non-competitive inhibition
Feedback inhibition
negative feedback loop
What is the type of inhibition that occurs when an inhibitor binds to a different part of the enzyme and changes the active site shape?
Competitive inhibition
Non-competitive inhibition
Feedback inhibition
negative feedback loop
Which coloured line indicates the reaction rate of a non-competitive inhibitor?
purple
orange
green
Which coloured line indicates the reaction rate of a competitive inhibitor?
purple
orange
green
What term describes an end product in a metabolic pathway binding to an enzyme at the start of a metabolic pathway in order to stop the process?
competitive inhibition
feedback inhibition
saturation point
non competitive inhibition
The diagram shows the citric acid cycle. Compound Y is what?
pyruvate
Oxaloacetate
citrate
glucose
The diagram shows the citric acid cycle. Compound X is what?
pyruvate
Oxaloacetate
citrate
glucose
Which enzyme removes electrons and H+ ions during glycolysis and the citric acid cycle?
ATP synthase
Dehydrogenase
Ligase
DNA polymerase
where does the citric acid cycle occur?
cytoplasm
matrix of the mitochondria
inner mitochondrial membrane (cristae)
nucleus
where does the electron transport chain occur?
cytoplasm
matrix of the mitochondria
inner mitochondrial membrane (cristae)
nucleus
which animal group does the heart shown belong to
bird
amphibian
mammal
fish
