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WorksheetsG12 BIOLOGY REVISION
Total questions: 20
Worksheet time: 26mins
A chemical reaction in which small molecules are built into larger ones.
metabolic
catabolic
anabolic
cathartic
The transfer of phosphate from a substrate molecule directly to ADP to produce ATP, using energy provided by another chemical reaction.
respiration
substrate-linked reaction
chemiosmosis
photosynthesis
The synthesis of ATP using energy released by moving hydrogen ions down their concentration gradient across a membrane in a mitochondrion or chloroplast.
respiration
substrate-linked reaction
chemiosmosis
photosynthesis
A cycle of aerobic respiration reactions in the mitochondrion matrix in which hydrogen passes to hydrogen carriers for subsequent ATP synthesis.
Calvin cycle
Krebs cycle
water cycle
nitrogen cycle
Reorder the following stages of glycolysis.
phosphorylation
lysis
oxidation
ATP Formation
Reorder the following stages of the link reaction.
Pyruvate is transported from the cytosol into the mitochondrial matrix by carrier proteins on the mitochondrial membrane
The pyruvate loses a carbon atom (decarboxylation), which forms a carbon dioxide molecule
The 2C compound then forms an acetyl group when it loses hydrogen atoms via oxidation (NAD+ is reduced to NADH + H+)
The acetyl compound then combines with coenzyme A to form acetyl coenzyme A (acetyl CoA)
Reorder the following stages of the Krebs cycle.
acetyl CoA transfers its acetyl group to a 4C compound (oxaloacetate) to make a 6C compound (citrate)
Two carbon atoms are released via decarboxylation to form two molecules of carbon dioxide (CO2)
Multiple oxidation reactions result in the reduction of hydrogen carriers (3 × NADH + H+ ; 1 × FADH2)
One molecule of ATP is produced directly via substrate level phosphorylation
Reorder the following stages of oxidative phosphorylation.
generating a proton motive force
ATP synthesis via chemiosmosis
reduction of oxygen
Match the following ATP made with the stages of respiration.
4
Glycolysis
2
Link Reaction
28
Krebs cycle
0
Oxidative phosphorylation
Match the following parts of the mitochondria with their function.
a part of the inner membrane that contains many folds that increase SA: vol ratio
outer membrane
site of Krebs cycle
inner membrane
small space between membranes that maximises hydrogen gradient
cristae
contains transport proteins that enable the shuffling of pyruvate from the cytosol
inter membrane space
contains the electron transport chain and ATP synthase
matrix
What is the respiratory quotient of carbihydrates?
1.0
0.7
0.9
0.6
Pyruvate is converted into (a) in anaerobic respiration in animals.
What do you call the coloured substances that absorb light of particular wavelengths, supplying energy to drive the reactions in the light-dependent stage of photosynthesis?
photosynthetic pigments
photosystem
colour factory
confetti
What graph shows the absorbance of different wavelengths of light by photosynthetic pigments?
action spectrum
visible light spectrum
reaction spectrum
absorption spectrum
Reorder the following stages of the light-dependent reaction.
photosystem absorbs light energy, delocalised electrons within the pigments become energised or ‘excited'
Excited electrons from Photosystem II (P680) are transferred to an electron transport chain
The H+ ions return to the stroma via the transmembrane enzyme ATP synthase
he newly de-energised electrons from Photosystem II are taken up by Photosystem I
Water is split by light energy into H+ ions (used in chemiosmosis) and oxygen
What five carbon compound combines with carbon dioxide in the light-independent reaction?
(a)
Which photosystem includes a water-splitting enzyme?
(a)
Reorder the following stages of cyclic photophosphorylation.
light is absorbed by Photosystem II
the excited electrons enter into an electron transport chain to produce ATP
photoactivation of Photosystem I results in the release of electrons which reduce NADP+
photolysis of water
electrons from photolysis replaces electrons lost by PSII
Which of the following are limiting factors of photosynthesis?
oxygen
carbon dioxide
light intensity
temperature
supply of water
What substance from the Calvin cycle can be used in the synthesis of lipids and amino acids?
(a)
