AEROBIC RESPIRATION

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Mitochondrial energy basics

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Rizza Mae Olimba

Philippines

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AEROBIC RESPIRATION


Froggy Jumps AEROBIC RESPIRATIONOnline version Mitochondrial energy basics by Rizza Mae Olimba 1 What molecule combines with oxaloacetate to form citrate? a FADH2 b Pyruvate c Acetyl-CoA 2 Which enzyme converts isocitrate to alpha-ketoglutarate, releasing CO2 and NADH? a Aconitase b Citrate synthase c Isocitrate dehydrogenase 3 Which enzyme forms citrate from acetyl-CoA and oxaloacetate? a Citrate lyase b Citrate synthase c Succinate dehydrogenase 4 What is the overall process by which cells break down glucose to release energy? a Photosynthesis b Cellular respiration c Fermentation 5 What molecule is broken down during glycolysis? a ATP b Oxygen c Glucose 6 How many carbon atoms are present in glucose? a 2 b 4 c 6 7 What is the end product of glycolysis? a Acetyl-CoA b Pyruvate c Oxaloacetate 8 How many ATP molecules are invested during the energy investment phase of glycolysis? a 2 b 4 c 6 9 What six-carbon molecule is the starting material of glycolysis? a Pyruvate b Glucose c Acetyl-CoA 10 What molecule carries the acetyl group into the Krebs cycle? a NADH b Coenzyme A c ATP 11 What enzyme complex is responsible for converting pyruvate into acetyl-CoA? a Pyruvate synthase b Pyruvate dehydrogenase complex c Pyruvate decarboxylase complex 12 What is another name for the Krebs cycle? a Calvin cycle b Citric acid cycle c Glycolytic cycle 13 How many carbon atoms does citrate contain? a 2 b 3 c 6 14 What molecule is regenerated at the end of the Krebs cycle? a Glucose b Oxaloacetate c Pyruvate 15 How many times does the Krebs cycle turn for each glucose molecule? a Once b Twice c Three times 16 What other electron carrier accepts high-energy electrons during the Krebs cycle? a NAD⁺ b FAD c ATP 17 Which Krebs cycle intermediate contains four carbon atoms and follows α-ketoglutarate? a Succinate b Citrate c Pyruvate 18 Which compound follows isocitrate in the Krebs cycle? a Citrate b α-Ketoglutarate c Succinate 19 What is the main function of the electron transport chain? a Break down glucose directly b Produce pyruvate c Transfer electrons and pump protons 20 What molecules donate electrons to the electron transport chain? a NADH and FADH₂ b ATP and ADP c CO₂ and O₂ 21 What is the first electron carrier that donates electrons from NADH to the ETC? a Complex I b Complex II c Complex IV 22 Which complex receives electrons from FADH₂? a Complex I b Complex II c Complex III 23 Which molecule carries electrons from Complex I and II to Complex III? a Coenzyme Q b ATP c NAD⁺ 24 Which protein carries electrons from Complex III to Complex IV? a Cytochrome c b ATP synthase c Ubiquinone 25 What molecule is formed when oxygen accepts electrons and hydrogen ions? a Glucose b Water c Carbon dioxide 26 What are the protons pumped across the membrane? a H⁺ ions b OH⁻ ions c Na⁺ ions 27 What process uses the proton gradient to produce ATP? a Glycolysis b Chemiosmosis c Decarboxylation 28 Where do protons accumulate during electron transport? a Mitochondrial matrix b Intermembrane space c Cytoplasm 29 What are the major waste products of aerobic respiration? a Oxygen and glucose b ATP and glucose c Carbon dioxide and water 30 Which organelle is primarily responsible for aerobic respiration in eukaryotic cells? a Chloroplast b Mitochondrion c Ribosome 31 What is the movement of H⁺ ions through ATP synthase called? a Diffusion b Oxidation c Chemiosmosis 32 Which enzyme catalyzes the first step of glycolysis? a Hexokinase b Aldolase c Pyruvate kinase 33 Which enzyme converts fructose-6-phosphate into fructose-1,6-bisphosphate? a Hexokinase b Phosphofructokinase c Phosphofructose isomerase 34 Which enzyme splits fructose-1,6-bisphosphate into two three-carbon molecules? a Enolase b Hexokinase c Aldolase 35 Which enzyme converts dihydroxyacetone phosphate into glyceraldehyde-3-phosphate? a Triose phosphate isomerase b Pyruvate kinase c Glyceraldehyde-3-phosphate dehydrogenase 36 Which enzyme converts 3-phosphoglycerate into 2-phosphoglycerate? a Phosphoglycerate mutase b Phosphoglycerate kinase c Enolase 37 Which enzyme converts 2-phosphoglycerate into phosphoenolpyruvate? a Pyruvate kinase b Hexokinase c Enolase 38 Where is ATP synthase located in mitochondria? a Inner mitochondrial membrane b Outer mitochondrial membrane c Mitochondrial matrix only 39 Which enzyme is directly responsible for ATP production during oxidative phosphorylation? a Citrate synthase b Succinate dehydrogenase c ATP synthase

AEROBIC RESPIRATION

Froggy Jumps

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AEROBIC RESPIRATIONOnline version

by Rizza Mae Olimba

What molecule combines with oxaloacetate to form citrate?

Which enzyme converts isocitrate to alpha-ketoglutarate, releasing CO2 and NADH?

Which enzyme forms citrate from acetyl-CoA and oxaloacetate?

What is the overall process by which cells break down glucose to release energy?

What molecule is broken down during glycolysis?

How many carbon atoms are present in glucose?

What is the end product of glycolysis?

How many ATP molecules are invested during the energy investment phase of glycolysis?

What six-carbon molecule is the starting material of glycolysis?

What molecule carries the acetyl group into the Krebs cycle?

What enzyme complex is responsible for converting pyruvate into acetyl-CoA?

What is another name for the Krebs cycle?

How many carbon atoms does citrate contain?

What molecule is regenerated at the end of the Krebs cycle?

How many times does the Krebs cycle turn for each glucose molecule?

What other electron carrier accepts high-energy electrons during the Krebs cycle?

Which Krebs cycle intermediate contains four carbon atoms and follows α-ketoglutarate?

Which compound follows isocitrate in the Krebs cycle?

What is the main function of the electron transport chain?

What molecules donate electrons to the electron transport chain?

What is the first electron carrier that donates electrons from NADH to the ETC?

Which complex receives electrons from FADH₂?

Which molecule carries electrons from Complex I and II to Complex III?

Which protein carries electrons from Complex III to Complex IV?

What molecule is formed when oxygen accepts electrons and hydrogen ions?

What are the protons pumped across the membrane?

What process uses the proton gradient to produce ATP?

Where do protons accumulate during electron transport?

What are the major waste products of aerobic respiration?

Which organelle is primarily responsible for aerobic respiration in eukaryotic cells?

What is the movement of H⁺ ions through ATP synthase called?

Which enzyme catalyzes the first step of glycolysis?

Which enzyme converts fructose-6-phosphate into fructose-1,6-bisphosphate?

Which enzyme splits fructose-1,6-bisphosphate into two three-carbon molecules?

Which enzyme converts dihydroxyacetone phosphate into glyceraldehyde-3-phosphate?

Which enzyme converts 3-phosphoglycerate into 2-phosphoglycerate?

Which enzyme converts 2-phosphoglycerate into phosphoenolpyruvate?

Where is ATP synthase located in mitochondria?

Which enzyme is directly responsible for ATP production during oxidative phosphorylation?