• Question: I am the powerhouse of the cell, where energy is produced. What am I?
• Answer: Mitochondria
• Question: I am a double-helix structure containing genetic information. What am I?
• Answer: DNA
• Question: I am the enzyme responsible for breaking down starch into sugar. What am I?
• Answer: Amylase
• Question: I am the process by which plants convert sunlight into energy. What am I?
• Answer: Photosynthesis
• Question: I am a molecule that stores genetic information in all living organisms. What am I?
• Answer: RNA
• Question: I am the building block of proteins. What am I?
• Answer: Amino acid
• Question: I am a macromolecule composed of long chains of nucleotides. What am I?
• Answer: RNA
• Question: I am the process by which cells replicate their DNA. What am I?
• Answer: DNA replication
• Question: I am a type of lipid that forms the main component of cell membranes. What am I?
• Answer: Phospholipid
• Question: I am the process by which glucose is converted into pyruvate. What am I?
• Answer: Glycolysis
• Question: I am the organelle responsible for protein synthesis. What am I?
• Answer: Ribosome
• Question: I am the molecule that carries oxygen in red blood cells. What am I?
• Answer: Hemoglobin
• Question: I am the enzyme that catalyzes the conversion of ATP to cAMP. What am I?
• Answer: Adenylate cyclase
• Question: I am the process by which cells break down glucose to produce ATP in the absence of oxygen. What am I?
• Answer: Anaerobic respiration
• Question: I am the site of photosynthesis in plant cells. What am I?
• Answer: Chloroplast
• Question: I am the molecule responsible for carrying electrons during cellular respiration. What am I?
• Answer: NADH
• Question: I am the enzyme responsible for unwinding DNA during replication. What am I?
• Answer: Helicase
• Question: I am the process by which mRNA is synthesized from a DNA template. What am I?
• Answer: Transcription
• Question: I am the enzyme responsible for joining Okazaki fragments during DNA replication. What am I?
• Answer: DNA ligase

• Question: I am the process by which amino acids are linked together to form proteins. What am I?
• Answer: Translation
• Question: I am the molecule responsible for storing and transferring energy within cells. What am I?
• Answer: ATP (Adenosine triphosphate)
• Question: I am the organelle responsible for detoxifying harmful substances in the cell. What am I?
• Answer: Smooth endoplasmic reticulum
• Question: I am the enzyme responsible for adding nucleotides to a growing DNA strand during replication. What am I?
• Answer: DNA polymerase
• Question: I am the process by which DNA is transcribed into mRNA. What am I?
• Answer: RNA transcription
• Question: I am the molecule that carries amino acids to the ribosome during protein synthesis. What am I?
• Answer: tRNA (transfer RNA)
• Question: I am the organelle responsible for modifying, sorting, and packaging proteins for secretion. What am I?
• Answer: Golgi apparatus
• Question: I am the molecule that provides structural support to cells and tissues. What am I?
• Answer: Collagen
• Question: I am the process by which cells break down molecules to release energy. What am I?
• Answer: Catabolism
• Question: I am the enzyme responsible for catalyzing the conversion of glucose to pyruvate during glycolysis. What am I?
• Answer: Hexokinase
• Question: I am the molecule that carries genetic information from the nucleus to the cytoplasm. What am I?
• Answer: mRNA (messenger RNA)
• Question: I am the process by which amino acids are broken down to release energy. What am I?
• Answer: Proteolysis
• Question: I am the enzyme responsible for adding a phosphate group to ADP to form ATP. What am I?
• Answer: ATP synthase
• Question: I am the process by which DNA is replicated to produce two identical copies. What am I?
• Answer: DNA replication
• Question: I am the molecule that carries electrons to the electron transport chain during cellular respiration. What am I?
• Answer: FADH2 (Flavin adenine dinucleotide)
• Question: I am the enzyme responsible for breaking down hydrogen peroxide into water and oxygen. What am I?
• Answer: Catalase
• Question: I am the process by which cells capture light energy and convert it into chemical energy. What am I?
• Answer: Photophosphorylation
• Question: I am the molecule that serves as a template for the synthesis of RNA during transcription. What am I?
• Answer: DNA template

Another Biochemistry riddles

• Question: I am the process by which cells break down fatty acids to produce energy. What am I?
• Answer: Beta-oxidation
• Question: I am the molecule that carries high-energy electrons from glycolysis and the citric acid cycle to the electron transport chain. What am I?
• Answer: NADH (Nicotinamide adenine dinucleotide)
• Question: I am the enzyme responsible for converting glucose-6-phosphate to fructose-6-phosphate in glycolysis. What am I?
• Answer: Phosphoglucose isomerase
• Question: I am the process by which nitrogen is removed from amino acids to form ammonia. What am I?
• Answer: Deamination
• Question: I am the molecule that serves as a temporary storage of excess glucose in the liver and muscle cells. What am I?
• Answer: Glycogen
• Question: I am the enzyme responsible for converting pyruvate to acetyl-CoA in the citric acid cycle. What am I?
• Answer: Pyruvate dehydrogenase
• Question: I am the process by which cells recycle and degrade damaged or unnecessary cellular components. What am I?
• Answer: Autophagy
• Question: I am the molecule responsible for transporting electrons from complex III to complex IV in the electron transport chain. What am I?
• Answer: Cytochrome c
• Question: I am the enzyme responsible for adding a phosphate group to fructose-6-phosphate to form fructose-1,6-bisphosphate in glycolysis. What am I?
• Answer: Phosphofructokinase
• Question: I am the process by which amino acids are synthesized from simpler molecules. What am I?
• Answer: Amino acid biosynthesis
• Question: I am the molecule that carries carbon dioxide from tissues to the lungs for exhalation. What am I?
• Answer: Hemoglobin
• Question: I am the enzyme responsible for breaking down sucrose into glucose and fructose. What am I?
• Answer: Sucrase
• Question: I am the process by which ATP is synthesized using the energy released by the movement of protons across a membrane. What am I?
• Answer: Chemiosmosis
• Question: I am the molecule that carries electrons from complex II to complex III in the electron transport chain. What am I?
• Answer: Ubiquinone (Coenzyme Q)
• Question: I am the enzyme responsible for converting citrate to isocitrate in the citric acid cycle. What am I?
• Answer: Aconitase
• Question: I am the process by which glucose is converted to lactic acid in the absence of oxygen. What am I?
• Answer: Lactic acid fermentation
• Question: I am the molecule that carries electrons from complex I to complex III in the electron transport chain. What am I?
• Answer: Coenzyme Q10
• Question: I am the enzyme responsible for converting ribulose-1,5-bisphosphate to 3-phosphoglycerate in the Calvin cycle. What am I?
• Answer: Ribulose-1,5-bisphosphate carboxylase/oxygenase (RuBisCO)

• Question: I am the process by which glucose is converted into glycogen for storage in the liver and muscles. What am I?
• Answer: Glycogenesis
• Question: I am the molecule that carries electrons from complex IV to complex I in the electron transport chain. What am I?
• Answer: Cytochrome c oxidase
• Question: I am the enzyme responsible for converting malate to oxaloacetate in the citric acid cycle. What am I?
• Answer: Malate dehydrogenase
• Question: I am the process by which nitrogen is incorporated into organic compounds to form amino acids. What am I?
• Answer: Nitrogen fixation
• Question: I am the molecule that carries carbon dioxide in the blood from the tissues to the lungs for exhalation. What am I?
• Answer: Bicarbonate ion (HCO3-)
• Question: I am the enzyme responsible for converting acetyl-CoA to citrate in the citric acid cycle. What am I?
• Answer: Citrate synthase
• Question: I am the process by which lipids are broken down into fatty acids and glycerol. What am I?
• Answer: Lipolysis
• Question: I am the molecule that carries electrons from complex II to complex III in the electron transport chain. What am I?
• Answer: Succinate
• Question: I am the enzyme responsible for converting isocitrate to alpha-ketoglutarate in the citric acid cycle. What am I?
• Answer: Isocitrate dehydrogenase
• Question: I am the process by which glucose is converted into two molecules of pyruvate. What am I?
• Answer: Glycolysis
• Question: I am the molecule that carries electrons from complex III to complex IV in the electron transport chain. What am I?
• Answer: Cytochrome c reductase
• Question: I am the enzyme responsible for converting fructose-1,6-bisphosphate to glyceraldehyde-3-phosphate in glycolysis. What am I?
• Answer: Aldolase
• Question: I am the process by which cells break down fatty acids into acetyl-CoA molecules. What am I?
• Answer: Fatty acid oxidation (Beta-oxidation)
• Question: I am the molecule that carries electrons from complex IV to oxygen in the electron transport chain. What am I?
• Answer: Water (H2O)
• Question: I am the enzyme responsible for converting succinyl-CoA to succinate in the citric acid cycle. What am I?
• Answer: Succinyl-CoA synthetase
• Question: I am the process by which glucose is converted into glucose-6-phosphate during glycolysis. What am I?
• Answer: Phosphorylation
• Question: I am the molecule that carries electrons from complex I to complex III in the electron transport chain. What am I?
• Answer: Ubiquinone (Coenzyme Q)
• Question: I am the enzyme responsible for converting ribose-5-phosphate to ribulose-5-phosphate in the pentose phosphate pathway. What am I?
• Answer: Ribulose-5-phosphate isomerase

Getting over with Biochemistry riddles

• Question: I am the process by which amino acids are recycled to form new proteins. What am I?
• Answer: Protein turnover
• Question: I am the molecule that carries electrons from complex III to complex IV in the electron transport chain. What am I?
• Answer: Cytochrome c oxidoreductase
• Question: I am the enzyme responsible for converting alpha-ketoglutarate to succinyl-CoA in the citric acid cycle. What am I?
• Answer: Alpha-ketoglutarate dehydrogenase
• Question: I am the process by which ammonia is converted into urea in the liver. What am I?
• Answer: Urea cycle (Ornithine cycle)
• Question: I am the molecule that carries electrons from complex II to complex III in the electron transport chain. What am I?
• Answer: Succinate dehydrogenase
• Question: I am the enzyme responsible for converting citrulline to arginine in the urea cycle. What am I?
• Answer: Argininosuccinate synthase
• Question: I am the process by which glucose is converted into fructose-6-phosphate during glycolysis. What am I?
• Answer: Phosphorylation
• Question: I am the molecule that carries electrons from complex IV to oxygen in the electron transport chain. What am I?
• Answer: Cytochrome c oxidase
• Question: I am the enzyme responsible for converting fumarate to malate in the citric acid cycle. What am I?
• Answer: Fumarase
• Question: I am the process by which glucose-6-phosphate is converted into 6-phosphogluconate in the pentose phosphate pathway. What am I?
• Answer: Oxidative decarboxylation
• Question: I am the molecule that carries electrons from complex I to complex III in the electron transport chain. What am I?
• Answer: Ubiquinone (Coenzyme Q)
• Question: I am the enzyme responsible for converting glycine to serine in the one-carbon metabolism pathway. What am I?
• Answer: Serine hydroxymethyltransferase
• Question: I am the process by which fats are broken down into glycerol and fatty acids. What am I?
• Answer: Lipolysis
• Question: I am the molecule that carries electrons from complex III to complex IV in the electron transport chain. What am I?
• Answer: Cytochrome c
• Question: I am the enzyme responsible for converting ornithine to citrulline in the urea cycle. What am I?
• Answer: Ornithine transcarbamylase
• Question: I am the process by which glucose-6-phosphate is converted into fructose-6-phosphate in glycolysis. What am I?
• Answer: Isomerization
• Question: I am the molecule that carries electrons from complex IV to oxygen in the electron transport chain. What am I?
• Answer: Water (H2O)
• Question: I am the enzyme responsible for converting 3-phosphoglycerate to 2-phosphoglycerate in glycolysis. What am I?
• Answer: Phosphoglycerate mutase