Class 10 Practice – Level 3 – Life Processes – Set 2 Leave a Comment / By Gulam Hamza / July 31, 2024 Class 10 Practice - Level 3 - Life Processes - Set 2 Total questions: 15 1. Which molecule acts as the primary energy currency in cells? Topic: Nutrition Glucose ATP (Adenosine triphosphate) NADH FADHâ‚‚ None 2. In the Calvin cycle of photosynthesis, which molecule is the primary COâ‚‚ acceptor? Topic: Nutrition Ribulose-1,5-bisphosphate (RuBP) 3-phosphoglycerate (3-PGA) Glyceraldehyde-3-phosphate (G3P) Glucose None 3. What is the role of the pyruvate dehydrogenase complex in cellular respiration? Topic: Respiration To convert pyruvate to acetyl-CoA To generate ATP directly To transport electrons in the electron transport chain To phosphorylate glucose None 4. Which intermediate of the Krebs cycle is involved in both catabolic and anabolic pathways? Topic: Respiration Citrate Isocitrate α-Ketoglutarate Succinyl-CoA None 5. Which mechanism explains the movement of water in and out of cells based on solute concentration? Topic: Transportation Active transport Osmosis Diffusion Facilitated diffusion None 6. Which blood component is primarily responsible for maintaining osmotic pressure and pH balance? Topic: Transportation Red blood cells White blood cells Platelets Plasma proteins None 7. Which hormone is released in response to low blood pressure and stimulates the reabsorption of sodium in the kidneys? Topic: Excretion Insulin Aldosterone Adrenaline Glucagon None 8. Which structure in the nephron is primarily involved in the concentration of urine? Topic: Excretion Glomerulus Proximal convoluted tubule Loop of Henle Collecting duct None 9. Which vitamin is a cofactor for the enzyme pyruvate carboxylase in gluconeogenesis? Topic: Nutrition Vitamin B1 (Thiamine) Vitamin B6 (Pyridoxine) Vitamin B7 (Biotin) Vitamin B12 (Cobalamin) None 10. Which mineral acts as a cofactor for over 300 enzymes, including those involved in DNA synthesis and repair ? Topic: Nutrition Calcium Magnesium Iron Zinc None 11. Which process generates the most ATP during cellular respiration? Topic: Respiration Glycolysis Krebs cycle Oxidative phosphorylation Fermentation None 12. Which molecule is produced as a result of anaerobic respiration in muscle cells? Topic: Respiration Ethanol Lactate Acetyl-CoA Citrate None 13. Which condition is characterized by the inability of red blood cells to carry sufficient oxygen due to a genetic mutation in haemoglobin? Topic: Transportation Thalassemia Anaemia Sickle cell disease Haemophilia None 14. Which component of the blood is essential for forming clots to prevent bleeding? Topic: Transportation Red blood cells White blood cells Platelets Plasma None 15. Which condition results from the progressive loss of kidney function over time? Topic: Excretion Hepatitis Chronic kidney disease (CKD) Pancreatitis Diabetes None 1 out of 15 Time's up
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