Test-MCQ Class 10-NCERT -Science-Chapter 6-Test-3 Chapter 6: Life Processes Multiple Choice Questions No of Questions : 20 Marks: 20 Please enter your email: 1. Single circulation i.e., blood flows through the heart only once during one cycle of passage through the body, is exhibited by. Whale, Dolphin, Turtle Hyla, Rana, Draco Labeo, Chameleon, Salamander Hippocampus, Exocoetus, Anabas 2. In which of the following vertebrate group/groups, heart does not pump oxygenated blood to different parts of the body? Pisces and amphibians Pisces only Amphibians only Amphibians and reptiles 3. Choose the correct statement that describes arteries. They have thick elastic walls, blood flows under high pressure; collect blood from different organs and bring it back to the heart They have thick elastic walls without valves inside, blood flows under high pressure and carry blood away from the heart to different parts of the body. They have thick elastic walls, blood flows under low pressure; carry blood from the heart to various organs of the body They have thin walls with valves inside, blood flows under low pressure and carry blood away from the heart to various organs of the body 4. The filtration units of kidneys are called ureter neurons nephrons urethra 5. Oxygen liberated during photosynthesis comes from. glucose water chlorophyll carbon dioxide 6. The blood leaving the tissues becomes richer in oxygen water carbon dioxide heamoglobin 7. Which of the following is an incorrect statement? Organisms grow with time Energy is essential for life processes Movement of molecules does not take place among cells Organisms must repair and maintain their structure 8. The internal (cellular) energy reserve in autotrophs is glycogen fatty acid protein starch 9. Which of the following equations is the summary of photosynthesis? 6CO2 + 12H2 O + Chlorophyll + Sunlight → C6H12O6 + 6O2 + 6H2 O 6CO2 + 12H2 O + Chlorophyll + Sunlight → C6H12O6 + 6CO2 + 6H2 O 6CO2 + 12H2 O → C6H12O6 + 6O2 + 6H2 O 6CO2 + H2 O + Sunlight → C6H12O6 + O2 + 6H2 O 10. Choose the event that does not occur in photosynthesis Conversion of light energy to chemical energy Oxidation of carbon to carbon dioxide Reduction of carbon dioxide to carbohydrates Absorption of light energy by chlorophyll 11. The opening and closing of the stomatal pore depends upon. oxygen water in guard cells concentration of CO2 in stomata temperature 12. Choose the forms in which most plants absorb nitrogen. (i) Proteins (ii) Nitrates and Nitrites (iii) Urea (iv) Atmospheric nitrogen (ii) and (iii) (i) and (ii) (i) and (iv) (iii) and (iv) 13. Which is the first enzyme to mix with food in the digestive tract? Trypsin Amylase Cellulase Pepsin 14. Which of the following statement(s) is (are) correct? (i) Pyruvate can be converted into ethanol and carbon dioxide by yeast (ii) Fermentation takes place in aerobic bacteria (iii) Fermentation takes place in mitochondria (iv) Fermentation is a form of anaerobic respiration (i) and (iii) (i) and (iv) (ii) and (iii) (ii) and (iv) 15. Lack of oxygen in muscles often leads to cramps among cricketers. This results due to conversion of pyruvate to ethanol conversion of pyruvate to lactic acid conversion of pyruvate to glucose non conversion of glucose to pyruvate 16. Choose the correct path of urine in our body kidney → urinary bladder → urethra → ureter urinary bladder → kidney → ureter → urethra kidney → ureters → urinary bladder → urethra kidney → ureter → urethra → urinary bladder 17. During deficiency of oxygen in tissues of human beings, pyruvic acid is converted into lactic acid in the golgi body chloroplast cytoplasm mitochondria 18. The radiant energy is stored in the from of chemical energy – RNA DNA ATP Stored food 19. Trechea has incomplete cartilaginous rings complete chitinous rings C – shaped cartilaginous rings C – shaped chitinous rings 20 : Total number of ATP molecules formed (net gain) during the process of aerobic respiration is – 42 38 14 30 Please Enter Your Name, School Name & Class in the given below box and submit: ( Result will show immediately after submit) Loading … Question 1 of 21
