Free MCQs of Class 10 Science Chapter 6 “Life processes”. Students can practice free MCQs as have been added by CBSE in the new Exam pattern. At the end of Multiple Choice Questions, the answer key has also been provided for your reference.
Q1. In which of the following group/ groups of animals, heart does not pump oxygenated blood to different parts of the body?
(a) Pisces only
(b) Amphibians only
(c) Amphibians and reptiles only
(d) Pisces and amphibians
(a) Pisces only
Q2. The filtration units of kidneys are called –
(a) Ureter
(b) Urethra
(c) Neurons
(d) nephrons.
(d) nephrons.
Q3. Name the substances whose build up in the muscles during vigorous physical exercise may cause cramps?
(a) Ethanol + Carbon dioxide + Energy
(b) Lactic acid + Energy
(c) Carbon dioxide + Water + Energy
(d) Pyruvate
(b) Lactic acid + Energy
Q4. When air is blown from mouth into a test – tube containing lime water, the lime water turned milky due to presence of:
(a) oxygen
(b) nitrogen
(c) water vapour
(d) carbon dioxide
(d) carbon dioxide
Q5. The mode of nutrition found in fungi is:
(a) Parasitic nutrition
(b) Holozoic nutrition
(c) Autotrophic nutrition
(d) Saprotrophic nutrition
(d) Saprotrophic nutrition
Q6. During contraction of heart, what prevents backflow of blood?
(a) Thin walls of atria
(b) Thick muscular walls of ventricles
(c) Valves in heart
(d) All of the above
(c) Valves in heart
Q7. Which region of the alimentary canal absorbs the digested food?
(a) Stomach
(b) Small intestine
(c) Large intestine
(d) Liver
(b) Small intestine
Q8. When air is blown from mouth into a test-tube containing lime water, the lime water turned milky due to the presence of
(a) oxygen
(b) carbon dioxide
(c) nitrogen
(d) water vapour
(b) carbon dioxide
Q9. What prevents backflow of blood inside the heart during contraction?
(a) Valves in heart
(b) Thick muscular walls of ventricles
(c) Thin walls of atria
(d) All of the above
(a) Valves in heart
Q10. In which of the following vertebrate group/groups, heart does not pump oxygenated blood to different parts of the body?
(a) Pisces and amphibians
(b) Amphibians and reptiles
(c) Amphibians only
(d) Pisces only
(d) Pisces only
Q11. Which of the following equations is the summary of photosynthesis?
(a) 6CO2 + 12H2O ? C6H12O6 + 6O2 + 6H2O
(b) 6CO2 + H2O + Sunlight ? C6H12O6 + O2 + 6H2O
(c) 6CO2 + 12H2O + Chlorophyll + Sunlight ? C6H12O6 + 6O2 + 6H2O
(d) 6CO2 + 12H2O + Chlorophyll + Sunlight ? C6H12O6 + 6CO2 + 6H2O
(c) 6CO2 + 12H2O + Chlorophyll + Sunlight ? C6H12O6 + 6O2 + 6H2O
Q12. Which is the first enzyme to mix with food i the digestive tract?
(a) Pepsin
(b) Cellulose
(c) Amylase
(d) Trypsin
(c) Amylase
Q13. Lack of oxygen in muscles often leads to cramps among cricketers. This results due to
(a) conversion of pyruvate to ethanol
(b) conversion of pyruvate to glucose
(c) non conversion of glucose to pyruvate
(d) conversion of pyruvate to lactic acid
(d) conversion of pyruvate to lactic acid
Q14. Name the substances whose build up in the muscles during vigorous physical exercise may cause cramps?
(a) Ethanol + Carbon dioxide + Energy
(b) Lactic acid + Energy
(c) Carbon dioxide + Water + Energy
(d) Pyruvate
(b) Lactic acid + Energy
Q15. The breakdown of pyruvate to give carbon di-oxide, water and energy takes place in
(a) cytoplasm
(b) mitochondria
(c) chloroplast
(d) nucleus
(b) mitochondria
Q16. The filtration units of kidneys are called –
(a) Ureter
(b) Urethra
(c) Neurons
(d) nephrons.
(d) nephrons.
Q17. Glycolysis process occurs in which part of the cell?
(a) Cytoplasm
(b) Nucleus
(c) Mitochondria
(d) Chloroplast
(a) Cytoplasm
Q18. In which of the following group/ groups of animals, heart does not pump oxygenated
blood to different parts of the body?
(a) Pisces only
(b) Amphibians only
(c) Amphibians and reptiles only
(d) Pisces and amphibians
(a) Pisces only
Q19. The respiratory pigment in human beings is:
(a) carotene
(b) chlorophyll
(c) haemoglobin
(d) mitochondria
(c) haemoglobin
Q20. The movement of food in phloem is called:
(a) transpiration
(b) translocation
(c) respiration
(d) evaporation
(b) translocation
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