CBSE Class 10 Science Chapter 6 Life Processes Unsolved MCQ

Q.21. Rajib was absent in the class because of muscle pain which he claims to be due to excess physical exercise he had done yesterday. This pain is due to
a) Formation of lactic acid
b) Formation of acetic acid
c) Formation of Pyruvic acid
d) Formation of Hydrochloric acid

Q.22. Right part of the human heart contains
a) Oxygenated blood
b) Mixed blood
c) Deoxygenated blood
d) No blood

Q.23. The transport of soluble products of photosynthesis is called translocation and it occurs in the part of the vascular tissue called
a) Xylem
b) Sclerenchyma
c) Phloem
d) Collenchyma

Q.24. In human each kidney has large numbers of filtration units called _
a) Neutrons
b) Neurons
c) Neptune
d) Nephrons

Q.25. Haemoglobin is a type of
(a) Carbohydrate
(b) Skin Pigment
(c) Vitamin
(d) Respiratory Pigment

Q.26. If kidney fails to reabsorb water, the tissues would
(a) remain unaffected
(b) shrink to shrivel
(c) absorb water from blood
(d) take more oxygen from blood

Q.27. Which of the following statements about the autotrophs is incorrect?
(a) They synthesise carbohydrates from carbon dioxide and water in the presence of sunlight and chlorophyll
(b) They store carbohydrates in the form of starch
(c) They convert carbon dioxide and water into carbohydrates in the absence of sunlight
(d) They constitute the first trophic level in food chains

Q.28. In which of the following groups of organisms, food material is broken down outside the body and absorbed?
(a) Mushroom, green plants, Amoeba
(b) Yeast, mushroom, bread mould
(c) Paramecium, Amoeba, Cuscuta
(d) Cuscuta, lice, tapeworm

Q.29. Select the correct statement
(a) Heterotrophs do not synthesise their own food
(b) Heterotrophs utilise solar energy for photosynthesis
(c) Heterotrophs synthesise their own food
(d) Heterotrophs are capable of converting carbon dioxide and water into carbohydrates

Q.30. Which is the correct sequence of parts in human alimentary canal?
(a) Mouth →stomach →small intestine →oesophagus →large intestine
(b) Mouth →oesophagus →stomach →large intestine →small intestine
(c) Mouth →stomach →oesophagus →small intestine →large intestine
(d) Mouth →oesophagus →stomach →small intestine →large intestine

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