About Life processes

Following are some of the multiple choice questions on the Life processes with answers that will help the students in developing their knowledge.

Life processes MCQ

1. Instrument used to measure blood pressure is

  • Manometer
  • Barometer
  • Sphygmomanometer
  • Stethoscope

2. Roots of the plants absorb water from the soil through the process of:

  • Diffusion
  • Transpiration
  • Osmosis
  • None of these

3. Name a circulatory fluid in the human body other than blood.

  • Platelets
  • RBC
  • Lymph
  • Plasma

4. Which of the following help in protecting the inner lining of the stomach from the harmful effect of hydrochloric acid?

  • Mucus
  • Pepsin
  • Trypsin
  • Bile

5. Which part of nephron allows the selective re absorption of useful substances like glucose, amino acids, salts and water into the blood capillaries?

  • Tubule
  • Glomerulus
  • Bowman’s capsule
  • Ureter

6. The procedure used for cleaning the blood of a person by separating urea from it is called:

  • Osmosis
  • Filtration
  • Dialysis
  • Double circulation

7. Pyruvic acid is converted to lactic acid in the --------of muscle cells

  • Cytoplasm
  • Mitochondria
  • Golgi body
  • None of these

8. The mode of nutrition in Cuscuta

  • Saprophytic
  • Parasitic
  • Holozoic
  • Autotrohpic

9. Which is the first enzyme to mix with food in the digestive tract?

  • Pepsin
  • Cellulose
  • Amylase
  • Trypsin

10. Movement of the synthesized products from the leaves to the roots and other parts of a plant’s body takes place through the phloem. This process is known as:

  • Translocation
  • Transpiration
  • Transportation
  • Excretion

11. In CAM plants CO2 is stored in the form of _________ in the vacuoles.

  • lactic acid
  • malic acid
  • palmitic acid
  • linoleic acid

12. The valve present between right atrium and right ventricle.

  • tricuspid
  • bicuspid
  • pulmonary
  • aortic

13. It is the site of gaseous exchange in human lungs.

  • villi
  • alveoli
  • trachea
  • larynx

14. In unicellular organisms like amoeba gaseous exchange takes place through the process of ____________.

  • osmosis
  • transportation
  • diffusion
  • elimination

15. _______________ is the final product of glycolysis.

  • carbon dioxide
  • ATP
  • Pyruvic acid
  • acetyl coA

16. Glycolysis takes place in the __________ of the cell.

  • mitochondria
  • ribosomes
  • cytoplasm
  • Golgi complex

17. The substance in plants and animals that act as an energy currency.

  • DNA
  • RNA
  • ADP
  • ATP

18. Chloroplasts are present in the ___________ of the leaf.

  • palisade parenchyma
  • aerenchyma
  • sclrenchyma
  • collenchyma

19. A blood vessel which carries blood back to heart is

  • Artery
  • Vein
  • Capillary
  • All of above

20. The digestive juice produced by stomach contains

  • Hydrochloric acid
  • Pepsin
  • Mucus
  • All of above

21. Strongest substance present in our body is

  • Tooth Enamel
  • dentin
  • Both A & B
  • None of these

22. Digestion starts from

  • Stomach
  • Small intestine
  • Oesophagus
  • Buccal cavity

23. Saliva contains the enzyme named:

  • Pepsin
  • Amylase
  • Luciferase
  • None of these

24. Teeth are covered with a thin coating of

  • Dentine
  • Crown
  • Enamel
  • Cementum

25. In the process of respiration __________________________

  • ADP is converted into ATP
  • Glucose is converted into carbondioxide
  • glucose is converted into carbondioxide and water which releases energy
  • pyruvic acid is converted into ATP

26. The largest artery in the human body is _________________

  • pulmonary artery
  • venacava
  • capillaries
  • aorta

27. Pericardium is the protective membrane outside the _________

  • Heart
  • Kidney
  • Lungs
  • Stomach

28. Nitrogenous waste are formed by the breakdown of _______

  • ammonia
  • fat
  • aminoacids
  • carbohydrates

29. Nephrons pour their excretory products in _____________

  • Uriniferous tubules
  • collecting tubules
  • kidneys
  • ureter

30. The blood vessels that carry blood back to the heart is ___________

  • artery
  • vein
  • capillary
  • platelets

31. Guard cells are usually ___________________

  • rectangular in shape
  • pear-shaped
  • spherical
  • kidney shaped

32. Excess glucose is stored in the form of glycogen in the _____________

  • pancreas
  • gall bladder
  • blood
  • liver

33. Amoeba captures its food with the help of _________

  • tentacles
  • claws
  • cillia
  • pseudopodia

34. Kind of nutrition in which the organisms feed on dead and decaying organic matter is ____________

  • Holozoic
  • saprophytic
  • parasitic
  • autotrophic

35. Which of the following organisms have single circulation?

  • Fishes
  • Mammals
  • Birds
  • Reptiles

36. The only reptile having 4- chambered heart is

  • Snake
  • Crocodile
  • Lizard
  • Turtle

37. The color of blood plasma is:

  • Red
  • Yellowish green
  • Pink
  • Pale yellow

38. Oxygenated blood reaches heart by

  • Pulmonary artery
  • Aorta
  • Vena cava
  • Pulmonary vein

39. How many chambers does a frog’s heart have?

  • 2
  • 3
  • 4
  • None of these

40. The only artery which carries deoxygenated blood is:

  • Pulmonary artery
  • Renal artery
  • Hepatic artery
  • Coronary artery

41. Choose The Function Of The Pancreatic Juice From The Following

  • Trypsin digests proteins and lipase carbohydrates
  • Trypsin digests emulsified fats and lipase proteins
  • Trypsin and lipase digest fats
  • Trypsin digests proteins and lipase emulsified fats

42. When Air Is Blown From Mouth Into A Test-Tube Containing Lime Water, The Lime Water Turned Milky Due To The Presence Of

  • Carbon dioxide
  • Oxygen
  • Nitrogen
  • Water vapour

43. Which Part Of Alimentary Canal Receives Bile From The Liver?

  • Stomach
  • Oesophagus
  • Large intestine
  • Small intestine

44. Which Of The Following Statement Is Or Are Incorrect?

  • All the living organisms need energy to perform various life processes.
  • Energy is not required by an organism during sleep.
  • Food is a kind of will which provides energy to all living organisms.
  • Our body gets longest size in in early morning in the bed.

45. Chlorophyll pigment is located in which organelle of a cell?

  • Mitochondria
  • Vacuole
  • Plastid
  • Chloroplast

46. Raw materials used in the autotrophic mode of nutrition is:

  • Glucose, Starch, Fructose
  • Protein, Fats
  • Carbon dioxide, water
  • Hydrogen, Oxygen

47. Photosynthesis is:

  • Trapping energy of sunlight to form glucose.
  • Synthesis of photosensitive compounds.
  • Oxidation of glucose
  • Oxidation of carbon dioxide

48. The green pigment used in photosynthesis is

  • Phytochrome
  • Chlorophyll
  • Hemoglobin
  • None

49. Chlorophyll is mainly located in which part of the plant

  • Green leaf
  • Bark
  • Stem
  • Root

50. Chlorophyll has a porphyrin ring with _ _ _ _ _ at the centre.

  • Iron (Fe)
  • Chromium (Cr)
  • Magnesium (Mg)
  • Carbon (C)

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