MCQ TEST LIFE PROCESSES Marks : 40

Q1) In amoeba, food is digested in the:

(a) Food vacuole
(b) Mitochondria
(c) Pseudopodia
(d) Chloroplast

Q2) In which of the following groups of organisms are food materials 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

Q3) The contraction and expansion movement of the walls of the food pipe is called:
(a) Translocation
(b) Transpiration
(c) Peristaltic movement
(d) Digestion

Q4) What are the products obtained by anaerobic respiration in plants?

(a) Lactic acid + energy
(b) Carbon dioxide + water + energy
(c) Ethanol + carbon dioxide + energy
(d) Pyruvate

Q5) When a few drops of iodine solution are added to rice water, the solution turns blue-black in
colour. This indicates that rice water contains:
(a) Fats
(b) Complex proteins
(c) Starch
(d) Simple proteins

Q7) The respiratory pigment in human beings is:

(a) Carotene
(b) Chlorophyll
(c) Haemoglobin
(d) Mitochondria

Q8) Which of the following is the important characteristic of Emphysema?

(a) Destruction of the alveolar wall and air sacs in the lungs are damaged
(b) Increase in the growth of the lung tissue
(c) Inflammation in the wall of the bronchi
(d) Thickening of the artery walls of the lungs

Q9)The following image shows the bread moulds on bread:

How do these fungi obtain nutrition?
(a) By eating the bread on which it is growing
(b) By using nutrients from the bread to prepare their own food
(c) By breaking down the nutrients of bread and then absorbing them
(d) By allowing other organisms to grow on the bread and then consuming them
Q6) Which of the equations shows the correct conversion of CO2 and H2O into carbohydrates in
plants?

Q10) The characteristic processes observed in anaerobic respiration are:

i) Presence of oxygen
ii) Release of carbon dioxide
iii) Release of energy
iv) Release of lactic acid

(a) i), ii) only

(b) i), ii), iii) only
(c) ii), iii), iv) only
(d) iv) only

Q11) The opening and closing of the stomatal pore depend upon:
(a) Oxygen
(b) Temperature
(c) Water in the guard cells
(d) Concentration of CO2

Q12) The given image shows how Amoeba obtains nutrition.

How is this process advantageous for amoeba?
(a) Capturing food takes less time
(b) Complex food can be digested easily
(c) More amount of food can be consumed
(d) Fast distribution of nutrition within the body

Q13) A plant gets rid of excess water through transpiration. What is the method used by plants to
get rid of solid waste products?
(a) Shortening of stem
(b) Dropping down fruits
(c) Shedding of yellow leaves
(d) Expansion of roots into the soil
Q14) Chemicals present in tobacco smoke lead to the breakdown of the elastic tissue in the alveoli.
Name this specific condition.
(a) Heart disease
(b) Emphysema
(c) Bronchitis
(d) Lung cancer

Q15) Digestion of food starts from which organ of the human digestive system?
(a) Mouth due to the presence of saliva
(b) Oesophagus that moves the food in the gut
(c) Pancreas that releases juices for fat breakdown
(d) Stomach that helps in mixing food with digestive juices

Q16) The image shows the excretory system in humans.

What is the importance of the labelled part in the excretory system?
(a) It produces urine.
(b) It filters waste from the blood.
(c) It stores the urine till urination.
(d) It carries urine from the kidney to the outside.

Q17) Which of the following option shows the transport of oxygen to the cell correctly?
(a) Lungs →pulmonary vein →left atrium →left ventricle →aorta → body cells
(b) Lungs →pulmonary vein →right atrium →right ventricle → aorta → body cells
(c) Lungs →pulmonary artery →left atrium → left ventricle → vena cava → body cells
(d) Lungs →pulmonary artery →right atrium → right ventricle→ vena cava → body cells

Q18) What is the percentage of oxygen in the expired air when a person is resting?
(a) 12%
(b) 16%
(c) 20%
(d) 24%

Q19) How is food transported from the phloem to the tissues according to plants’ needs?
(a) Food is transported along with the water in the plant’s body
(b) Food is transported in only one direction, like water in the plant body through the xylem
(c) Food is transported from a region with a low concentration to a higher concentration
(d) Food is transported from the region where it is produced to other parts of the plants

Q20) Which of the following is the correct sequence of body parts in the human alimentary canal?
(a) Mouth → stomach → small intestine → large intestine → oesophagus
(b) Mouth → oesophagus → stomach → small intestine → large intestine
(c) Mouth → stomach → oesophagus → small intestine → large intestine
(d) Mouth → oesophagus → stomach → large intestine → small intestine
21. The mode of nutrition found in fungi is:
(a) Parasitic nutrition
(b) Holozoic nutrition
(c) Autotrophic nutrition
(d) Saprotrophic nutrition

22. Which of the following events in the mouth cavity will be affected if salivary amylase is lacking
in the saliva?
(a) Starch breaking down into sugars.
(b) Proteins breaking down into amino acids.
(c) Absorption of vitamins.
(d) Fats breaking down into fatty acids and glycerol.

23. When a few drops of iodine solution are added to rice water, the solution turns blue- black in
colour. This indicates that rice water contains:
(a) fats
(b) complex proteins
(c) starch
(d) simple proteins

24. What are the products obtained by anaerobic respiration in plants?

(a) Lactic acid + Energy
(b) Carbon dioxide + Water + Energy
(c) Ethanol + Carbon dioxide + Energy
(d) Pyruvate

25. The breakdown of pyruvate to give carbon di-oxide, water and energy takes place in
(a) cytoplasm
(b) mitochondria
(c) chloroplast
(d) nucleus

26. Name the pores in a leaf through which respiratory exchange of gases takes place.
(a) Lenticels
(b) Vacuoles
(c) Xylem
(d) Stomata

27. Which plant tissue transports water and minerals from the roots to the leaf?
(a) Xylem
(b) Phloem
(c) Parenchyma
(d) Collenchyma
28. A blood vessel which pumps the blood from the heart to the entire body:
(a) artery
(b) capillary
(c) Vein
(d) Haemoglobin

29. Name a circulatory fluid in the human body other than blood.
(a) Platelets
(b) RBC
(c) Lymph
(d) Plasma

30. Which part of nephron allows the selective reabsorption of useful substances like glucose, amino
acids, salts and water into the blood capillaries?
(a) Tubule
(b) Glomerulus
(c) Bowman’s capsule
(d) Ureter

31. Identify the correct path of urine in the human body.

(a) Kidney → urinary bladder → urethra → ureter
(b) Urinary bladder → ureter → kidney → urethra
(c) Kidney → ureter → urethra → urinary bladder
(d) Kidney → ureter → urinary bladder → urethra

32. What is the functional unit of the kidney?

a) Nephron
b) Neuron
c) Alveoli
d) Villus

33. Which type of blood vessel has valves to prevent backflow of blood?
a) Arteries
b) Veins
c) Capillaries
d) Arterioles

34.What is the main function of white blood cells?

a) Carrying oxygen
b) Fighting infections
c) Clotting blood
d) Carrying nutrients

35. Which organ stores and concentrates bile?

a) Stomach
b) Liver
c) Gallbladder
d) Pancreas
36. Which life process involves the intake and utilization of food?
a) Respiration
b) Nutrition
c) Excretion
d) Reproduction

37. What is the main function of the alveoli in the lungs?

a) To filter blood
b) To exchange gases
c) To digest food
d) To produce hormones

38. Which structure in the heart prevents the backflow of blood?

a) Valves
b) Arteries
c) Veins
d) Capillaries

39. Which system in the body is responsible for transporting nutrients and oxygen?
a) Respiratory system
b) Digestive system
c) Circulatory system
d) Excretory system

40. What is the main purpose of respiration?

a) To produce food
b) To release energy
c) To release oxygen
d) To absorb carbon dioxide

41. Which process in plants involves the loss of water vapor through stomata?
a) Transpiration
b) Respiration
c) Photosynthesis
d) Absorption

42. The enzyme trypsin acts on which of the following?

(a)Proteins
(b)Fats
(c) Lipids
(d) Carbohydrate

43. Bicuspid valve is present between

(a) left atrium and left ventricle
(b) right atrium and right ventricle
(c) pulmonary artery and right ventricle
(d) aorta and left ventricle.