Chapter 6
Life Processes
MCQs
Q 1.: Amoeba ingests the food with the help of
(A) Oral opening
(B) Cilia
(C) Flagella
(D) Pseudopodia
Option – D
Q 2.: The liver stores food in the form of
(A) Glucose
(B) Albumen
(C) ATP
(D) Glycogen
Option – D
Q 3.: Bile is secreted by
(A) Pancreas
(B) Liver
(C) Intestinal gland
(D) Gastric gland
Option – B
Q 4.: Pepsin digests
(A) Proteins in stomach
(B)Fats in ileum
(C) Carbohydrates in duodenum
(D)Proteins in duodenum
Option – A
Q 5.: The main respiratory substrate used in cells is
(A) Glucose
(B) Fructose
(C) Sucrose
(D) Galactose
Option – A
Q 6.: Blood that leaves tissues is rich in
(A) Oxygen
(B) Carbon dioxide
(C) Amino acid
(D) Oxy-haemoglobin
Option – B
Q 7.: Vocal cords are present in
(A) Larynx
(B) Glottis
(C) Pharynx
(D) Glottis
Option – A
Q 8.: Water enters into root hairs due to
(A) Turgor pressure
(B) Osmotic pressure
(C) Atmospheric pressure
(D) Elastic pressure
Option – B
Q 9.: During photosynthesis, the oxygen gas comes from:
(A) CO2
(B) Both CO2 and H2O
(C) Water
(D) Oxygen via air
Option – C
Q 10.: Pigment haemoglobin is present in
(A) RBC
(B) WBC
(C) Blood platelets
(D) Blood plasma
Option – A
Q 11.: Urine produced in kidneys is stored temporarily in
(A) Urethra
(B) Ureters
(C) Nephron
(D) Urinary bladder
Option – D
Q 12.: The component of blood responsible for transporting O2
(A) RBC
(B) WBC
(C) Platelets
(D) All of these
Option – A
Q 13.: What is correct about human kidney
(A) It is cylindrical
(B) It is bean-shaped
(C) Each kidney has two ureters
(D) Both ‘B’ and ‘C’
Option – D
Q 14.: Tannins are
(A) Aromatic compounds
(B) Secondary metabolites
(C) Primary metabolites
(D) (a) and (b)
Option – D
Q 15.: Concentration of urine depends upon the presence of
(A) Thyroxin
(B) ADH
(C) Vasopressin
(D) Melatonin
Option – B
Q 16.: The process of separation of amino acids into amino group and carboxyl group is called
(A) Amination
(B) Excretion
(C) Defaecation
(D) Deamination
Option – D
Q 17.: The main function of lymph nodes in human body is to
(A) Destroy old and worn out RBCs
(B) Produce a hormone
(C) Produce WBCs
(D) Collect and destroy pathogens entering body
Option – D
Q 18.: Light reaction of photosynthesis takes place in
(A) Stroma of chloroplast
(B) Grana of chloroplast
(C) Cytoplasm
(D)Mitochondria
Option – B
Q 19.: Dark reaction in photosynthesis is called so because
(A) It doesn’t require light energy
(B) It occurs more than rapidly in night
(C) It can also occur in darkness
(D) It can’t occur during daytime
Option – A
Q 20.: Vermiform appendix is a part of
(A) Alimentary canal
(B) Nervous system
(C) Vascular system
(D) Reproductive system
Option – A
Q 21.: Which part of alimentary canal of man does not secrete any enzyme?
(A) Mouth
(B) Oesophagus
(C) Stomach
(D) Duodenum
Option – B
Q 22.: The common phase between aerobic and anaerobic respiration is called
(A) C4 cycle
(B) Krebs cycle
(C) Glycolysis
(D) None of these
Option – C
Q 23.: The autotrophic mode of nutrition requires
(A) CO2 and H2O
(B) Chlorophyll
(C) Sunlight
(D) All of these
Option – D
Q 24.: Emulsification of fat is carried out by
(A) Gastric juice
(B) Bile juice
(C) Intestinal juice
(D)All of these
Option – B
Q 25.: The structure which prevents the entry of food into respiratory tract is
(A) Larynx
(B) Glottis
(C) Pharynx
(D) Epiglottis
Option – D
Q 26.: The breakdown of pyruvate to give CO2, H2O and energy takes place in
(A) Cytoplasm
(B) Mitochondria
(C) Nucleus
(D) Chloroplast
Option – B
Q 27.: Phagocytosis is carried out by
(A) RBCs
(B) WBCs
(C) Platelets
(D) All of these
Option – B
Q 28.: Under normal conditions which one is completely reabsorbed in the renal tubules?
(A) Urea
(B) Uric acid
(C) Salts
(D) Glucose
Option – D
Q 29.: In which of the following groups organisms, food materials are broken down outside the body and absorbed?
(A)Mushroom, green plants, Amoeba
(B) Yeast, Mushroom, Bread mold
(C) Paramecium, Amoeba, Cuscuta
(D) Cuscuta, lice, tapeworm
Option – B
Q 30.:The contraction and expansion movement of the walls of the food pipe is called:
(A) Translocation
(B) Transpiration
(C) Peristaltic movement
(D) Digestion
Option – C
Q 31.: 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
Option – C
Q 32.: The respiratory pigment in human being is:
(A) Carotene
(B) Chlorophyll
(C) Haemoglobin
(D) Mitochondria
Option – C
Q 33.: 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 bronchi.
(D) Thickening of the artery walls of the lungs.
Option – A
Q 34.: The opening and closing of the stomatal pore depends upon
(A) Oxygen
(B) Temperature
(C) Water in the guard cells
(D) Concentration of CO2
Option – C
Q 35.: A plant gets rid of excess water through transpiration. Which is a method used by plants to get rid of solid waste products?
(A) Shortening of stem
(B) Dropping down of fruits
(C) Shedding of yellow leaves
(D) Expansion of roots into the soil
Option – C
Q 36.: Chemical 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
Option – B
Q 37.: 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 gut
(C) That releases juices for fat breakdown
(D) Which helps in mixing food with digestive juices
Option – A
Q 38.: What is the importance of the urinary bladder 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.
Option – C
Q 39.: What is percentage of the oxygen in the expired air when a person is resting ?
(A) 12%
(B) 16%
(C) 20%
(D) 24%
Option – B