Life Processes MCQ’s

Life Processes MCQ Class 10 chapter 6

Autotrophic Nutrition / Photosynthesis MCQ

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

• A. Glucose, Starch, Fructose
• B. Protein, Fats
• C. Carbon dioxide, water
• D. Hydrogen, Oxygen

Which foods among these give us energy:

(i) Carbohydrates & fats
(ii) Proteins & mineral salts
(iii) Vitamins & minerals
(iv) Water & roughage

Photosynthesis is:

• A. Trapping energy of sunlight to form glucose.
• B. Synthesis of photosensitive compounds.
• C. Oxidation of glucose
• D. Oxidation of carbon dioxide

The green pigment used in photosynthesis is

• A. Phytochrome
• B. Chlorophyll
• C. Hemoglobin
• D. None

Chlorophyll is mainly located in which part of the plant

• A. Green leaf
• B. Bark
• C. Stem
• D. Root

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

• A. Iron (Fe)
• B. Chromium (Cr)
• C. Magnesium (Mg)
• D. Carbon (C)

Chlorophyll pigment is located in which organelle of a cell?

• A. Mitochondria
• B. Vacuole
• C. Plastid
• D. Chloroplast

Apart from the plant which microorganism also do photosynthesis:

• A. Algae and cyanobacteria
• B. Fungi
• C. Paramecium
• D. Amoeba

Iodine solution turns potato into blue black in colour. This indicates that potato contains:

• A. Fats
• B. proteins
• C. Starch
• D. Glucose

Heterotrophic Nutrition MCQ

Mode of nutrition where an organism derives its food from the body of another living organism without killing it:

• A. Saprotrophic nutrition
• B. Parasitic nutrition
• C. Holozoic nutrition
• D. Autotrophic nutrition

Heterotrophic nutrition is

• A. The utilization of energy obtained by the plants.
• B. Breakdown of Glucose into energy
• C. Oxidation of Glucose
• D. All

Phagocytosis by amoeba is:

• A. Parasitic nutrition
• B. Holozoic nutrition
• C. Autotrophic nutrition
• D. Saprotrophic nutrition

Digestion of food in amoeba occurs in

• A. Nucleus
• B. Cytoplasm
• C. Food vacuole
• D. None

Human Digestive System MCQ

Saliva contains an enzyme which degrades starch into simple sugar. The enzyme is:

• A. Salivary Amylase
• B. Pepsin
• C. Trypsin
• D. None

The stomach produces acidic hydrochloric acid. Why

• A. Starch is broken down into simple glucose by it.
• B. To neutralize bases present in food.
• C. Pepsin needs an acidic medium to work upon proteins.
• D. None

Hydrochloric acid is secreted by

• A. Pancreas
• B. Small intestine
• C. Liver
• D. Gastric glands of the stomach

Difference between pepsin and trypsin is

• A. They work on different types of proteins
• B. They are secreted by different parts of the body viz. stomach, Pancrease respectively
• C. Trypsin do not need acidic environment unlike of pepsin
• D. All of the above

Bile juice is secreted by

• A. Stomach
• B. Saliva
• C. Liver
• D. None

Role of bile juice is

• A. Digestion of fat
• B. Emulsification of fat
• C. Digestion of starch
• D. None

An enzyme that degrades fats and oils into simpler fatty acid

• A. Lipase
• B. Cellulase
• C. Amylase
• D. Trypsin

Herbivores have longer small intestine than a carnivore.

• A. True
• B. False

Absorption of most nutritional substance takes place in:

A. Stomach
B. Small intestine
C. Large intestine
D. Oesophagus

The small intestine is coiled to increase the surface area. What benefit does it get from the high surface area?

• A. Microorganism gets killed due to longer passage.
• B. Increases the rate of absorption of food
• C. Both are true
• D. None

Cellulase enzyme in ruminant and termites breaks

• A. Cellulose
• B. Starch
• C. Glucose
• D. Protein

Function of large intestine is mainly

A. Absorption of water
B. Assimilation of food
C. Digestion of fats
D. Digestion of carbohydrates

Respiratory System MCQ

A pair of an organ meant for respiration is…

a. Heart b. Kidney c. Lung d. Stomach.

Trachea/windpipe contains ‘c’ shaped cartilaginous ring. The function of this ring is to…

a. Trap pathogen b. Prevent the collapse of trachea c. Trap Dust and mites d. None

Alveoli are made of … tissue.

a. Connective tissue b. Fibrous tissue c. Muscular d. Epithelial (squamous) tissue.

Part of the mouth which prevents the entry of food into the trachea while swallowing is…

a. Epiglottis b. Tongue c. Pharynx d. Larynx.

The voice box is…

a. Epiglottis b. Tongue c. Pharynx d. Larynx.

Pharynx opens into the esophagus while larynx opens into …

a. Trachea b. Nasal passage c. Blood Vessels d. None.

Blood vessels that supply alveoli are…

a. Pulmonary Artery b. Pulmonary vein c. Carotid artery d. Jugular vein.

The functional unit of a lung is…

a. Trachea b. Bronchus c. Bronchiole d. Alveolus.

Transportation MCQ

A human heart is situated in a cavity slightly right to the sternum. This cavity or notch is…

a. Pulmonary cavity b. Cardiac notch c. Buccal cavity d. None.

The human heart has four chambers. Two atria and two ____.

a. Ventricles b. Septum c. Vena cava d. None.

The right atrium receives deoxygenated blood while the left atrium receives…

a. Air b. Water c. Oxygenated blood d. Lymphatic fluid.

Cardiac tissue is an example of which type of tissue?

a. Muscular b. Nervous c. Glandular d. Connective.

How many times the human heartbeats in a minute?

a. 60 b. 72 c. 120 d. 108.

The duration of one complete cycle of heart is…

a. 0.8(60/72)  b. 1.0(60/60) c. 0.6(60/96) d. None.

The strongest chamber of the human heart is…

a. Lt. Atrium b. Lt. Ventricle c. Rt. Atrium d. Rt. ventricle.

The pressure inside a blood vessel in mm of Hg is:

a. 120/80 b. 180/120 c. 80/120 d. 120/90.

Arteries carry oxygenated blood. The only artery that carries deoxygenated blood is…

a. Carotid artery b. Pulmonary Artery c. Renal artery d. none.

Excretion MCQ

The major excretory organ is…

a. a pair of kidney b. a pair of lungs c. Spleen d. Liver.

The functional unit of a kidney is…

a. Glomerulus b. Nephron c. PCT d. DCT.

The number of nephrons (in million/10 lakh) in each kidney is…

a. 1 million b. 2-3 Million c. 5 million c. 10 million.

Do we find glucose in urine normally?

a. Always b. Never c. Only in case renal impairment d. Sometimes depending on intake.

See also: Life Processes Objective Questions.

Life Processes Notes.

For the detailed answer, see explained: Notes and questions on Life Processes.

Life Processes MCQ Miscellaneous questions

• Fungi have:

  (i) Parasitic nutrition
  (ii) Holozoic nutrition
  (iii) Autotrophic nutrition
  (iv) Saprotrophic nutrition

• Roots of a plant absorb water from the soil through :

  (i) diffusion
  (ii) transpiration
  (iii) osmosis
  (iv) None of these

• What saliva does?

  (i) Breaks down the complex starch into sugars.
  (ii) Breaks protein into amino acids.
  (iii) Absorption of vitamins.
  (iv) Break down of fats into fatty acids & glycerol.

• The contraction & expansion movement of the walls of the intestine is called:

  (i) translocation
  (ii) transpiration
  (iii) peristaltic movement
  (iv) digestion

• Egestion is regulated by

  (i) liver
  (ii) anus
  (iii) small intestine
  (iv) anal sphincter

• In plants Respiratory exchange of gases takes place through:

  (i) Lenticels
  (ii) Vacuoles
  (iii) Xylem
  (iv) Stomata

• water & minerals conducting tissue in the plant is:

  (i) Xylem
  (ii) Phloem
  (iii) Parenchyma
  (iv) Collenchyma

• Food tranporat through phloem tissue is called:

  (i) transpiration
  (ii) translocation
  (iii) respiration
  (iv) evaporation

• Permeable tissue which transport nutrition and oxygen to nearby cells is:

  (i) artery
  (ii) capillary
  (iii) Vein
  (iv) Haemoglobin

• Apart from blood there is another fluid which also circulate in our body. The fluid is:

  (i) Platelets
  (ii) RBC
  (iii) Lymph
  (iv) Plasma

• Single circulation is found in _ _ _ _ _ :

  (i) hyla, rana, draco
  (ii) whale, dolphin, turtle
  (iii) labeo, chameleon, salam&er
  (iv) hippocampus, exocoetus, anabas

• Name the tubethat connects the kidneys to the urinary bladder.

  (i) Urethra
  (ii) Nephron
  (iii) Tubule
  (iv) Ureter

• In kidneys Selective reabsorption of  glucose, amino acids, minerals & water into the blood takes place in:(i) Tubule
  (ii) Glomerulus
  (iii) Bowman’s capsule
  (iv) Ureter

• Oxygenation of impure blood occurs in:

  (i) Heart
  (ii) Lungs
  (iii) Ureter
  (iv) Kidneys

• artificial removal of urea from blood is termed:

  (i) osmosis
  (ii) filtration
  (iii) dialysis
  (iv) double circulation

• Passage of urine occur through:

  (i) Kidney → urinary bladder → urethra → ureter
  (ii) Urinary bladder → ureter → kidney → urethra
  (iii) Kidney → ureter → urethra → urinary bladder
  (iv) Kidney → ureter → urinary bladder → urethra

A gland not related with the digestion is

(i) liver
(ii) salivary glands
(iii) pancreas
(iv) adrenal

• Major place for protein digestion is

  (i) Stomach
  (ii) Small intestine
  (iii) Large intestine
  (iv) None

• • Which of the following part of the Digestive system do not carry digestion:

    (i) ileum
    (ii) stomach
    (iii) mouth
    (iv) esophagus

• • Yeast breaks glucose into:

    (i) alcohol, CO2 & 36 ATP
    (ii) CO2, H20 & 36 ATP
    (iii) alcohol, CO2 & 2ATP
    (iv) lactic acid, CO7 & 2 ATP

• • A large quantity of one is removed from our body by lungs:

    (i) CO2 & H20
    (ii) CO2 only
    (iii) CO only
    (iv) ammonia

• • In respiration, air passes through

    (i) Pharynx → nasal cavity → larynx → trachea bronchi → bronchioles
    (ii) Nasal cavity → pharynx → larynx → trachea → bronchi → bronchioles
    (iii) Larynx → nasal cavity’ → pharynx → trachea
    (iv) Larynx → pharynx trachea → lungs

• • A biochemical molecule of blood that combines with oxygen & helps in its transportation is

    (i) water
    (ii) urea
    (iii) haemoglobin
    (iv) acetylcholine

• • Loss of water in the form of water vapour through stomata is called

    (i) transportation
    (ii) transpiration
    (iii) guttation
    (iv) translocation

• • The closed circulatory system of humans is:

    (i) One way channel.
    (ii) Double Cyclic channel.
    (iii) Two-way channel.
    (iv) None.

• • Normal blood pressure (systolic/diastolic) is

    (i) 120/80 mm of Hg
    (ii) 160/80 mm of Hg
    (iii) 120/60 mm of Hg
    (iv) 180/80 mm of Hg

• • An instrument that measures blood pressure is:

    (i) barometer
    (ii) sphygmomanometer
    (iii) photometer
    (iv) manometer

• • Identify the false statement:

    (i) right atrium of the heart receive deoxygenated blood from the body.
    (ii) The excretion in flatworms occur through flame cells.
    (iii) A human kidney contain 1 million nephrons.
    (iv) Tracheids are nonliving conducting tissues.

• • Liver secrete bile through bile duct into:
    (i) Stomach
    (ii) Small intestine
    (iii) Large intestine
    (iv) Oesophagus

• • AIr turns lime water milky because lime reacts with _ _ _ _ (gas present in the air)

    (i) oxygen
    (ii) carbon dioxide
    (iii) nitrogen
    (iv) water vapor

• • Structural and functional unit of kidneys is:

    (i) ureter
    (ii) urethra
    (iii) neurons
    (iv) nephrons

• • Oxygen evolved during photosynthesis in a plant cell comes from

    (i) water
    (ii) chlorophyll
    (iii) carbon dioxide
    (iv) glucose

• • The opening & closing of the stomatal pore depends upon

    (i) oxygen
    (ii) temperature
    (iii) Turgour pressure in the guard cell.
    (iv) the concentration of CO2 in stomata

Check out other MCQs also:

MCQ Class 10

• Our Environment MCQ
• Sources of Energy MCQ
• Heredity and Evolution MCQ
• Chemical reactions and equations MCQ
• Life Processes MCQ
• Life Processes objective questions
• Control and Coordination MCQ
• How Do Organisms Reproduce MCQ

Life Processes MCQ Class 10 chapter 6

Ref: NCERT.