CBSE Class 10 Biology Life Processes MCQs Set B

Answer : C

Question. Products of anaerobic respiration in muscles are
(a) Lactic acid and energy
(b) Lactic acid, carbon dioxide and energy
(c) Lactic acid, water, carbon dioxide and energy
(d) Lactic acid, water and energy

Answer : A

Question. Select the statement that is true about respiration
(i) During inhalation, ribs move inward and diaphragm is raised
(ii) In the alveoli, exchange of gases takes place, (i.e.,) oxygen from alveolar air diffuses into blood and carbon dioxide from blood into alveolar air
(iii) Haemoglobin has greater affinity for carbon dioxide than oxygen
(iv) Alveoli increase surface area for exchange of gases
(a) and (iv)
(b) and (iii)
(c) and (iii)
(d) and (iv)

Answer : D

Question. The exit of unabsorbed food material is regulated by
(a) Pyloric sphincter
(b) Anus
(c) Small intestine
(d) Anal sphincter

Answer : D

Question. Tissue fluid is also called as
(a) Blood
(b) Plasma
(c) Lymph
(d) Water

Answer : C

Question. A gland not associated with the alimentary canal is
(a) Liver
(b) Salivary glands
(c) Pancreas
(d) Adrenal

Answer : D

Question. Which part of digestive system secretes peritrophic membrane around food in cockroach ? 
(a) Crop
(b) Gizzard
(c) Hepatic caeca
(d) mesenteron

Answer : B

Question. The procedure used in artificial kidney in place of normal is called :- 
(a) Pace maker
(b) Electrocardiograph
(c) Osmoregulation
(d) Dialysis

Answer : D

Question. Beri-beri is caused by the deficiency of 
(a) B₁ (thiamine)
(b) B₂ (riboflavine)
(c) B₆ (pyridoxine)
(d) B₁₂ (cobalamin).

Answer : A

Question. The larget size of heart is found in :- 
(a) Elephant
(b) Giraffe
(c) Crocodile
(d) Lion

Answer : B

Question. The cup shaped upper end of nephron is called :- 
(a) Bowman's capsule
(b) Glomerulus
(c) Nephrostome
(d) Nephridiopore

Answer : A

Question. Trypsinogen is converted to active trypsin by :- 
(a) Enterocrinin
(b) Secretin
(c) Enterokinase
(d) Pancreozymin

Answer : C

Question. The largest quantity of air that can be expired after a maximal inspiratory effort is :- 
(a) Residual volume
(b) Tidal volume
(c) Vital capacity of lungs
(d) Lung volume

Answer : C

Question. In hydra the digestion of food is 
(a) extra cellular
(b) intra cellular and extra cellular
(c) intercellular
(d) None of these

Answer : B

Question. Heart beat originates from :- 
(a) Left atrium
(b) Right ventricle
(c) Pacemaker
(d) Cadiac muscles

Answer : C

Question. Bilirubin and biliverdin are :- 
(a) Bile salts
(b) Bile pigments
(c) Enzymes
(d) None of these

Answer : B

Question. If we take food rich in lime juice, then :- 
(a) Action of ptyalin on starch is enhanced
(b) Action of ptyalin on starch is reduced
(c) Action of ptyalin on starch is unaffected
(d) Action of ptyalin on starch stops

Answer : B

Question. Xerophthalmia is caused by the deficiency of vitamin :- 
(a) E
(b) D
(c) B
(d) A

Answer : D

Question. Vitamin A is necessary for the synthesis of 
(a) haemoglobin
(b) rhodopsin (visual purple)
(c) melanin
(d) mitochondria.

Answer : B

Question. Water is mainly absorbed in :- 
(a) Colon
(b) Stomach
(c) Oesophagus
(d) Small intestine

Answer : D

Question. Chylomicrons are :- 
(a) Undigested proteins
(b) Undigested carbohydrates
(c) Fat droplets coated with phospholipids
(d) Fats droplets coated with glycoproteins

Answer : D

Question. Beri-Beri is caused by deficiency of vitamin :- 
(a) B₁
(b) B₂
(c) C
(d) E

Answer : A

Question. The major part of the plasma of blood consists of :- 
(a) neurons
(b) water
(c) red blood cells
(d) white blood cells

Answer : B

Question. During light reaction, the photosynthetic pigments absorb light energy in the form of :- 
(a) Electrons
(b) Protons
(c) Neutrons
(d) Photons

Answer : D

Question. Which of the following cells of pancreas produce insulin? 
(a) α cells
(b) B cells
(c) β cells
(d) T cells

Answer : C

Question. Digestion within a digestive tract is 
(a) incomplete
(b) extracellular
(c) the same as absorption
(d) an irreversible process

Answer : B

Question. During cellular respiration one molecule of glucose is first broken down into two molecules of
(a) Acetic acid
(b) Pyruvic acid
(c) Lactic acid
(d) None of the above

Answer : B

Question. 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

Answer : B

Question. The part of an alimentary canal receives bile from the liver is
(a) Stomach
(b) Small intestine
(c) Large intestine
(d) Oesophagus

Answer : B

Question. During deficiency of oxygen in tissues of human beings, pyruvic acid is converted into lactic acid in the
(a) Cytoplasm
(b) Chloroplast
(c) Mitochondria
(d) Golgi body

Answer : A

Question. The correct sequence of anaerobic reactions in yeast is
(a) Glucose ^Cytoplasm → Pyruvate ^Mitochondria → Ethanol + Carbon dioxide
(b) Glucose ^Cytoplasm → Pyruvate ^Cytoplasm → Lactic acid
(c) Glucose ^Cytoplasm → Pyruvate ^Mitochondria → Lactic acid
(d) Glucose ^Cytoplasm → Pyruvate ^Cytoplasm → Ethanol + Carbon dioxide

Answer : D

Question. The vessels which carry blood away from heart to various organs of body
(a) Veins
(b) Arteries
(c) Capillaries
(d) Platelets

Answer : B

Question. Respiratory pigment in human body is
(a) Chlorophyll
(b) Water
(c) Blood
(d) Haemoglobin

Answer : D

Question. Single circulation (i.e.,) blood flows through the heart only once during one cycle of passage through the body, is exhibited by
(a) Labeo, Chameleon, Salamander
(b) Hippocampus, Exocoetus, Anabas
(c) Hyla, Rana, Draco
(d) Whale, Dolphin, Turtle

Answer : B

Question. Respiration is a process in which
(a) Energy is stored in the form of ATP
(b) Energy is released and stored in the form of ATP
(c) Energy is used up
(d) Energy is not released at all

Answer : B

Question. The excretory organ present in earthworm through which excretion takes place
(a) Moist Skin
(b) Nephridia
(c) Both A and B
(d) Only B

Answer : C

Question. The organism that can live without oxygen of air is
(a) Amoeba
(b) Sheep
(c) Yeast
(d) Leech

Answer : C

Question. When ATP is brokendown using water, energy is released which is equivalent to
(a) 60.5 KJ/mol
(b) 30.5 KJ/mol
(c) 36.5 KJ/mol
(d) None of these

Answer : B

Question. One cell thick blood vessels are called
(a) Arteries
(b) Veins
(c) Capillaries
(d) Pulmonary artery

Answer : C

Question. The xylem in plants are responsible for
(a) Transport of water
(b) Transport of food
(c) Transport of amino acids
(d) Transport of oxygen

Answer : A

Question. Cell organelle in which respiration occurs is
(a) Chloroplast
(b) Mitochondria
(c) Golgi body
(d) Lysosome

Answer : B