CBSE Class 10 Biology Life Processes MCQs Set D

Answer : B

Question. The process of an artificial kidney that is used to remove nitrogenous waste products from blood is called
(a) Excretion
(b) Dialysis
(c) Filtration
(d) Absorption

Answer : B

Question. Normal blood pressure (Systolic / Diastoli(c) is
(a) 120/80 mm of Hg
(b) 160/80 mm of Hg
(c) 120/60 mm of Hg
(d) 180/80 mm of Hg

Answer : A

Question. The main function of the ureter is to
(a) Control the pressure of urine in urinary bladder
(b) Take urine from kidneys to urinary bladder
(c) Filter blood and remove it to urine
(d) Connect the parts of excretory system

Answer : B

Question. When air is blown from mouth into a test tube containing lime water, the lime water turns milky due to the presence of
(a) Oxygen
(b) Carbon dioxide
(c) Nitrogen
(d) Water vapour

Answer : B

Question. After wound or cut in a body blood coagulates through
(a) WBC
(b) RBC
(c) Platelets
(d) Plasma

Answer : C

Question. The chemical required to show that CO₂ gas is released during respiration is
(a) Potassium bicarbonate
(b) Potassium dichromate
(c) Potassium permanganate
(d) Potassium hydroxide 

Answer : D

Question. The sphincter muscles that help in regulating the exit of food from stomach into the small intestine is
(a) Pyloric sphincter
(b) Ileocecal sphincter
(c) Cardiac sphincter
(d) Anal sphincter

Answer : A

Question. Blood from the superior vena cava flows into
(a) Right atrium
(b) Right ventricle
(c) Left atrium
(d) Left ventricle

Answer : A

Question. The correct pathway of blood in circulatory system is
(a) Atria → Ventricles → Arteries → Veins
(b) Ventricles → Atria → Veins → Arteries
(c) Ventricles → Veins → Arteries → Atria
(d) Veins → Ventricles → Atria → Arteries

Answer : A

Question. A large quantity of one of the following is removed from our body by lungs
(a) CO₂ and H₂O
(b) CO₂ only
(c) H₂O only
(d) Ammonia

Answer : A

Question. Villi present on the inner lining of the intestinal wall
(a) Secretes enzymes for digestion
(b) Secretes hormones
(c) Decreases the surface area for absorption
(d) Increases the surface area for absorption

Answer : D

Question. The force that blood exerts against the wall of a vessel is called
(a) Systolic pressure
(b) Diastolic pressure
(c) Blood pressure
(d) None of these

Answer : C

Question. In normal expiration, the diaphragm is
(a) Arched
(b) Flattened
(c) Perforated
(d) None of the above

Answer : A

Question. The backflow of blood inside the heart during contraction will b prevented by
(a) Valves in heart
(b) Thick muscular walls of ventricles
(c) Thin walls of atria
(d) All of the above

Answer : A

Question. The kidneys in human beings are a part of the system for
(a) Nutrition
(b) Respiration
(c) Excretion
(d) Transportation

Answer : C

Question. Book lungs are respiratory organs of :- 
(a) Scorpion
(b) Crustaceans
(c) Insects
(d) Centipedes

Answer: A

Question. Structure which prevents the entry of food in the wind pipe is :- 
(a) Pharynx
(b) Glottis
(c) Gullet
(d) Epiglottis

Answer: D

Question. During hibernation, frog respires by :- 
(a) Only skin
(b) Only lungs
(c) Only buccopharyngeal cavity
(d) Partly skin and partly lungs

Answer: A

Question. If the pancreatic duct is blocked an hour after one has taken his food, which one of the following will not be affected? 
(a) Carbohydrate digestion
(b) Neutralisation of chyme
(c) Breakdown of proteins
(d) Maintenance of normal blood sugar level

Answer: D

Question. The blood vascular system of mammals is known as double vascular system because :- 
(a) A group of veins carry oxygenated blood and other group conducts deoxygenated blood
(b) Oxygenated blood runs from heart to different organs by one set of veins, while deoxygenated blood runs from heart to lungs by another set
(c) Two different blood runs never meet
(d) All of these

Answer: D

Question. Painful breathing is called :- 
(a) Eupnoea
(b) Hypopnoea
(c) Apnoea
(d) Dyspnoea

Answer: D

Question. In Hydra and Amoeba, ammonia is the main nitrogenous waste. Lizards, snakes, birds and insects excrete mostly uric acid but crocodiles and alligators excrete mainly ammonia though they are reptiles. So can we generalise that :- 
(a) there is no uniform pattern of removal of nitrogen wastes
(b) aquatic and land animals excrete urea
(c) animals that fly excrete uric acid
(d) nitrogen waste excretion is closely related to the availability of water in the environment

Answer: D

Question. A patient suffering from hepatitis is advised to restrict the intake of fats and proteins and take carbohydrates only because 
(a) carbohydrates are easy to digest
(b) facts and proteins are not digested
(c) emulsification of fat and deamination are retarded
(d) Facts and proteins are complex substances.

Answer: C

Question. The opening of auricle into ventricle on the right side is guarded by :- 
(a) Tricuspid valve
(b) Semilunar valves
(c) Bicuspid valve
(d) Eustachius valve

Answer: A

Question. Urine leaves the kidney through :- 
(a) Urethra
(b) collecting duct
(c) renal vein
(d) ureter

Answer: D

Question. Principal inspiratory muscle is :- 
(a) External intercostal
(b) Internal intercostal
(c) Abdominal
(d) Phrenic

Answer: D

Question. The matrix of chloroplast is known as :- 
(a) Grana
(b) Stroma
(c) Thylakoid
(d) Lamellae

Answer: B

Question. How the transport of O₂ and CO₂ by blood occurs :- 
(a) With the help of RBCs and blood plasma
(b) With the help of RBCs and WBCs
(c) With the help of WBCs and blood serum
(d) With the help of platelets and corpuscles

Answer: A

Question. RBCs are generally destroyed in the liver, while WBCs are destroyed in :- 
(a) Plasma
(b) Lymph
(c) Inside various cells of body
(d) Outside the blood stream

Answer: D

Question. Cold blooded animals are those animals in which:- 
(a) blood is cold
(b) the temperature of the body varies according to the temperature of the surroundings
(c) body temperature always remains constant
(d) the body is cold to touch

Answer: B