CBSE Class 10 Biology Life Processes Worksheet Set D

Question. A biochemical compound that readily combines with oxygen and distributes it throughout the human body is
(a) water
(b) urea
(c) haemoglobin
(d) acetylcholine

Answer : C

Question. The process in which loss of water takes place in the form of water vapour through stomata is called
(a) transportation
(b) transpiration
(c) guttation
(d) translocation

Answer : B

Question. In a closed circulatory system, blood is completely enclosed within
(a) vessels
(b) heart
(c) skeleton
(d) sinuses

Answer : B

Question. Which of the following are energy foods?
(a) Carbohydrates and fats
(b) Proteins and mineral salts
(c) Vitamins and minerals
(d) Water and roughage

Answer : A

True and False :

Question. Glomerulus acts as a dialysis bag. 
Answer: True

Question. Bowman’s capsule is found in heart. 
Answer: False

Question. Peristaltic movement of muscles occurs in the mouth to push food into alimentary canal. 
Answer: False

Question. Carbohydrates are the components of our food which is digested by an enzyme which is present in saliva as well as in pancreatic juice. 
Answer: True

Question. Cytoplasm are the sites of aerobic respiration in the cells.
Answer: False

Fill in the Blanks :

Question. The _____________ is where the respiratory and digestive passage come together.
Answer: pharynx

Question. The rate of breathing in _____________ animals in much faster than in _____________ animals.
Answer: aquatic, terriestial

Question. The conditions necessary for photosynthe-sis to take place are _____________ , _____________ , _____________ and _____________ .
Answer: sunlight, chlorophyll, carbon dioxide and water

Question. The expansion of an artery each time the blood is forced into it, is called _____________ .
Answer: pulse

Question. The exit of food from the stomach is regulated by a ………. muscle.
Answer: sphincter

Question. The actual exchange of gases takes place in the _____________ of the lungs.
Answer: alveoli

Question. _____________ are long, thin, spindle shaped cell with pits in their thick cell walls.
Answer: Tracheids

Question. The liqid part of blood is called _____________ .
Answer: plasma

Question. The process of breakdown of glucose, (a six-carbon molecule) into pyruvate, (a three-carbon molecule), takes place in the ………. .
Answer: cytoplasm

Question. Breaking of pyruvate using oxygen takes place in the ………. .
Answer: mitochondria

Question. Gums and resins are the _____________ products of plants.
Answer: waste 

Life Processes Assertion Reason Class 10 Science

A. Both assertion and reason are true, and reason is the correct explanation of assertion.
B. Both assertion and reason are true, but reason is not the correct explanation of assertion.
C. Assertion is true but reason is false.
D. Assertion is false and reason is true.

Question. Assertion : mammals and birds have four chambered heart .
Reason : mammals and birds are warm blooded.

Answer: A

Question. Assertion: Lypase helps in the digestion of proteins.
Reason : Digestion of proteins in small intestine needs basic medium.

Answer: D

Question. Assertion: At high altitudes the pressure of oxygen falls, inside lungs.
Reason: Oxygen is absorbed very quickly from alveoli to increase breathing.

Answer: A

Question. Assertion : Chyme is the food which enters into the intestine from stomach.
Reason : Chyme is acidic in nature.

Answer: A

Question. Assertion : During transpiration the evaporating water carries away heat energy.
Reason : Due to water loss the osmotic pressure inside leaves increases.

Answer: C

Question. Assertion: Herbivores have longer intestine to allow the cellulose to get digested.
Reason : Carnivores have shorter intestine to allow meat to get digested.

Answer: B

Question. Assertion: Tracheal cartilage is present in the throat.
Reason: The larynx plays an important role in human speech.

Answer: B

Question. Assertion : kidneys perform a dual function in our body.
Reason: selective reabsorption occurs in the glomerulus.

Answer: C

Question. Assertion : Anaerobic respiration requires more energy as compared to aerobic respiration.
Reason : Mitochondria is the power house of the cell.

Answer: D