Science Class 7th

101. The human body on the average has approximately ______ of blood.

A) 5 liters

B) 4 liters

C) 6 liters

D) 7 liters

102. Blood is mixture of red blood cells, white blood cells and platelets suspended in a pale yellow liquid called _________

A)  Plasma 

B) Oxygenated blood

C) Deoxygenated blood


103. Right atrium receives deoxygenated blood through the largest vein in the body called _______

A) Vena Cava

B) Arteries

C)  Both of them


104. The digested food is absorbed in the _________ from where it is transported to other parts by means of blood.

A) Small intestine

B) Large intestine

C) Both a & b


105. Carbon dioxide is transported through blood to the _____ for release from the body.

A) Lungs

B) Liver

C) Heart

106. ________ is a diet affected disorder, in which amount of sugar level in the blood of a person becomes too high.

A) Diabetes

B) Thalassemia

C) None of them

107. The amount of sugar in the blood is controlled by a hormone called ______

A) Insulin

B) Pancreatic juice

C) Bile juice


108. When food is digested and absorbed into the blood, the ______converts excess glucose into glycogen and is stored in the liver

A) Insulin

B) Pancreatic juice

C) Bile juice

109. If the insulin produced is insufficient or does not work properly, the sugar level in the blood ________, which result in diabetes.

A) Increases

B)  Decreased

C) None of them

110. To keeps the sugar level normal in the blood, the _______are given orally or insulin injections are injected.

A) Diabetes pills

B) Sleeping pills

C) Both a & b


111. __________ is a respiratory disease, in which air passages in the lungs are blocked or narrowed causing difficulty in breathing

A) Asthma

B) Heart problem

C) None of them


112. Asthma disease may be due to ________ such as pollens, spores, cold and pollution.

A) Genetic or environmental factors

B) Non-genetic or non-environmental factors

C) None of them

113. ______is necessary for formation of red blood cells which carry oxygen to the tissues.

A) Iron

B) Vitamin A

C) Vitamin B

114. Deficiency of iron in the body lowers the number of red blood cells in the blood and in turns supply of oxygen to the tissue is also lowered, this condition is known as _____

A) Anaemia

B) Asthma

C) Both a & b

115. A fatty substance called cholesterol can block the narrow blood vessels, this blockage is called_________

A) Thrombosis

B) Anaemia

C) Asthma

116. If the blockage is in the artery supplying blood to the heart, the heart stops beating which results in ___________

A) Heart attack

B) Thrombosis

C) None of them

117. __________is a method in which parts of tissue from an animal or plant are transferred to an artificial environment in which they can survive and function.

A) Tissue culture

B) Stem cells

C) None of them

118. _______ are the cells with the potential to develop into many different types of the cells in the body through cell division

A) Tissue culture

B) Stem cells

C) None of them

119. _______ are tissue made up of long tubes which transport the absorbed water and mineral salts from the roots through the stem to the leaves.

A) Xylem tissues

B) Phloem tissues

C) None of these

120. _______ are made up of long cells having pores, hence also known as sieve tube.

A) Xylem tissues

B) Phloem tissues

C) None of these