biology MCQs – Page 57

Practise multiple-choice questions from biology for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

biology Mcqs
1121. Who is the father of Genetics?
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A. Robert Brown

B. Robert Hook

C. Gregor Mendel

D. Charless Darwin

1122. Hydra has no specialized excretory system because:
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A. It does not produce waste material

B. The whole body cells are in contact with water

C. Due to absence of mesoderm

D. It has pseudocoelom.

1123. which of the following gas discovered by Scheele?
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A. carbon dioxide

B. chlorine

C. oxygen

D. hydrogen

1124. Formation of heat shock proteins in plants results in___________?
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A. Embracing the enzymes and other proteins and prevent their denaturation.

B. Elevation of temperature in cold conditions.

C. Change the chemical nature of other proteins thus making them heat resistant.

D. Help in evaporative cooling.

1125. ___________ component of cell wall has grreat affinity with water?
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A. Lignin

B. Pectin

C. All of these

D. Cellulose

1126. They are considered to be the most primitive and are surely the first of the vertebrates?
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A. Reptiles

B. Jawless fishes

C. Amphibinas

D. Frogs

1127. Rich source of energy in seimen is__________?
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A. lactose

B. fructose

C. glucose

D. sacrose

1128. Which organisms are sometimes called the pastures of the sea?
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A. Diatoms

B. Dinoflagellates

C. Foraminiferans

D. Radiolarians

1129. Blood does not coagulate inside the body due to the presence of___________?
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A. Haemoglobin

B. Plasma

C. Fibrin

D. Heparin
1130. Earthworm lives in___________?
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A. moist soil

B. none of these

C. fresh water

D. sea water

1131. Which of the following endoplasmic reticulum has no ribosome on its surface?
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A. smooth

B. rough

C. all of above

D. both

1132. Which one of these structures involved in replication of bacterial dna?
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A. mesosome

B. pilli

C. chromosomes

D. plasmid

1133. Among the following organisms which shows the best adaptations for locomotion?
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A. Amoeba.

B. Amphibians.

C. Reptiles

D. Earthworm.

1134. Which one of these is a set of useful insects?
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A. Honeybee , lac insect, cochineal insect

B. Honeybee, silkmoth, tsetse fly

C. Sikmoth, honeybee, locust

D. Sandfly , butterfly, hoeybee

1135. Pressure flow theory was proposed by_________?
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A. Dixon

B. Vander wall.

C. H-Van Mohl

D. Earnst Munch
1136. The main nitrogenous waste formed in the body of earthworm is/are___________?
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A. Ammonia

B. Urea

C. Uric acid

D. Trimethylamine oxide

1137. Symbionts which help plants in uptake of phosphorous and trace metals such as zinc and copper.
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A. Bacteria

B. Cyanobacteria

C. Fungi

D. Viruses

1138. All insects have how many parts of legs?
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A. 3

B. 4

C. 2

D. 6

1139. Bats & humming birds belong to___________?
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A. Endotherms

B. Homeotherms

C. Ectotherms

D. Heterotherms
1140. How many vertebrae are present in lumbar region?
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A. 5

B. 12

C. 7

D. 4