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A Learning Portal from Recruitment India
A Learning Portal from Recruitment India
Radioactivity is a phenomenon of the spontaneous emission of
protons (alpha particles)
electrons (beta particles)
gamma rays (short wave electromagnetic waves)
All of the above
Answer with explanation
Answer: Option DExplanation
Spontaneous emission of radiation, either directly from unstable atomic nuclei or as a consequence of a nuclear reaction. The radiation, including alpha particles, nucleons, electrons, and gamma rays, emitted by a radioactive substance.
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Name the tissues that transports food to various parts of a plant.
Parenchyma
Xylem
Phloem
Sclerenchyma
Answer with explanation
Answer: Option CExplanation
Xylem and Phloem tissues are present throughout the plant. They begin at the root and then move up to the stem, branches, and leaves. The xylem tissue transports water and minerals from the roots to the leaves whereas the phloem tissue transports food from the leaves to the other parts of the plant.
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Which of the following is a poisonous fish?
killer whale
lion fish
goldfish
hammerhead shark
Answer with explanation
Answer: Option BExplanation
Lion fish are noted for their venomous fin spines, which are capable of producing painful, though rarely fatal, puncture wounds.
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Which disease is called “royal disease”?
Haemophilia
Deep Vein Thrombosis
Anemia
Answer with explanation
Answer: Option AExplanation
Heamophilia is called a “royal disease”. The haemophilia gene was transmitted from Queen Victoria (who became Queen of England in 1837) to the ruling families of Russia, Spain, and Germany. The gene for haemophilia in Queen Victoria was caused by spontaneous mutation. Haemophilia research began around 1900.
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Which of the following statement is/are correct about Enzyme?
An Enzyme is a protein and is used as a catalyst to accelerate the reaction.
Life would not exist without the presence of enzymes.
Enzymes participate in cellular metabolic processes.
All the above
Answer with explanation
Answer: Option DExplanation
Enzymes are proteins that act as catalysts within the living cells. They are composed of one or more long chains of interconnected amino acids. They accelerate chemical reactions. All chemical reactions that occur in living organism are dependent on catalytic actions of enzymes and therefore, known as Bio transformation. Life would not exist without the presence of enzymes.
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Which of the following statement is correct about Cerebellum?
It regulates the muscular movement for locomotion.
It is a part of brain.
Both A and B
Neither A nor B
Answer with explanation
Answer: Option CExplanation
Cerebellum consists of large mass having ridges and furrows, situated above and behind the medulla and attached to cerebrum. It regulates muscular movement for locomotion. It is a part of brain.
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In Human beings the process of digestion of food begins in:
Stomach
Food Pipe
Mouth
Small Intestine
Answer with explanation
Answer: Option CExplanation
Digestion of food starts as soon as we put food in our mouth. The mouth cavity contains teeth, tongue and salivary glands. The teeth cut the food into small pieces, chew and grind it. The teeth help in physical digestion. The salivary glands help in chemical digestion by secreting enzymes.
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Who had given the theory of evolution of species by natural selection?
Darwin
Mendel
Dalton
Morgan
Answer with explanation
Answer: Option AExplanation
Charles Robert Darwin gave the theory of evolution in his book “The Origin of Species”. The theory proposed by him is known as “The Theory of Natural Selection”.
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Photosynthesis is :
An Oxidation-Reduction reaction
Synthesis reaction
Organic reaction
Replacement reaction
Answer with explanation
Answer: Option AExplanation
Plants are autotrophs as they prepare their own food with the help of photosynthesis and also green in colour due to the pigment chlorophyll present in the leaves. With the help of questions we have understood the necessity of it and also the process involved in the preparation of food and releasing oxygen in the environment.
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What are those animals called which eat both plants and animals?
Omnivores
Herbivores
Carnivores
Decomposers
Answer with explanation
Answer: Option AExplanation
omnivore an animal that eats both plants and meat. An animal that only eats plants is called a herbivore and an animal that only eats meat is called a carnivore.
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