CBSE Class 10 Science Quiz | CBSE Class 10 Science Multiple Choice Questions(MCQs) with Answers

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Questions
61 The excretory unit of the human excretory system is known as:
A Nephron
B kidneys
C Neuron
D Nephridia

Answer: Nephron
62 Which among the following procedures is used for cleaning the blood of a person by separating the waste substance from it?
A Dialysis
B Hydrolysis
C Kidney transplant
D Blood transfusion

Answer: Dialysis
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63 The process of diffusion of solvent particles from the region of less solute concentration to a region of high solute concentration through semi-permeable membrane is known as
A Osmosis
B Transpiration
C Diffusion
D Translocation

Answer: Osmosis
64 Movement of the synthesized products from the leaves to the roots and other parts of a plant’s body takes place through the phloem. This process is known as:
A Excretion
B Translocation
C Transportation
D Transpiration

Answer: Translocation
65 The vein which brings clean blood from the lungs into the heart is known as:
A Pulmonary artery
B Superior vena cava
C Pulmonary vein
D Hepatic vein

Answer: Pulmonary vein
66 Which of the following help in protecting the inner lining of the stomach from the harmful effect of hydrochloric acid?
A Bile
B Mucus
C Pepsin
D Trypsin

Answer: Mucus
67 The enzymes contained in pancreatic juices help in the digestion of:
A Proteins, fats and carbohydrates
B Proteins and carbohydrates
C Fats and carbohydrates
D Proteins and fats

Answer: Proteins, fats and carbohydrates
68 Among the following choose the correct option which includes the organisms that have a holozoic mode of nutrition:
A Parakeet and Amoeba
B Paramecium and Parasite
C Plasmodium and Amoeba
D Paramecium and Plasmodium

Answer: Parakeet and Amoeba
69 The enzymes pepsin and trypsin are secreted respectively by
A Liver and salivary gland
B Stomach and pancreas
C Salivary gland and stomach
D Liver and pancreas

Answer: Stomach and pancreas
70 Electrical impulse travels in a neuron from:
A Dendrite → cell body → axon → axon end
B Axon end →axon → cell body → dendrite
C Dendrite → axon → axon end → cell body
D Cell body → dendrite → axon → axon end

Answer: Dendrite → cell body → axon → axon end
71 The dramatic changes in body features associated with puberty are mainly because of the secretions of:
A Testosterone from thyroid gland and estrogen from pituitary gland
B Testosterone from testes and estrogen from ovary
C Estrogen from testes and testosterone from ovary
D Estrogen from adrenal gland and testosterone from pituitary gland

Answer: Testosterone from testes and estrogen from ovary
72 A doctor advised a person to take injection of insulin because his:
A Blood sugar was high
B Thyroxine level in blood was high
C Blood pressure was high
D Heart beat was high

Answer: Blood sugar was high
73 Which of the following control and regulate the life process?
A Nervous and endocrine systems
B Endocrine and digestive systems
C Reproductive and endocrine systems
D Respiratory and nervous systems

Answer: Nervous and endocrine systems
74 Which of the following controls the involuntary actions in the body?
A Medulla in hindbrain
B Medulla in midbrain
C Medulla in forebrain
D Medulla in spinal cord

Answer: Medulla in hindbrain
75 Iodine is necessary for the synthesis of which of the following hormone?
A Thyroxine
B Insulin
C Adrenaline
D Auxin

Answer: Thyroxine
76 The number of pairs of nerves which arises from the spinal cord is:
A 31
B 51
C 21
D 41

Answer: 31
77 Dandelion flowers open the petals in bright light during the daytime but close the petals in dark at night. This response of dandelion flowers to light is called:
A Photonasty
B Chemotropism
C Phototropism
D Thigmonasty

Answer: Photonasty
78 A growing seedling is kept in a dark room. A burning lamp is placed near to it for a few days. The top part of seedling bends towards the burning candle. This is an example of:
A Phototropism
B Geotropism
C Chemotropism
D Hydrotropism

Answer: Phototropism
79 The stimulus in the process of thigmotropism is:
A Chemical
B Gravity
C Touch
D Light

Answer: Touch
80 The growth of tendrils in pea plants is due to the:
A Rapid cell division and elongation in tendril cells that are away from the support
B Rapid cell division and elongation in tendril cells in contact with the support
C Effect of gravity on the part of tendril hanging down towards the earth
D Effect of sunlight on the tendril cells facing the sun

Answer: Rapid cell division and elongation in tendril cells that are away from the support

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