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Free download in PDF CBSE Class 10 Science Multiple Choice Questions(MCQs) with Answers. Here Gkseries provide Science Solve Questions and Answers for CBSE Class 10 Students.
61
The excretory unit of the human excretory system is known as:
[A]
Nephron
[B]
kidneys
[C]
Neuron
[D]
Nephridia
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
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
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
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
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
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
76
The number of pairs of nerves which arises from the spinal cord is:
[A]
31
[B]
51
[C]
21
[D]
41
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
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
79
The stimulus in the process of thigmotropism is:
[A]
Chemical
[B]
Gravity
[C]
Touch
[D]
Light
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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