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Delhi Police Exam General Knowledge Study Material

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Science And Technology

Air bladder in fish acts as

a) Accessory respiratory organ
b) Hydrostatic organ
c) Both accessory respiratory organ and hydrostatic organ
d) Primary respiratory organ

✔Answer

✔Solution

Correct Answer Is : Both accessory respiratory organ and hydrostatic organ

Solution Is : Air bladder also known as swim bladder is an internal gas-filled organ that contributes to the ability of a fish to control its buoyancy (force exerted by a fluid that opposes an objects weight), and thus to stay at the current water depth without having to waster energy in swimming. It acts both as respiratory organ and hydrostatic organ.

Which one of the following gland is responsible for secretion of sex hormones?

a) Adrenal gland
b) Thyroid gland
c) Pituitary gland
d) Sebaceous gland

✔Answer

✔Solution

Correct Answer Is : Pituitary gland

Solution Is : Glands Funchion Pituitary Secretion of sex hormone Thyroid Produces Thyroxin Hormone Sebaceous Secretion of lipids (fats. Sterols, fat soluble vitamins)

In cauliflower plant, the useful part is

a) Underground stem
b) Root
c) Young inflorescence
d) Leaves

✔Answer

✔Solution

Correct Answer Is : Leaves

Solution Is : The anwser is `Leaves`

Total number of muscles present in out body is

a) 565
b) 656
c) 665
d) 556

✔Answer

✔Solution

Correct Answer Is : 656

Solution Is : The answer is `656`

Which of the plant products is used in leather industry?

a) Resin
b) Mucilage
c) Latex
d) Tannin

✔Answer

✔Solution

Correct Answer Is : Tannin

Solution Is : Tannin

The duration 19-21 days refers of

a) Incubation period of hen`s egg
b) Average life span of a red blood cell in humans
c) The period of menstural cycle soon after mensturation
d) Period of completion of one schizogony cycle of malarial

✔Answer

✔Solution

Correct Answer Is : Incubation period of hen`s egg

Solution Is : Incubation period of her`s egg

Longest cell in human body is

a) Muscle cell
b) Blood cell
c) Bone cells
d) Nerve cells

✔Answer

✔Solution

Correct Answer Is : Nerve cells

Solution Is : Nerve cell ( Neuron) is the longest cell in human body, with a length of 90 - 100 cm . It joints the Central Nervous System to other parts of the body .

Which part of the plant is used as `saffron` ?

a) Sepals
b) Petals
c) Stamens
d) Style and Stigma

✔Answer

✔Solution

Correct Answer Is : Style and Stigma

Solution Is : Saffron is a spice derived from the flower of crocus sativus , commonly known as the saffron crocus . The female part of the plant style and stigma are used as saffron .

Which enzyme is obtained from red gram ?

a) Urease
b) Zymase
c) Maltase
d) Diastase

✔Answer

✔Solution

Correct Answer Is : Diastase

Solution Is : Diastase enzyme is obtained from red gram. It catalyses the breakdown of Starch into Maltose

Grave`s disease is caused due to

a) Hyperactivity of Thymus
b) Hyperactivity of Thyroid
c) Hypoactivity of Thymus
d) Hypoactivity of Thyroid

✔Answer

✔Solution

Correct Answer Is : Hyperactivity of Thyroid

Solution Is : Grave`s disease is an autoimmune disease . It most commonly affects the thyroid frequently causing it to enlarge to twice its size or more , become overactive , with related hyperthyroid symptoms such as increased heartbeat , muscle weakness , disturbed sleep and irritability .

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Delhi Police Exam General Knowledge Study Material

Science And Technology

Air bladder in fish acts as

Correct Answer Is : Both accessory respiratory organ and hydrostatic organ

Which one of the following gland is responsible for secretion of sex hormones?

Correct Answer Is : Pituitary gland

Solution Is : Glands Funchion Pituitary Secretion of sex hormone Thyroid Produces Thyroxin Hormone Sebaceous Secretion of lipids (fats. Sterols, fat soluble vitamins)

In cauliflower plant, the useful part is

Correct Answer Is : Leaves

Solution Is : The anwser is `Leaves`

Total number of muscles present in out body is

Correct Answer Is : 656

Solution Is : The answer is `656`

Which of the plant products is used in leather industry?

Correct Answer Is : Tannin

Solution Is : Tannin

The duration 19-21 days refers of

Correct Answer Is : Incubation period of hen`s egg

Solution Is : Incubation period of her`s egg

Longest cell in human body is

Correct Answer Is : Nerve cells

Solution Is : Nerve cell ( Neuron) is the longest cell in human body, with a length of 90 - 100 cm . It joints the Central Nervous System to other parts of the body .

Which part of the plant is used as `saffron` ?

Correct Answer Is : Style and Stigma

Solution Is : Saffron is a spice derived from the flower of crocus sativus , commonly known as the saffron crocus . The female part of the plant style and stigma are used as saffron .

Which enzyme is obtained from red gram ?

Correct Answer Is : Diastase

Solution Is : Diastase enzyme is obtained from red gram. It catalyses the breakdown of Starch into Maltose

Grave`s disease is caused due to

Correct Answer Is : Hyperactivity of Thyroid

Solution Is : Grave`s disease is an autoimmune disease . It most commonly affects the thyroid frequently causing it to enlarge to twice its size or more , become overactive , with related hyperthyroid symptoms such as increased heartbeat , muscle weakness , disturbed sleep and irritability .

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