615 MCQ Questions in english

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615 MCQ Questions in english हिन्दी

391. Organic Substances that regulate growth and development in extremely small doses are referred to as

A. vitamins

B. hormones

C. enzymes

D. None of the above

390. The occurrence of spontaneous radioactive emission is known as

A. protons (alpha particles)

B. electrons (beta particles)

C. gamma rays (short wave electromagnetic waves)

D. All of the above

389. Dicot root and monocot root are different in that

A. open vascular bundles

B. scattered vascular bundles

C. well developed pith

D. radially arranged vascular bundles

388. Night blindness is caused by a lack of which vitamin?

A. Vitamin A

B. Vitamin B

C. Vitamin C

D. Vitamin D

387. Norepinephrine increases

A. blood pressure

B. saliva production

C. urine production

D. respiration

386. Pigmentation of the skin is due to

A. lymphocytes

B. monocytes

C. leucocytes

D. melanocytes

385. Which of the following plants was the subject of Gregor Mendel's famous experiment?

A. Gram

B. Wheat

C. Pea

D. Maize

384. Photosynthesis is a process

A. reductive and exergonic

B. reductive and catabolic

C. reductive, endergonic and catabolic

D. reductive, endergonic and anabolic

383. Osmosis is the process by which a semipermeable membrane allows a solution of higher concentration to flow into a solution of lower concentration. What about the statement is untrue?

A. Exact concentration of solution is not given

B. The flow of solution is not possible through semi permeable membrane

C. Character of semi permeable membrane is not given

D. All are incorrect

382. Plant sways toward the light source due to the curvature movement known as

A. geotropism

B. Thigmotropism

C. phototropism

D. chemotropism

381. Those vascular bundles that are radical are called

A. xylem and phloem occur on the different radii

B. xylem and phloem occur on the same radius

C. phloem is surrounded by xylem

D. xylem is surrounded by phloem

380. In an atomic explosion, a tremendous amount of energy is produced as a result of

A. Conversion of mechanical energy into nuclear energy

B. Conversion of neutrons into protons

C. Conversion of chemical energy into heat energy

D. Conversion of mass into energy

379. What separates isotopes is:

A. Sublimation

B. Crystallisation

C. Filtration

D. Distillation

378. X-rays have a wavelength in the range of

A. 1 cm

B. 10 micron

C. 1 angstrom

D. 1 m

377. There are mesons in

A. Gamma rays

B. Cosmic rays

C. Laser beam

D. X-rays

376. Which radioactive contaminant recently caught the attention of the public because it was found in construction materials?

A. Radium

B. Thorium

C. Radan

D. Plutonium

375. Using the nautical mile as a unit of measurement,

A. Road mile

B. Navigation

C. Measuring the boundaries of a nation

D. Astronomy

374. Which of the following is a unit of speed known as a knot?

A. Light waves

B. Ship

C. Aeroplane

D. Sound waves

373. Which of the following is utilised in nuclear reactors as a moderator?

A. Ordinary water

B. Thorium

C. Graphite

D. Radium

372. Which of the following is a radioactive element's positively charged particle?

A. Cathode ray

B. Gamma ray

C. Alpha ray

D. Beta ray

371. Atoms are made up of:

A. Protons only

B. Electrons and Nuclei

C. Electrons and protons

D. Electrons only

370. The unit for bars is

A. Heat

B. Temperature

C. Current

D. Atmospheric pressure

369. Which of the following gases undergoes decrease during the process?

A. Carbon

B. Oxygen

C. Helium

D. Hydrogen

368. Kilowatt is a measurement unit for:

A. Power

B. Work

C. Current

D. Electricity

367. Electric current can be detected using:

A. Ammeter

B. Commutator

C. Anemometer

D. Voltmeter

366. Using a chronometer, you can:

A. Water waves

B. Colour contrast

C. Sound waves

D. Time

365. Accurate measurements of very brief time periods are made via

A. Pulsars

B. Atomic clocks

C. Quartz clocks

D. White dwarfs

364. How many miles are in one kilometre?

A. 1.6

B. 0.84

C. 0.62

D. 0.5

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