The SI unit of force is:
Correct answer: B
Force is measured in newtons.
General Science
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The SI unit of work is:
Correct answer: B
Work is measured in joules.
The SI unit of power is:
Correct answer: B
Power is measured in watts.
Which particle has a negative charge?
Correct answer: D
Electrons carry negative electric charge.
Which particle has no electric charge?
Correct answer: B
Neutrons are electrically neutral.
The pH of a neutral solution at 25°C is approximately:
Correct answer: B
Neutral water has a pH close to 7 at 25°C.
The chemical symbol for sodium is:
Correct answer: D
Na comes from the Latin name natrium.
The chemical symbol for potassium is:
Correct answer: D
K comes from the Latin name kalium.
The most abundant gas in Earth's atmosphere is:
Correct answer: B
Nitrogen makes up about 78% of dry air.
The basic unit of life is the:
Correct answer: B
The cell is the basic structural and functional unit of life.
The functional unit of the kidney is the:
Correct answer: C
The nephron is the functional unit of the kidney.
Photosynthesis mainly occurs in the:
Correct answer: B
Chloroplasts are the main site of photosynthesis.
DNA stands for:
Correct answer: C
DNA stands for deoxyribonucleic acid.
Vitamin C deficiency causes:
Correct answer: A
Scurvy is caused by vitamin C deficiency.
Vitamin D deficiency can cause:
Correct answer: A
Vitamin D deficiency can cause rickets.
The largest organ of the human body is the:
Correct answer: B
Skin is the largest human organ by surface area.
Insulin is produced by the:
Correct answer: B
Insulin is produced by beta cells in the pancreatic islets.
Red blood cells mainly transport:
Correct answer: D
Hemoglobin in red blood cells transports oxygen.
The speed of light in vacuum is approximately:
Correct answer: B
Light travels in vacuum at approximately 3 × 10^8 m/s.
Which organ pumps blood through the body?
Correct answer: A
The heart pumps blood through the circulatory system.
Choose the correct answer: the SI unit of force is:
Correct answer: B
Force is measured in newtons.
Select the best answer: the SI unit of work is:
Correct answer: B
Work is measured in joules.
Which option is correct? the SI unit of power is:
Correct answer: D
Power is measured in watts.
Identify the correct answer: which particle has a negative charge?
Correct answer: C
Electrons carry negative electric charge.
For competitive-exam preparation, answer: which particle has no electric charge?
Correct answer: C
Neutrons are electrically neutral.