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Q1. The primary function of red blood cells is to:NEET 2026
Red blood cells contain haemoglobin, a protein that binds to oxygen in the lungs and releases it to tissues throughout the body.
Q2. Which of the following is a renewable resource?
A renewable resource is one that can be used repeatedly and is naturally replenished on a human timescale, like energy from the sun.
Q3. Coca alkaloids increase alertness by stimulating the:
Coca alkaloids, such as cocaine, are central nervous system stimulants. They work by increasing the levels of neurotransmitters like dopamine in the brain, leading to heightened alertness and euphoria.
Q4. Which planet in our solar system is known as the “Red Planet”?
Mars appears red because its surface is covered in iron oxide, or rust, which gives the landscape a reddish hue.
Q5. What is the chemical symbol for water?
The chemical formula H2O represents one oxygen atom covalently bonded to two hydrogen atoms.
Q6. In a simple series electrical circuit, if one light bulb burns out, what happens to the others?
In a series circuit, the current flows through a single path. If that path is broken by a burnt-out bulb, the current cannot flow to the other bulbs.