Biology and Physics MCQs

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Questions and Answers

Which organelle is known as the powerhouse of the cell?

  • Lysosome
  • Ribosome
  • Mitochondria (correct)
  • Nucleus

During photosynthesis, which gas is released into the atmosphere?

  • Carbon dioxide
  • Hydrogen
  • Oxygen (correct)
  • Nitrogen

What is the functional and structural unit of the kidney?

  • Nephron (correct)
  • Villi
  • Alveoli
  • Neuron

Which vitamin is essential for blood clotting?

<p>Vitamin K (C)</p> Signup and view all the answers

Which part of the brain primarily controls voluntary actions?

<p>Cerebrum (B)</p> Signup and view all the answers

What is the SI unit of force?

<p>Newton (B)</p> Signup and view all the answers

Which of the following is a scalar quantity?

<p>Work (A)</p> Signup and view all the answers

What is the term for the ability of a body to resist changes in its state of motion?

<p>Inertia (D)</p> Signup and view all the answers

Which formula represents kinetic energy?

<p>$ rac{1}{2}mv^2$ (A)</p> Signup and view all the answers

What is the approximate acceleration due to gravity on the Earth's surface?

<p>9.8 m/s² (A)</p> Signup and view all the answers

Flashcards

Mitochondria

The powerhouse of the cell, responsible for energy production through cellular respiration.

Oxygen

A gas released by plants during photosynthesis, essential for respiration in many organisms.

Nephron

The functional and structural unit of the kidney, responsible for filtering blood and producing urine.

Vitamin K

A vitamin essential for blood clotting, helping to prevent excessive bleeding.

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Cerebrum

The largest part of the brain, responsible for voluntary actions, thought, and memory.

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Newton

The SI unit of force, representing the amount of force required to accelerate a 1 kg mass at 1 m/s².

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Work

A scalar quantity representing the energy transferred when a force causes displacement.

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Inertia

The tendency of an object to resist changes in its state of motion.

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Kinetic Energy Formula

The energy possessed by an object due to its motion, calculated as 1/2 * mass * velocity².

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Earth's Gravity

The acceleration due to gravity on Earth's surface, approximately 9.8 m/s².

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Study Notes

  • The following are multiple-choice questions (MCQs) and answers in the areas of Biology and Physics

Biology MCQs

  • The powerhouse of the cell is the Mitochondria
  • Oxygen is released during photosynthesis
  • The functional and structural unit of the kidney is the Nephron
  • Vitamin K helps in blood clotting
  • The Cerebrum controls voluntary actions

Physics MCQs

  • The SI unit of force is the Newton
  • Work is a scalar quantity
  • Inertia is the ability of a body to resist changes in its state of motion
  • Kinetic energy is calculated using the formula ½ mv²
  • The acceleration due to gravity on the surface of the Earth is 9.8 m/s²

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