Science MCQs
Science MCQs offer a general overview of multiple scientific disciplines such as physics, chemistry, and biology. These questions are ideal for students, job seekers, and competitive exam candidates looking to enhance their scientific knowledge. Whether you're preparing for SSC, HSSC, or general job tests, these MCQs provide a mix of theoretical and practical science questions. This category is particularly useful for testing concepts related to laws of motion, periodic table, cell structure, human anatomy, electricity, and more. The MCQs are curated to support concept building and revision. They also help in developing problem-solving abilities and logical analysis skills, which are crucial in science-based exams.
Q: Vitamin essential for blood clotting
A) Vitamin C
B) Vitamin A
C) Vitamin D
D) Vitamin K
✅ Correct Answer: D
Explanation: Vitamin K plays a vital role in synthesizing proteins needed for blood clotting.
Q: Invention associated with Alexander Fleming
A) Penicillin
B) Thermometer
C) X-ray
D) Vaccine
✅ Correct Answer: A
Explanation: Penicillin, the first true antibiotic, was discovered by Alexander Fleming.
Q: Planet known for having rings
A) Mars
B) Saturn
C) Venus
D) Earth
✅ Correct Answer: B
Explanation: Saturn is easily recognized due to its prominent ring system.
Q: Natural satellite of Earth
A) Moon
B) Mars
C) Sun
D) Venus
✅ Correct Answer: A
Explanation: Moon is Earth’s only natural satellite, reflecting sunlight at night.
Q: Organ where digestion begins
A) Small intestine
B) Liver
C) Stomach
D) Mouth
✅ Correct Answer: D
Explanation: Digestion starts in the mouth where enzymes in saliva begin breaking down food.
Q: Direction sound travels fastest
A) Gas
B) Solid
C) Vacuum
D) Liquid
✅ Correct Answer: B
Explanation: Sound moves fastest in solids due to tightly packed particles.
Q: Scientist who proposed the law of gravity
A) Einstein
B) Newton
C) Darwin
D) Galileo
✅ Correct Answer: B
Explanation: Isaac Newton formulated the law of universal gravitation.
Q: Human sense directly affected by olfactory nerves
A) Hearing
B) Vision
C) Smell
D) Touch
✅ Correct Answer: C
Explanation: The olfactory nerves detect and transmit smell signals to the brain.
Q: Process by which plants lose water vapor
A) Germination
B) Respiration
C) Photosynthesis
D) Transpiration
✅ Correct Answer: D
Explanation: Transpiration is the loss of water vapor from plant leaves through stomata.
Q: Planet nearest to the Sun
A) Mercury
B) Venus
C) Earth
D) Mars
✅ Correct Answer: A
Explanation: Mercury is the closest planet to the Sun in our solar system.