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1 BIOLOGY MCQS

A Cheetah can accelerate to 100 kmph in just __________.

  • 3 seconds
  • 6 seconds
  • 9 seconds
  • 12 seconds
Correct Answer: A. 3 seconds

Detailed Explanation

The cheetah (Acinonyx jubatus) holds the title of the fastest land animal on Earth. One of its most remarkable abilities is its acceleration. A cheetah can go from 0 to 100 kilometers per hour in just 3 seconds, a performance that rivals and even surpasses many modern sports cars. This incredible speed and acceleration are essential adaptations for survival in the wild, especially for hunting prey.


🔹 Why can cheetahs accelerate so fast?


Several biological adaptations make this possible:




  1. Muscular Build: Cheetahs have powerful, lean muscles that provide explosive bursts of energy.




  2. Flexible Spine: Their spine acts like a spring, allowing long strides of up to 7–8 meters per step.




  3. Large Nasal Passages & Lungs: These allow quick oxygen intake to fuel rapid movements.




  4. Non-retractable Claws: Unlike other cats, cheetahs have claws that act like spikes, improving grip on the ground.




  5. Long Tail: Works as a rudder, helping in sharp turns while chasing prey.




🔹 Speed vs. Duration




  • Top Speed: A cheetah can reach 100–120 km/h (60–75 mph).




  • Duration: They can only maintain this speed for about 20–30 seconds before overheating.




  • Distance: During a chase, they typically cover around 200–300 meters.




🔹 Hunting Strategy


Cheetahs rely on stealth and proximity. They quietly stalk prey such as gazelles or impalas until they are close enough (within 60–100 meters). Then, they launch a high-speed sprint, often bringing down prey within 30 seconds.


🔹 Comparison with Humans & Cars




  • A sports car like a Ferrari or Bugatti may take 2.5–3 seconds to reach 100 km/h, meaning the cheetah competes with machines built for speed.




  • The fastest human sprinter (Usain Bolt) reaches top speed of ~37 km/h, far slower than a cheetah.






✅ Key Points to Remember




  • Cheetah = fastest land animal.




  • Accelerates 0–100 km/h in 3 seconds.




  • Can maintain speed only for 20–30 seconds.




  • Adaptations: flexible spine, strong muscles, long tail, large lungs, non-retractable claws.




👉 Therefore, the correct answer is Option 1: 3 seconds.

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