The first practical automatic dishwasher was invented and patented by which female innovator in 1886? MCQ with Answer and Explanation

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The first practical automatic dishwasher was invented and patented by which female innovator in 1886?

A. Mary Anderson

B. Grace Hopper

C. Josephine Cochrane

D. Stephanie Kwolek

Answer: Option C

Solution (By JKSSB Mock Tests)

Josephine Cochrane designed the first successful hand-powered mechanical dishwasher because she wanted to protect her fine china from chipping.

This question belongs to: Static General Knowledge Inventions and Discoveries

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Question #1

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Who discovered that certain types of mold produce enzymes that slice viral genetic strains, known as CRISPR-Cas9 genome editing?

A. Emmanuelle Charpentier and Jennifer Doudna

B. Kary Mullis

C. Alec Jeffreys

D. James Watson

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Correct Answer: Option A

Explanation:
Charpentier and Doudna adapted the bacterial immune mechanism into an exceptionally precise genetic engineering tool, winning the 2020 Nobel Prize.

This question belongs to: Static General Knowledge Inventions and Discoveries

Question #2

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Alexander Fleming discovered penicillin, the world's first effective antibiotic, in which year?

A. 1942

B. 1918

C. 1928

D. 1935

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Correct Answer: Option C

Explanation:
Sir Alexander Fleming discovered penicillin in 1928 at St. Mary's Hospital, London, after noticing a mold contaminating a petridish of staphylococci.

This question belongs to: Static General Knowledge Inventions and Discoveries