The invention of the common chemical element symbol notation system ($H, O, Ca$) used today was developed by whom? MCQ with Answer and Explanation

The invention of the common chemical element symbol notation system ($H, O, Ca$) used today was developed by whom?
A. Dmitri Mendeleev
B. Jöns Jacob Berzelius
C. Antoine Lavoisier
D. John Dalton
Answer: Option B
Solution (By JKSSB Mock Tests)
Berzelius introduced letter symbols based on Latin element names in 1813, replacing Dalton's cumbersome symbolic diagrams.

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Who discovered the presence of the Golgi apparatus within eukaryotic animal cells?
A. Robert Hooke
B. Theodor Schwann
C. Santiago Ramón y Cajal
D. Camillo Golgi

Correct Answer: Option D


Explanation:
Italian physician Camillo Golgi discovered the cellular organelle in 1898 using a unique silver staining procedure.

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Who discovered the antibiotic Streptomycin, the first effective cure for tuberculosis, winning a Nobel Prize in 1952?
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Correct Answer: Option B


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Selman Waksman discovered several antibiotics produced by soil microbes, including streptomycin.

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A. Kary Mullis
B. James Watson
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Correct Answer: Option C


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