Which of the following family is linked with plant ashes?
Correct answer: B. Alkali metals
- A. Nitrogen family
- B. Alkali metals
- C. Rare earth metals
- D. Oxygen family
Explanation
The word potassium stems from the English "pot ash," which was used to isolate potassium salts. We get 'K' from the name kalium, given by the German chemist Martin Heinrich Klaproth, which stemmed from alkali, which stemmed from the Arabic al-qalyah, or "plant ashes."
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Proteins are classified by shape, composition and structure, from primary amino acid sequence to secondary, tertiary and quaternary organisation, and their biological roles are linked to this structure. Enzymes are examined as protein biocatalysts, including active sites, substrate specificity, activation energy, cofactors and factors affecting activity.
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