It is a thing to memorise not to understand you have to learn all the names of scientists in your course for whatever they discovered...

Who coined the term enzyme?
The term "enzyme" was coined by a German physiologist named Wilhelm Kuhne in the year 1878. Kuhne was studying the digestive process and discovered a substance in saliva that had the ability to break down starch into simpler molecules. He named this substance "enzyme" from the Greek words "en", meaning "in", and "zyme", meaning "yeast" or "ferment". This term was chosen because enzymes were initially believed to be produced by living organisms such as yeast.
Details of the individuals mentioned:
Here are brief details about the individuals mentioned in the options:
- Pasteur: Louis Pasteur was a French chemist and microbiologist. While he made significant contributions to the field of microbiology and fermentation, he did not coin the term "enzyme".
- Buchner: Eduard Buchner was a German chemist who discovered that fermentation could occur in the absence of living cells, leading to the identification of enzymes as catalysts. However, he did not coin the term "enzyme".
- Kuhne: Wilhelm Kuhne was a German physiologist who coined the term "enzyme" in 1878. He made important contributions to the understanding of enzymes and their role in digestion.
- Summer: It is unclear who "Summer" refers to in this context. There is no prominent individual associated with the name "Summer" in relation to the term "enzyme".
Therefore, the correct answer is C: Kuhne.