Tag: biology

Quizzes (1160) Questions (12174)

Questions Related to biology

Multiple choice microbiology: organisms in industry option b: biotechnology and bioinformatics biology

Who coined the term zymase for enzymes in Yeast?

  1. Buchner

  2. Kuhne

  3. Pasteur

  4. Sumner
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Zymase was found accidentally in yeast extract by Buchner in 1897. He prepared a yeast extract and added sugar solution to it. After sometime he noticed the alcohol formation in the extract which was a sign of fermentation which took in presence of enzyme. Zymase helps in the fermentation of sugar into ethanol and carbon dioxide. The sugar in the juice acted as substrate for the enzyme in the yeast cell. 
So, the correct answer is option A.
Multiple choice microbiology: organisms in industry option b: biotechnology and bioinformatics biology

Arrack is fermented

  1. Apple juice

  2. Toddy

  3. Cashewnut thalamus

  4. Grapes
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
Arrack is an alcoholic drink produced by distillation of fermented toddy. Toddy is an alcoholic drink produced from the sap of coconut flowers. The sap is fermented to produce toddy, a traditional drink in south India. Fermented toddy is then distilled to produce arrack. However, Arrack has been banned in India. It has refreshing effects but it is also toxic if consumed in excess amount. It has caused many deaths in different countries.
So, the correct answer is 'Toddy'. 
Multiple choice microbiology: organisms in industry option b: biotechnology and bioinformatics biology

Select the correct statement.

  1. Acetobacter aceti produces citric acid.

  2. Saccharomyces cerevisiae is used as clot buster.

  3. Penicillium notatum restricts the growth of Staphylococci

  4. Methanogens are found in aerobic conditions.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A)Acetobacter aceti produces acetic acid.

B)Saccharomyces cerevisiae is used as a producer of ethanol.
C)Penicillium notalum restricts the growth of Staphylococci.
D)Methanogens are found in aerobic conditions.
So the correct option is 'Penicillium notalum restricts the growth of Staphylococci'