Multiple choice

Yeast is a microscopic unicellular fungus that is used to make bread, wine and beer. Which among the following statements regarding yeasts is incorrect?

  1. Nutritional yeast is an excellent source of B-complex vitamins.

  2. Yeasts can also tolerate high concentrations of salt and heavy metals.

  3. The most common mode of vegetative growth in yeast is asexual reproduction by regeneration.

  4. Yeasts are chemoorganotrophs.

  5. Yeasts can generate electricity in microbial fuel cells.
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C Correct answer
Explanation

Yeasts, like all fungi, may have asexual and sexual reproductive cycles. The most common mode of vegetative growth in yeast is asexual reproduction by budding. Here, a small bud (also known as a bleb), or daughter cell, is formed on the parent cell.

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