Chapter 1, Problem 1MC

Which of the following microorganisms are not eukaryotic?

1. a. bacteria
2. b. yeasts
3. c. molds
4. d. protozoa

Summary Introduction

Introduction:

Any living organisms that are not visible by naked eyes are said to be microorganisms, such as bacteria, fungi, protozoa and viruses. These organisms are classified under two categorize: prokaryotic organisms and eukaryotic organisms. Prokaryotic organisms contain a cell wall but lack cell membrane bounded organelles. Eukaryotic organisms contain a cell wall as well as cell bounded organelles.

Answer to Problem 1MC

Correct answer:

Bacteria are not eukaryotic microorganism. Therefore, option (a) is correct.

Option (a) is given as “bacteria”.

Explanation of Solution

Justify reason for the correct statement:

Bacteria are prokaryotic organism that lacks cell bounded organelles such as the nucleus, and other organelles. Bacterial cell walls are made up of peptidoglycan layer but some bacteria like Mycoplasma lack cell walls.

Hence, option (a) is correct.

Justify reasons for the incorrect statements:

Option (b) is given as “yeasts”.

Yeasts are eukaryotic organisms. Hence, it is a wrong answer.

Option (c) is given as “Molds.”

Moulds are eukaryotic organisms. Hence, it is a wrong answer.

Option (d) is given as “protozoa”.

Protozoa are eukaryotic organisms. Hence, it is a wrong answer.

Hence, options (b), (c), and (d) are incorrect.

Conclusion

Bacteria are the prokaryotic organisms, not eukaryotic.