Microbiology Fundamentals: A Clinical Approach
Microbiology Fundamentals: A Clinical Approach
3rd Edition
ISBN: 9781259709227
Author: Marjorie Kelly Cowan Professor, Heidi Smith
Publisher: McGraw-Hill Education
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Chapter 4, Problem 1Q

Mitochondria likely originated from

  1. a. archaea.
  2. b. invagination of the cell membrane.
  3. c. bacteria.
  4. d. chloroplasts.
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Summary Introduction

Introduction:

Mitochondria are the powerhouse of the cell which provides energy for all the cellular activities. Mitochondria are bounded by two membranes: the inner and outer membrane. Space between the two membranes is called the intermembrane compartment and space is filled with fluid is called the mitochondrial matrix.

Answer to Problem 1Q

Correct answer:

Mitochondria are believed to have originated from bacteria. Therefore, option (c) is correct.

Option (c) is given as “bacteria”.

Explanation of Solution

Justify the reason for the correct statement:

The bacteria, archaea,and eukaryotes all have evolved from different kind of cells. The precursor of eukaryotes and prokaryotes is known as “Last common ancestor” (LCA). Theory of endosymbiosis explains that a bacterial cell engulfed the descendent cell of LCA (pre eukaryotic) and became the permanent part of LCA cell serving as mitochondria. Later with time, this association gave rise to the formation of the first eukaryotic cell.

Hence, option (c) is correct.

Justify the reasons for the incorrect statements:

Option (a) is given as “archaea”.

Mitochondria did not originate from archaea. Archaea, bacteria and pre eukaryotic cells developed from the last common ancestor way before mitochondria were formed. Hence, it is a wrong answer.

Option (b) is given as “invagination of the cell membrane”.

Mitochondria did not originate from invagination of membranes. Mitochondria originated from association of pre eukaryotic and bacterial cell. Hence, it is a wrong answer.

Option (d) is given as “chloroplasts”.

Chloroplast and mitochondria are believed to have evolved by the endosymbiosis. The theory of endosymbiosis explains that some of the eukaryotic cell organelles were generated by the symbiosis between pre eukaryotic and bacterial cells. Hence, it is a wrong answer.

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

Conclusion

Mitochondria is likely to have originated from the bacterial cell association with the pre eukaryotic cell.

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Students have asked these similar questions
Mitochondria likely originated froma. archaea.b. invaginations of the cell membrane.c. bacteria.d. chloroplasts
For each of the following indicate if they evolved once, twice, or perhaps several times. a) acquisition of mitochondria b) acquisition of chloroplast c) multicellularity            d) origin of ribosomes
a) Describe some characteristics and differences between prokaryotic and eukaryotic cells.b) How do the three domains of life differ from one another?c) Two of the organelles in eukaryotes, the mitochondrion and the chloroplast are believed to haveoriginated through a process of symbiosis. Discuss some of the theories of the origins ofmitochondria and chloroplasts

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Microbiology Fundamentals: A Clinical Approach

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Endosymbiotic Theory; Author: Amoeba Sisters;https://www.youtube.com/watch?v=FGnS-Xk0ZqU;License: Standard Youtube License