Question

Choose the true statement(s) that support(s) the endosymbiotic theory. To be marked correct, you'll need to select all true statements, as there may be more than one correct answer. View Available Hint(s) Choose the true statement(s) that support(s) the endosymbiotic theory. To be marked correct, you'll need to select all true statements, as there may be more than one correct answer.
a.Many mitochondrial genes resemble proteobacteria genes, while the genes in the chloroplast resemble genes found in some photosynthetic bacteria.
b.Endosymbiotic theory describes the evolution of prokaryotes as a series of sequential cell-merging events between a eukaryotic ancestor and certain prokaryotes.
c.Mitochondria and chloroplasts both have their own circular DNA and 70S ribosomes that are similar to those found in bacteria.
d.Mitochondria and chloroplasts replicate by a process similar to mitosis.

Answer 1

Answer:

a.Many mitochondrial genes resemble proteobacteria genes, while the genes in the chloroplast resemble genes found in some photosynthetic bacteria.

c.Mitochondria and chloroplasts both have their own circular DNA and 70S ribosomes that are similar to those found in bacteria.

d.Mitochondria and chloroplasts replicate by a process similar to mitosis.

Explanation:

Endosymbiotic theory states that mitochondria and chloroplast which are organelles of eukaryotic cells were once independently living micro-organisms but with due course of time eukaryotic cells engulfed them and they become an integral part of these eukaryotic cells.

The resemblance between mitochondrial genes with those of proteobacteria and chloroplast genes with photosynthetic bacteria strongly support endosymbiotic theory. Apart from this, the presence of their own DNA that too circular just like prokaryotic microbes and 70 S ribosomes also support this theory. Also just like prokaryotic cells, before cell division mitochondria and chloroplasts undergo replication by means of a process known as binary fission.

Answer 2

Endosymbiotic theory states that mitochondria and chloroplast in eukaryotic cells were once aerobic bacteria which are also known as prokaryote. These bacteria are ingested by large anaerobic bacteria. Mitochondria and chloroplast are of same size as prokaryotic cells which divides by binary fission. They also have their own circular DNA.

The correct statements are :

a. Many mitochondrial genes resemble proteobacteria genes, while the genes in the chloroplast resemble genes found in some photosynthetic bacteria.

c. Mitochondria and chloroplasts both have their own circular DNA and 70S ribosomes that are similar to those found in bacteria.

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