Mitochondria and chloroplast are

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Q.
Mitochondria and chloroplast are
(A) semi-autonomous organelles
(B) formed by division of pre-existing organelles and they contain DNA but lack protein synthesising machinery.

Which one of the following options is correct [2016]

1 (A) is true but (B) is false.

2 Both (A) and (B) are false.

3 Both (A) and (B) are correct.

4 (B) is true but (A) is false.

Ans.
(1)

Both mitochondria and chloroplast are semi-autonomous organelles. They have their own DNA which produces its own mRNA, tRNA and rRNA. These organelles also possess their own ribosomes and hence are able to synthesise some of their proteins.

Solution

Q.
Mitochondria and chloroplast are
(A) semi-autonomous organelles
(B) formed by division of pre-existing organelles and they contain DNA but lack protein synthesising machinery.

Which one of the following options is correct [2016]

1 (A) is true but (B) is false.

2 Both (A) and (B) are false.

3 Both (A) and (B) are correct.

4 (B) is true but (A) is false.

Ans.
(1)

Both mitochondria and chloroplast are semi-autonomous organelles. They have their own DNA which produces its own mRNA, tRNA and rRNA. These organelles also possess their own ribosomes and hence are able to synthesise some of their proteins.

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Solution

Q. Mitochondria and chloroplast are (A) semi-autonomous organelles (B) formed by division of pre-existing organelles and they contain DNA but lack protein synthesising machinery. Which one of the following options is correct [2016]

1 (A) is true but (B) is false.

2 Both (A) and (B) are false.

3 Both (A) and (B) are correct.

4 (B) is true but (A) is false.

Ans. (1) Both mitochondria and chloroplast are semi-autonomous organelles. They have their own DNA which produces its own mRNA, tRNA and rRNA. These organelles also possess their own ribosomes and hence are able to synthesise some of their proteins.

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Q.
Mitochondria and chloroplast are
(A) semi-autonomous organelles
(B) formed by division of pre-existing organelles and they contain DNA but lack protein synthesising machinery.

Which one of the following options is correct [2016]

Ans.
(1)

Both mitochondria and chloroplast are semi-autonomous organelles. They have their own DNA which produces its own mRNA, tRNA and rRNA. These organelles also possess their own ribosomes and hence are able to synthesise some of their proteins.