A: Chloroplast is a semi-autonomous organelle | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(B) Chloroplasts are considered semi-autonomous organelles because they contain their own circular $DNA$ and $70S$ ribosomes,which allow them to synth

Vedclass · Accepted Answer

Assertion and Reason both are correct but Reason is not the correct explanation of Assertion.

Vedclass · Answer

(B) Chloroplasts are considered semi-autonomous organelles because they contain their own circular $DNA$ and $70S$ ribosomes,which allow them to synthesize some of their own proteins.The ribosomes found in chloroplasts are $70S$ type,whereas the ribosomes found in the cytoplasm of eukaryotic cells are $80S$ type.Since $70S$ ribosomes are smaller than $80S$ ribosomes,the Reason is correct.However,the fact that chloroplast ribosomes are smaller is not the reason why the chloroplast is semi-autonomous; rather,the presence of its own genetic material $(DNA)$ and protein-synthesizing machinery makes it semi-autonomous.Therefore,both statements are correct,but the Reason is not the correct explanation of the Assertion.

$A$: Chloroplast is a semi-autonomous organelle.
$R$: The ribosomes of the chloroplast are smaller than cytoplasmic ribosomes.

Similar Questions

Which cell organelles are found only in plants?

Which plastid is present in the mesophyll tissue of a leaf?

In the given figure,what do $a$ and $b$ represent respectively?

The number of chloroplasts in a mesophyll cell is:

Amyloplast is concerned with

Vedclass Test Series

Exam Paper Generator

Online Exam Module

$A$: Chloroplast is a semi-autonomous organelle.$R$: The ribosomes of the chloroplast are smaller than cytoplasmic ribosomes.