Question Detail

BIO 101 BIO 101 Past Questions Objective Question
Take CBT

Question

How are mitochondrial proteins encoded?
Options
A Mostly by nuclear DNA, some by mtDNA
Correct Answer
B Exclusively by mtDNA
C Exclusively by nuclear DNA
D By ribosomal RNA
Correct Answer

Option A is the correct answer.

Detailed Explanation

The vast majority (>99%) of mitochondrial proteins are encoded by nuclear DNA, synthesized on cytoplasmic ribosomes, and imported into the mitochondria. A small but crucial set (13 in humans) are encoded by the mitochondrial genome and synthesized within the organelle.

Hint

There's a division of labor between the nucleus and the mitochondrion.

Question Info

Course: BIO 101
Topic: BIO 101 Past Questions
Type: Objective
Difficulty: Not specified
Question 806 of 2556
Previous Course Details Next