Question

Which of the following is NOT correct about Mitochondria?

• A. Genome size is 16569 base pairs
• B. The mitochondrial genome contains 37 genes that encode 13 proteins, 22 tRNAs, and 2 tRNAs
• C. Humans oocyte contains the highest number of mitochondria from 100,000 to 600,000 mitochondria per cell
• D. All humans have the same mitochondrial DNA

Hint:

Mitochondrial DNA: maternally inherited.
Size: 16,569 bp.
Contains 37 genes.
Varries between individuals (haplogroups).

Answer 1

The Correct Option is D

Step 1: Understanding the Concept:
Mitochondria have their own DNA.
Mitochondrial DNA has specific characteristics.

Step 2: Key Formula or Approach:
No specific formula.
Need to understand mitochondrial DNA.

Step 3: Detailed Explanation:
Mitochondrial genome size is 16,569 bp (A is correct).
It contains 37 genes: 13 proteins, 22 tRNAs, and 2 rRNAs (B is correct).
Human oocytes contain high numbers of mitochondria (C is correct).
Mitochondrial DNA is maternally inherited and can vary between individuals.
Not all humans have the same mitochondrial DNA (D is incorrect).
There are different haplogroups.

Step 4: Final Answer:
The statement "All humans have the same mitochondrial DNA" is NOT correct.
Hence, the correct option is (D).