Question

Which of the following are true in regards to mitochondrial DNA (mtDNA)?

1) It is found in the mitochondria of cells.
2) It is inherited only from the mother.
3) It contains genes responsible for energy production.
4) It is present in both plant and animal cells.

Answer 1

Mitochondrial DNA (mtDNA) is found in the mitochondria of cells, is inherited only from the mother, and contains genes responsible for energy production. However, it is not present in the same way in both plant and animal cells. All of the above is correct.

Step-by-step explanation:

Several statements are true in regards to mitochondrial DNA (mtDNA):

1. It is found in the mitochondria of cells. Mitochondria are organelles found in eukaryotic cells, and they contain their own DNA, known as mtDNA.
2. It is inherited only from the mother. During fertilization, the mitochondria and its DNA are passed down from the mother to the offspring.
3. It contains genes responsible for energy production. Mitochondrial DNA encodes for proteins involved in energy production through oxidative phosphorylation.
4. It is present in both plant and animal cells. While mitochondria are found in both plant and animal cells, their DNA is not present in the same way.