Which of the following statements about DNA is/are correct?
1. DNA is the hereditary material of all living organisms.
2. All segments of DNA code for synthesis of proteins.
3. Nuclear DNA is double helical with two nucleotide chains which run anti-parallel.
4. DNA is also found in mitochondria.
Select the correct answer:

Solution (By Examveda Team)

Let's break down this question!

Statement 1: "DNA is the hereditary material of all living organisms."
This is TRUE. DNA carries the genetic instructions for nearly all living things.

Statement 2: "All segments of DNA code for synthesis of proteins."
This is FALSE. Only specific sections of DNA, called genes, code for proteins. Many other DNA segments have regulatory or structural roles.

Statement 3: "Nuclear DNA is double helical with two nucleotide chains which run anti-parallel."
This is TRUE. DNA in the nucleus has a double helix shape, and the two strands run in opposite directions (anti-parallel).

Statement 4: "DNA is also found in mitochondria."
This is TRUE. Mitochondria, the powerhouses of the cell, have their own DNA.

So, the correct statements are 1, 3, and 4.

Therefore, the answer is Option C: 1, 3 and 4.