Which is NOT an essential property of the genetic material?

The genetic material must be a DNA double helix.

Explanation:

Genetic material is the material which resides in the nucleus or any other organelles within the cell which is responsible for development of traits in an organism. It is a hereditary material which passes from parents to their offsprings. It is not necessary the genetic material must be stored in the form of double stranded DNA instead it can be stored in the form of RNA which is single stranded genetic material it directly encodes for proteins during translation.

lysosome is this part of the cell is surrounded by a very thick outer membrane to protect the rest of the cell from its strong enzymes.

substitution is the answer in this case