Answer:
The answer is double helix.
Explanation:
In its natural state, each DNA molecule is actually composed of two single strands held together along their length with hydrogen bonds between the bases. Watson and Crick proposed that the DNA is made up of two strands that are twisted around each other to form a right-handed helix, called a double helix.
Hope this helps!! ;)
Group of genes that are regulated together
Genes usually have related functions
E. coli <span>have cluster of 3 genes that must be turned on before it can use lactose as food</span>
One strand of DNA contains many proteins.
Habitat destruction is the cause of the loss of species because the organism have been deprived of their living requirements.