Poor flexibility may be caused by muscle tightness.
Explanation: Muscle tightness refers to when the muscle is hard to move. This is usually accompanied with discomfort, cramp or pain. It happen whenever an individual’s muscle is tight or stiff.
Poor flexibility refers an individual inability to bend, twist and so on. Poor flexibility can cause muscle tightness when an individual cannot stretch his or her muscle. This cause pain to the individual.
The complete DNA instruction book, or genome, for a human contains about 3 billion bases and about 20,000 genes on 23 pairs of chromosomes
Because carbon atoms can form stable bonds with four other atoms, they are uniquely suited for the construction of complex molecules. These complex molecules are typically made up of chains and rings that contain hydrogen, oxygen, and nitrogen atoms, as well as carbon atoms.
In the nucleus of each cell, the DNA molecule is packaged into thread-like structures called chromosomes. Each chromosome is made up of DNA tightly coiled many times around proteins called histones that support its structure.
The gene is the basic physical and functional unit of heredity. It consists of a specific sequence of nucleotides at a given position on a given chromosome that codes for a specific protein (or, in some cases, an RNA molecule).
