Which of the following statements regarding the genetic material of cells and viruses is true? A. The genes of both viruses and
cells are enclosed within a nucleus. B. Viral genes may be encoded by DNA or RNA, but cellular genes are always encoded by DNA. C. The characteristics of cells are encoded in genes, but viruses do not have their own genes. D. The nucleotides found in cells are different from the nucleotides found in viruses.
Option B. Viral genes may be encoded by DNA or RNA, but cellular genes are always encoded by DNA.
Explanation:
Virus is a unique organism having unique characteristics which act as both living and non living. In cell, it is living while outside the cell it is present in crystalline form. Virus is composed of two genome i. e. DNA or RNA. But cell is composed of only DNA genome. There is no nucleus present in virus. Mitochondria and ribosome are also absent.
One of the side effects of smoking is the damage of cilia in the trachea
which allows particles to entre the lungs. Smoking destroys the cilia
which are key in keeping particles from getting down into your lungs so
every time a person smokes more and more cilia are destroyed.
Blood forms a spherical shape (perfect circular shape) almost immediately upon separating from the blood source. The spherical shape is caused by the surface tension of the blood. Surface Tension causes the blood drop to pull itself in; both horizontally and vertically.
