Essential amino acids are amino acids that cannot be made by the body, and therefore must be obtained through eating cetain foods. (C)
The best answer is A.
The lytic cycle is considered the main cycle in viral replication. Once the viral DNA enters the cell, it transcribes itself into the host cell's messenger RNAs and uses them to direct the ribosomes.
The host cell's DNA is destroyed and the virus takes over the cell's metabolic activity and begins to use the cell's energy for its own propagation and within a short while, when the cell gets overcrowded with the viral progeny, the original virus releases enzymes to break the cell wall. The cell wall bursts. This process is called lysis. The new viruses are then released.
Concerning your heart, that's the circulatory system
Your lungs are the respritaory system
Answer:
The correct answer is option D. a cube.
Explanation:
Epithelium cells are type of cells that has a simple cuboidal epithelium that consists of only a single layer of cells that are cube-like or cuboidal in shape. In the question given cell is similar to these cells.
These cells have large, spherical nuclei present in the center. These cells are cube-shaped cells which support the option D to be correct.
Thus, the correct answer is option D. a cube.
