The cell is the structural and functional unit of living organisms. It was discovered by Robert Hooke in 1665. Cell in Latin means “little room”. Many organisms, such as bacteria, protozoa and ...

Each organelle performs a specific function critical to the cell's survival (Table 1). Table 1. The structure and function of key eukaryotic cell structures. In animal cells, vacuoles are generally ...

The cell nucleus is the site of many important ... This produces a beads-on-a-string structure. This most basic unit of DNA can be further organized into a higher-order structure called chromatin.

As workhorses of the cell ... similar functions within the cell. Proteins from the same family also often have long stretches of similar amino acid sequences within their primary structure.

Yale researchers and their colleagues in Hungary have discovered that cells in the hypothalamus — an area of the brain that controls functions like hunger and body temperature — play a major role in ...

Table 1 below provides an overview of the key features of a prokaryotic cell: Table 1. The structure and function of key prokaryotic cell structures. Prokaryotes have ribosomes but they are smaller ...

In our bodies, there are trillions of cells. From white ... a right-handed double helix structure. A-DNA forms in a shorter, right-handed double helix. The function of this form is to protect ...