Cancer Cells

Cancer cells are cells that grow and divide at an unregulated, quickened pace. Although cancer cells can be quite common in a person they are only malignant when the other cells (particularly natural killer cells) fail to recognize and/or destroy them.

In the past a common belief was that cancer cells failed to be recognized and destroyed because of a weakness in the immune system. However, more recent research has shown that the failure to recognize cancer cells is caused by the lack of particular co-stimulated molecules that aid in the way antigens react with lymphocytes.

Cytoplasm

Cytoplasm is basically the substance that fills the cell. It is a jelly-like material that is eighty percent water and usually clears in color. It is more like a viscous (thick) gel than a watery substance, but it liquefies when shaken or stirred.

Cytoplasm, which can also be referred to as cytosol, means cell substance. This name is very fitting because cytoplasm is the substance of life that serves as a molecular soup in which all of the cell's organelles are suspended and held together by a fatty membrane. The cytoplasm is found inside the cell membrane and the cytoplasmic organelles.

Viruses

A virus is a small infectious agent that can replicate only inside the living cells of organisms. Most viruses are too small to be seen directly with a light microscope. Viruses infect all types of organisms, from animals and plants to bacteria and Archaea.

Although there are millions of different types. Viruses are found in almost every ecosystem on Earth and are the most abundant type of biological entity. The study of viruses is known as virology, a sub-speciality of microbiology.

Chromosome

What are Chromosome? Chromosomes is vary widely between different organisms. The DNA molecule may be circular or linear, and can be composed of 100,000 to 10,000,000,000 nucleotides in a long chain.


In eukaryotes, nuclear chromosomes are packaged by proteins into a condensed structure called chromatin. This allows the very long DNA molecules to fit into the cell nucleus. The structure of chromosomes and chromatin varies through the cell cycle. Chromosomes are the essential unit for cellular division and must be replicated, divided, and passed successfully to their daughter cells so as to ensure the genetic diversity and survival of their progeny.

HIV AIDS

Human Immunodeficiency Virus (HIV) is a lentivirus (a member of the retrovirus family) that causes Acquired Immunoeficiency Syndrome (AIDS), a condition in humans in which progressive failure of the immune system allows life-threatening opportunistic infections and cancers to thrive. Infection with HIV occurs by the transfer of blood, semen, vaginal fluid, pre-ejaculate, or breast milk.

Within these bodily fluids, HIV is present as both free virus particles and virus within infected immune cells. The four major routes of transmission are unsafe sex, contaminated needles, breast milk, and transmission from an infected mother to her baby at birth (perinatal transmission). Screening of blood products for HIV has largely eliminated transmission through blood transfusions or infected blood products in the developed world.

What is Gene

What is Gene? Genes are the units of heredity of living organisms. Physical form is a DNA sequence that becomes the password of a protein, polypeptide, or a strand of RNA that has a function to organisms that possess it.

Genes inherited by an individual to the offspring through a process of reproduction, together with DNA that carries it. Thus, information that maintains the integrity of form and function of an organism's life can be maintained.

In Eukaryote, gene structure consists of:

• Regulatory domains of transcription initiation, consisting among others of: chain  GCCACACCC, ATGCAAAT, GC box, CCAAT box and  TATA box.
• Intron
• Ekson, is an codification area of protein that can be transcribed in overlapping or non overlapping. 
• End regulation domain transcription 

Human Cell Science

Animal cell is a common name to Eukaryotic cell prepares animal tissue. Animal cell is different from another eukaryotic cell, like a plant cell. Because animal cell has no cell wall, chloroplast, and usually animal cell have a more little vakuola or not even exist, centrosome and centriole look apparent.  Because animal cell haven’t hard cell wall so the animal cell have a variation form. Human cell is a one type from animal cell. 

The human body was constantly continuously create new fat cells grow to replace every occurrence of the fat cells are dying due to natural processes of aging. 

What are Cells

What are Cells? Cells are the smallest organizational unit that became the basis of life (in a biological sense). All functions of life are organized and take place inside the cell. Therefore, the cell can function as autonomous as long as all their needs are met. All cellular organisms are divided into two groups, namely organisms prokaryotes and eukaryotes organisms.

Organisms prokaryotes have no nucleus and the internal organization of cells have a relatively more modest. Prokaryotes are divided into two two major groups: eubakteria covering almost all types of bacteria, and archaea, the prokaryotes are  very similar to the bacteria and breed in extreme environments like hot springs, acidic or water that contains very high levels of salt . Prokaryotic genomes consist of a single circular chromosome, with no organization of DNA.