TEAS Test Science

Nucleus - a part of the cell containing DNA and RNA and responsible for growth and reproduction. DNA - a long linear polymer, in nucleus, formed from nucleotides and shaped like a double helix, contains info that determines inherited characteristics RNA - a long linear polymer of nucleotides, in nucleus but mainly in the cytoplasm of a cell where it is associated with microsomes, ribonucleic acid; a nucleic acid that plays an important role in the production of proteins plasma (cell) membrane - Phospholipid bi-layer containing cholesterol and proteins. Receptors for communication; regulates movement into and out of the cell. AKA semipermeable membrane. cytoplasm - fluid matrix found between the plasma membrane and the nucleus that acts as scaffolding for the organelles. organelles - can act as a storage site, process energy, move materials, or manufacture substances ATP - (adenosine triphosphate) main energy source that cells use for most of their work, a nucleotide derived from adenosine that occurs in muscle tissue, the chemical a cell uses to store and transfer energy within itself. ribosomes - site of protein synthesis in the cell. endoplasmic reticulum - the means for transport within the cell, serves to store and deliver the proteins made by the attached ribosomes. storage of enzymes and minerals and the folding of proteins. it is thought to be involved in the detoxification of chemicals and the metabolism of fats. Cell Division/DNA - DNA is found in the nucleus in the form of chromatin and chromosomes. when a cell is not dividing, DNA is found in the form of loosely structured chromatin. but when a cell is dividing the DNA is seen in condensed rod-shaped bodies called chromosomes.