Most of the metabolic activity in a cell occurs in the mitochondrion. This organelle is responsible for the generation of ATP through a process known as oxidative phosphorylation.Know More
Both fatty acids and carbohydrates are metabolized inside the mitochondrion. The purpose of this breakdown is to produce as much ATP as possible through the process of glycolysis and the citric acid cycle. The ATP is then used to fuel other processes occurring in the rest of the cell.
The mitochondrion is a unique organelle as it has its own variant of DNA. This allows the organelle to produce its own proteins, tRNAs and rRNAs. It is thought that mitochondria originally began life inside bacterial cells, but transferred to complex eukaryotic cells later on. This is known as the endosymbiotic theory.Learn more in Cells
Cell transcription occurs in the nucleus of the cell where the DNA is located. Transcription is the process whereby a DNA base sequence is copied to form an RNA molecule. The production of mRNA requires a DNA template.Full Answer >
Dr. William H. Heidcamp, a professor in the Biology Department at Gustavus Adolphus College, explains that cell differentiation occurs when the structure and function of cells change within a certain period. The formation of the three germ tissues of embryos, which are the endoderm, ectoderm and mesoderm, is a classical approach to the basic process of cellular differentiation.Full Answer >
Crossing over begins very early in the prophase I stage of meiosis. During prophase I, pairs of homologous chromosomes exchange lengths of their genetic material. Crossing over leads to recombinant chromosomes and is a key factor in genetic recombination. This produces genotypes in offspring that are new and different combinations of the parental alleles. Crossing over, along with independent assortment, is the basis for Gregor Mendel’s laws of genetics.Full Answer >
Aerobic respiration on the cellular level occurs in the cell's mitochondria, according Georgia State University. Respiration transforms pyruvate into adensoine triphosphate through the TCA cycle in mitochondria. The TCA cycle, also known as the Krebs cycle, uses enzymes to transport electrons among water, oxygen, carbon and other atoms.Full Answer >