Prokaryote

Prokaryotes, specifically bacteria, have feedback regulatory mechanisms like eukaryotes do to make tryptophan. Tryptophan is one of the 20 amino acids which we all need. If there is a lot of tryptophan made, then you turn off the enzymes that are involved in tryptophan synthesis by binding and causing a change in shape of the enzyme (negative feedback). In addition, repressors are proteins that bind to the operator and prevents expression of the gene. However, the repressor is unable to bind to…

The earth tilts possibly due to being hit by an asteroid billions of years ago causing it to tilt in the sun 's orbit. Therefore its axis that should be completely vertical top to bottom) tilts. The earth completes one turn daily therefore all the world will receive sunlight and will enjoy the changes of season because of this tilt. It has nothing to do with how close it is to the sun but because the axis is not straight. The axis stays tilted in the same direction as it orbits around the sun…

In a cell there are many organelles to help keep the cell functioning. In the cell you could have a cell wall, cell membrane, ribosomes, cytoplasm, flagella, cilia, nucleus, nuclear membrane, nucleolus, chloroplast, Golgi apparatus, lysosomes, mitochondria, plastid, rough endoplasmic reticulum, smooth endoplasmic reticulum, vacuole, and a vesicle. Everyday items can represent many of the organelles. One example of this is by looking at a house. In a house you have a fence. The fence in your…

Fermentation - occurs without O2, is partial degradation of sugars to release energy Aerobic respiration - uses O2 in breakdown of glucose (or other energy-rich organic compounds) to yield CO2 and H2O and release energy as ATP and heat Of some prokaryotes - doesn’t use O2 as a reactant but it 's a similar process Cellular respiration - usually used to refer to aerobic process Is exergonic and has a free energy change of -686 kcal/mol of glucose Redox reactions: oxidation and reduction…

Endosymbiotic theory states that organelles were once prokaryotic cells, living as a part larger cells. The prokaryotic cells may initially have been parasites or an intended meal for the cell. Whatever the cause, those prokaryotes would soon become cooperative prisoners. The prokaryotic cells would soon provide crucial nutrients or even to maximize oxygen usage for transforming energy. The prokaryotic cells, in return, would get protection and a constant environment to live. A lot of evidence…

Christianity is a monotheistic religion based on the life and teachings of Jesus Christ, who lived 2,000 years ago. In 2010, the number of Christians was at 2.2 billion, 31 percent of the world’s population (Chappell, 2015). Christians believe that God created the Earth and everything else, including humans, in six days. On the other hand, science has revealed that earth most likely was formed about 4.6 billion years ago. It formed from dust and gas rotating and gathered by gravity after the Sun…

harsh and extreme environments. Because only some genera of bacteria produces the endospore, its identification is important in helping us identify some bacteria. 2. What type of eukaryotic cells did we observe and how were they different from the prokaryotes we have looked at? (Be sure to include ways they are different internally as well as any observable traits) The type of eukaryotic cells that we observed were yeast cells. Under the microscope, the only observable differences between the…

all bound by a cell membrane and wall. Eukaryotes, on the other hand, contain complex double membraned organelles, complex DNA (arranged on chromosomes), and a nucleus. Due to the efficiency required of the cell, it is significantly larger than prokaryotes,…

Take for example most prokaryotes and some plants (e.g. Kalanchoe beharensis) that reproduce asexually. Can we apply this definition of a species to a bacterium or the Kalanchoe beharensis? Does this mean that bacteria cannot be classified as a species? The above definition is primarily…

The smallest unit within a living thing is known as a cell. Organisms are also a living thing and cell is considered to be the basic block of organisms that builds them. There are many different types of cells in a living thing and are divided into two main categories (i) prokaryotic and eukaryotic. (Karp, 2010). Characteristics of living cell Cells are considered as the most fundamental unit that has the responsibility to carry functions within a living organism (De Robertis & De Robertis,…