Biology Essays and Term Papers

generation to generation. That means the only way evolution has not taken place is if you look exactly the same as both of your parents, who would look exactly like their parents and so on. So, even going back to the beginning of life (however you…

respiration of yeast in different sugar substrates" Aim: The aim was to compare the respiration of yeast in different substrates of sugars, i.e. between a monosaccharide (glucose) and a disaccharide (maltose) Theory: There are three types of…

to Dissolve? Aim:         To find the relationship between the concentration of hydrochloric acid and the time taken by Magnesium to dissolve. Theory: Rates of Reaction -         Factors that alter speed of reactions. 1.…

biting into it. The food in the mouth sets off salivary glands that secrete salivary amylase, which breaks down amylase in the burger. When the food is broken down enough, the tongue shapes the food in a bolus, or a ball. The bolus is pushed back…

S Phase of the cell cycle. Initiator proteins begin the process. The strands are separated by the enzyme helicase. DNA polymerase begins replicating the leading strand in the 5' to 3' direction since DNA is antiparallel. The other strand, or the…

"XAre catalysts, as they speed up the rate of chemical reactions. "XRemain unchanged at the end of the reaction. "XAre needed in only small amounts. "XAre highly specific: one enzyme catalyses one type of reaction. "XWork best under certain optimum…

Diffusion is the process by which substances spread from regions of high concentration to regions of low concentration. It is a method of passive transport, and thus costs the cell no energy. Electrically charged ions and large molecules will not diffuse…

strikes Photosystem II, causing the electron to become excited. The excited electron bounces up to an electron acceptor, and is then passed down the electron transport chain. As the electron goes down the ETC, the electron loses energy. The energy…

RuBP to form a 6-Carbon sugar. The 6-carbon sugar immediately splits into 2 molecules of PGA. The PGA then takes an H from NADPH and a P from ATP and becomes PGAL. Some PGAL is then converted into glucose, most is used to build more RuBP. 6 turns are…

an adult woman in the West Nile District of Uganda in 1937. The ecology was characterized in Egypt in the 1950s. The virus became recognized as a cause of severe human meningoencephalitis (inflammation of the spinal cord and brain) in elderly patients…