All prokaryotic cells have distinct shapes and appendages. There are eight different distinct bacterial shapes; Coccus is an individual spherical bacterium, Diplococcus is two spherical bacterium together, Streptococcus is a string of spherical bacterium, Staphylococcus is a cluster of spherical bacterium, Bacillus is rod shaped, Vibrio is bent-rod shaped, Spirochete is lose-spiral shape, and Spirillum is a tight-spiral shape. The appendages of the prokaryotic cells assist in protection, movement, and adherences to surfaces. Staining in used to enhance bacterial cells in order to easily view its identifiable structures and appendages, and to create a contrast between the cells and the background of the slide. Since most cells are microscopic, staining improves the human ability to view them through a microscope.
The cell membrane is semi-permeable because it allows some substances to pass through and some substances cannot pass. Small molecules such as water, glucose, and amino acids can pass through the membrane while large molecules such as starch cannot pass through. Active transport is the movement of a particle against its concentration gradient (requires energy). Passive transport is the movement of molecules across the membrane (does not requires energy). Diffusion is the movement of molecules without the use of energy.
Minerals are similar to vitamins you have to eat them together them. The only difference in the two is that minerals can not be broken down. Water also known as H2o is very important to our body. Water is important because it controls our temperature, carries nutrients to our cells, and helps our cells function. Water keeps you hydrated but does not have all of the calories like fats and carbohydrates.
Introduction All cells have plasma membranes which are selectively permeable meaning only some materials are able to move across it either to enter or exit the cell. The ability of a molecule to cross the plasma membrane depends on its size, hydrophobicity and charge as well as the relative concentration inside and outside of that cell (Biology Department, 2010). When molecules move from high concentration to low concentration it is called diffusion. More specifically when water diffuses across a cell membrane it is called osmosis. If the concentration of water in a cell is lower than the concentration of water in the solute the solution is said to be hypotonic and the cells swell because they will take up water.
The site of various chemical reactions. Plasma membranes are present in all cells and organisms; it has similar functions in different organelles but may vary depending on the organism. It is only present in eukaryote cells and prokaryotes do not. The most well know or studied membrane is the mosaic fluid model which is the outer membrane of all eukaryote cells. This is made by a phospholipid bi-layer containing hydrophilic heads made from a phosphate group and hydrophobic tails which are made from 3 fatty acids which is similar to a triglyceride.
Human photo synthesis If humans were able to photosynthesize it would have great advantages and also some very bad disadvantages. Some advantages would be that we could use less land for farming. Instead we could plant more sugar Cain and plants that will help reverse global warming. We could use less fuel and resources for farming. The disadvantages of having photosynthesis is the world economy would have to completely change there would no longer be a need for, farmers, cooks, chefs, waiters, there would be no more restaurants, grocery stores, vending machines, and much much more would no longer be necessary.
Like chlorophyll “a”, it is located inside a cell’s chloroplast and embedded in the thylakoid membranes, but it only resides in photosystem II (Billiet). Chlorophyll “a” and “b”’s structure are alike, and also, both chlorophyll “a” and “b” are insoluble in water [ (College) ]. Chlorophyll “b” is an accessory pigment though, which means that it absorbs the light that chlorophyll does not and transfers it to chlorophyll “a” so it can be converted into chemical
INTRODUCTION Enzymes are protein molecules which serve to accelerate the chemical reactions of living cells. Without enzymes, most biochemical reactions would be too slow to even carry out life processes. Enzymes display great specificity and are not permanently modified by their participation in reactions. Since they are not changed during the reactions, it is cost-effective to use them more than once. However, if the enzymes are in solution with the reactants and/or products it is difficult to separate them.
Life on earth with less solar radiation can decrease support for producers. Since producers are the most important part of the food chain, it is possible that the food chain may cease to exist. Life would be impossible without it as it is the basis of all life on earth. Organisms such as plants for example depend on solar radiation to exist and organisms such as animals depend on plants to