Hydrogen peroxide is a poisonous chemical to all living things. Catalase converts H 2O 2into 2 separate harmless substances, water and oxygen. In this experiment we will be testing the effects of temperature, pH and substrate concentration on Catalase. The optimum pH of catalase is 7 and its optimum temperature is 37 degrees. Aim: To test the effect of change in pH, Temperature and substrate concentration on catalase in liver Hypothesis: we predict the enzyme will have its greatest reaction when it is in its optimum temperature, pH and substrate concentration Risk assessment: * Wear gloves when handling raw liver.
Chemistry PAT Question 1 Polyhydroxybutyrate (PHB) is a biopolymer with properties very similar to that of polypropylene, though has all the benefits that come with biopolymers. PHB was first introduced to the scientific community by the scientist Maurice Lemoigne in 1926. He noticed that to produce PHB you need particular micro-organisms such as Alcaligenes Eutrophus or Bacilius megaterium undergoing physiological stress in an apparatus such as an agar dish to allow the micro-organisms to multiply. In order to achieve this stress there is a restriction to the amount of nitrogen the micro-organisms can attain thereby altering its nutrition. This is quite an efficient method of production and the amount of the PHB polymer yielded is around 30-80% of the dry weight of the micro-organisms used.
Refrigeration slows food spoilage because the lower temperature slows binary fission. Under optimal conditions with no limiting factors prokaryotes can grow exponentially. 3. Some bacteria can form endospores in response to harsh environmental conditions. An endospore is a chromosome surrounded by a durable wall that can resist desiccation, freezing and boiling water.
Also, cytosol is the site of chemical reactions needed to maintain cell structures and allow cell growth. E.) The types of proteins in the cell membrane that were involved in the homeostatic imbalances of his heart cells are ATP, because the lack of it affected the pumps in the membrane, and the calcium from the cytosol ATPases stopped moving calcium from the cytosol into the ER of his cardiac muscle cells. As the intracellular calcium levels rose, they caused proteases to spill into the interior of the cell, attacking the cytoskeleton. Thus, lysosomal enzymes normally bound safely inside vesicles digest the plasma membranes and membranes of the organelles. F.) Reestablishing oxygen flow to his body is so important because oxygen is required by cells to produce ATP, energy currency of the cell and without it homeostasis can shut down.
The stronger the magnet the greater the field. The static magnetic field can have mechanical effects on the pacemaker. It has been known to effect certain parts of the pacemaker allowing it to revert to different intervals of pacing. It also has the ability to reprogram or reset the device all together. The static magnetic field exerts a magnetic force that can dislodge the pacemaker leads.
With an increase in plasma osmolarity our body is told to release ADH. ADH is also stimulated when Blood pressure falls. When our BP is low, our body’s fluid volume is also low, and ADH release responds to this to help our body get more fluid back into itself, to help increase BP or homeostasis. Without ADH our bodies let go of very dilute urine because it controls osmolarity by controlling
In most cases, the immune system does a great job of keeping everyone healthy and preventing infections. It is known as the main defence against infection by foreign agents. It is a complicated network of chemicals and cells that function to destroy foreign agent i.e. viruses. Phagocytes are cells that surround and ingest foreign particles.
The level of osmotic pressure is equal in the intracellular fluid, and the extracellular fluid.’ (Study.com, 2015) ‘Osmotic pressure is vital within the human body because it allows water to enter a cell if there is lack of water, and vice versa, if there is too much water within one cell, the osmotic pressure will allows the electrolytes to exit a cell.’ (Study.com, 2015) ‘Intracellular fluid has important functions, it transports food within the cells, it also brings waste products from the cells so that they can be picked up and excreted from the body, and it maintains the shape and size of the cell.’ (Nursing411.org, 2015) ‘Extracellular fluid is located outside the body cells. The extracellular fluid consists of one-third of the water contained in the body. The extracellular fluid has many functions; it carries nutrients and oxygen to the body cells and waste materials from the cells. There are two types of extracellular fluid, including interstitial fluid and intravascular fluid.’
These people work with cats on a daily basis, so they are like a part of their life. By using the cat as the main focus for the advertisement, it can reach out to children as well. Most children are animal lovers, and when advertisements reach out to children, and then, it will eventually reach out to the parents. Fresh step used humor for this
Two main reasons the membrane of a cell is important is because first off, the chemical reactions that are necessary for life could occur efficiently in an enclosed area since reactants could collide more frequently (Freeman et al., 2011). Secondly, the membrane serves as a selective barrier where it keeps compounds that could damage the cell out and brings compounds that are needed by the cell in (Freeman et al., 2011). Cell membranes consist of two types of lipids. The ones that form membranes have a polar end and a non-polar end. Polar heads of the lipids are hydrophilic, meaning that they love interacting with water.