Expression will be regulated using promoters. This lab deals with the promoter known as araC, and it plays an important role in the expression of fluorescence. Method and Materials: Competency was induced in E. coli, using calcium chloride. The pGLO was then introduced to the E. coli, and the mixture was plated onto four plates. 2 plates were plated with non-transformed E. coli the plates were designed to either promote or inhibit two factors: growth and fluorescence.
How it was expected the pH at equivalence point was 9.17 this is because of the domination of hydroxide ion in solution. The relationship between the pH and the amount of titrant added offered a better understanding of the equilibrium properties of the acid. Introduction Titrations are a convenient and common method of analysis. Generally titration is an experiment where a known property of one solution is used to infer an unknown property of another solution. There are several types of titrations: Acid-base titrations are based on the neutralization reaction between the analyte and an acidic or basic titrant.
Describe and explain the roles of water in living organisms and as an environment for living organisms Water has many different properties than enable it to be easier for organisms to live in. Firstly, water is a great solvent. The importance of this is that the metabolic processes in all organisms rely on chemicals being able to react together in solution. We can see this through many examples for organisms. To start with, there is the transport of nutrients, in glucose and amino acids in the blood.
From this information, the percentage of salt verses water ions can be determined Ions are also produced in the liquid or solid state when salts interact with solvents (for example, water) to produce "solvated ions," which are more stable, for reasons involving a combination of energy and entropy changes as the ions move away from each other to interact with the liquid. These stabilized species are more commonly found in the environment at low temperatures. A common example is the ions present in seawater, which are derived from the dissolved salts. Procedure Obtain 250 mL beaker Weigh dry 250 mL beaker and record weight. Add 10mL of unknown salt and water solution.
| | | A) | endoplastic reticulum | | | B) | microtubules | | | C) | cytoplasm | | | D) | mitochondria | | | | | | Feedback: The cell's chemical processes take place in a semifluid material called the cytoplasm. This material provides an ideal environment for organelles because of its fluidity. | | 7 CORRECT | | This shows an example of endoplasmic reticulum. What is the significance of its structure? | | | A) | provides a location for DNA production | | | B) | helps decrease surface area | | | C) | allows selective permeability of cell membrane | | | D) | facilitates breakdown of chemical bonds | | | | | | Feedback: The pleats and folds of the endoplasmic reticulum provides a large surface area where cellular functions, such as breaking chemical bonds, can take place.
ADH aids the reabsorption of You correctly answered: a. water. 03/31/14 page 1 Experiment Results Predict Question: Predict Question: What will happen to the urine volume and concentration as the solute gradient in the interstitial space is increased? Your answer : c. The urine volume and concentration will increase. Stop & Think Questions: Why is the solute concentration (mOsm) in the proximal tubule the same as in the blood? You correctly answered: d. Because water and many plasma solutes filter into Bowman's capsule.
The pyruvate is garter oxidized to yield more ATP What happens to the pyruvate under anaerobic conditions? The pyruvate is converted into lactic acid Diffusion After viewing the animation, answer these questions. Molecules dissolved in a solution are in constant random motion due to their kinetic energy . One result of this motion is that dissolved molecules become evenly distributed throughout the solution . This tendency of molecules to spread out is an example of __diffusion .
The importance of hydrogen bonding in biology Hydrogen bonds are extremely important in biological systems. Their presence explains many of the properties of water. They are used to stabilize and determine the structure of large macromolecules like proteins and nucleic acids. They are involved in the mechanism of enzyme catalysis. Properties of Water Property | Importance | Examples | Solvent | Metabolic processes in all organisms rely on chemicals being able to react together in solution.
BIO 5 June 12 essay 10a The importance of shapes fitting together in cells and organisms Plan- • Enzymes - lock and key model, induced fit, specific complementary shapes, digestion of lactose, restriction enzyme in DNA • RuBP binding with CO2 in light dependent reaction of photosynthesis • Muscles - contraction, sliding filament theory • Blood and oxygen - inhibitors blood glucose receptors on cell surface membrane Essay- There are numerous examples of of the importance of shapes fitting together in cells and organisms. For example ; within enzymes, DNA, photosynthesis, muscle contraction, and receptors. Enzymes are used in every aspect of biology to catalysts a reaction. As they bind to substrate molecules which have a specific complementary shape to the enzyme, to form enzyme-substrate complexes and finally the enzyme and the product. There are many models of enzymes, such as the lock and key model, which explores the structure of the enzyme and its ability to bind with a substrate molecule which is specific and complementary.
Analyze the polarity of the different regions of a phospholipid molecule. Use the model of the phospholipid to describe the structure of the cell membrane. How do water, phospholipids, and proteins interact to produce the cell membrane? * Analyze the polarity and water-solubility of the different regions of the globular protein floating in the phospholipid bilayer membrane shown below. The protein molecule is able to float in the membrane – part of it is embedded in the membrane, part of it sticks into the cytoplasm, and part of it sticks out into the aqueous environment of the cell.