Glucose travels in the plasma or liquid part of your blood but cholesterol (triglycerides) travel bound to protein carriers in the blood. Based on their respective chemical properties, explain the reason for this difference. (2 marks) Cholesterol is an amphipathic molecule, since it has polar and non – polar regions. Even though the cholesterol has polar group (OH) it dissolves fats than in aqueous
Results : Yield (mass in gram) = __________________0.128 g_____________________ Melting point of pure phenyl benzoate (OC) = ___________70O______________ Melting point of your phenyl benzoate (OC) = ___________69O______________ Questions : 1. Why do we use NaOH solution to dissolve phenol rather than water in step 1 ? Because NaOH can be use to change the phenol to ion form, which can be more soluble in the aqueous
Mixed Solutions: If 1 mmole of glucose (180mg=1mOsm) and 1 mmole of NaCl (58mg=2mmOsm) are put into a beaker and distilled water added to make 1 liter, the osmolarity is 3 mOSm/L. OSMOSIS CALCULATIONS: 1. Calculate the number of grams of NaCl needed to prepare 100 mL of a 280mOsm.L Solution. (280mosm/l) *(1L/1000mL)*(100mm/1)*(29mg/1mosm)*(1g/1000mg)=0.812g 2. Calculate the number of grams of glucose needed to prepare 100mL of a 280 msm/L glucose solution.
If the reaction is first order, its graphical representation is seen as ln[A] (natural log of concentration) vs. time, and the slope of its like is also the negative rate constant. Finally, for a second order reaction the graph is shown as 1/[A] (inverse of concentration) vs. time, and the slope of its given line is the positive rate constant. By understanding the rate law and finding the value of the correct rate constant with respect to the order of the reaction, one can determine the half-life of the crystal violet. This is because the crystal violet undergoes a decay reaction with the sodium hydroxide. According to Beer's Law, the absorbance of crystal violet is proportional to its concentration.
C6 H12 O6 = 2C3 H6 O3 + 2ATP (lactate) This is a structure of ATP ATP contains sugar which is Ribose, a base which is Adenine and three phosphate groups. Biological systems transfer the energy in glucose to ATP because unlike glucose ATP releases its energy instantly in a single reaction and also the hydrolysis of ATP releases a small amount of energy, ideal for fuelling reactions in the body. Glucose is obtained from food; we eat pasta which is a carbohydrate which is then broken down into glucose by the digestive system. The process which breaks this down is known as catabolism, this is the breakdown of food components, breaking down
Glucose is split into two molecules called pyruvate and two ATP molecules are generated per molecule of glucose as well as two molecules of NADH. Also Glucose takes place in the cytoplasm of the cell. Glycolysis can occur with or without oxygen. Without oxygen it is called fermentation with oxygen it is the first stage of the cellular respiration. • What is the role of the citric acid cycle?
Lactase Buffer solutions 4,7,9 Enzymes are organic catalysts that control the rate of chemical reactions in cells while not being permanently altered themselves. In general, enzymes speed up the rate of reaction by lowering the activation energy required to start reactions. Lactase is an enzyme used by the body to hydrolyze lactose, a disaccharide unique to mammalian milk, into the monosaccharaides, glucose and galactose. Lactose has been shown to aid in the absorption of several minerals, including calcium, magnesium, and zinc. .
AP LAB 1: Diffusion and Osmosis Exercise 1A: Title: Diffusion Objectives: * To understand the mechanism of diffusion and its significance in cells. * To understand how solute size and concentration gradients effect diffusion across a selectively permeable membrane. * To understand how a selectively permeable membrane between two solutions effects diffusion between them. Hypothesis: If I observe that a Benedict's test has came back positive for glucose in the beaker when it came back negative initially, the color of the bag has been tinted from initially being clear, and the mass of the bag has increased; then I will conclude that the dialysis tubing is permeable to glucose, iodine potassium-iodide, and water but not starch, and diffusion has occurred. Procedure: 1.
Sucrose is used to sweeten foods, and provide short term energy. In sodas such as the orange soda and clear soda used during this lab, the sugar is used to sweeten the drink. Density can be used in order to find the sugar concentration in a particular solution. Density is known as the amount of mass that will fit into a certain volume. For this lab, the density of water will be 1 gram/cubic centimeter.
Purpose of the Experiment: To produce diphenylmethanol from the reduction of benzophenone by using sodium borohydride as a reducing agent. To check purity of a product by using thin layer chromatography (TLC) and by performing a melting point. Introduction: The key step in the reduction of a carbonyl compound by either lithium aluminium hydride or sodium borohydride is the transfer of a hydride ion from the metal to the carbonyl carbon. In this transfer the hydride ion acts as nucleophile. The mechanism for the reduction of a ketone by sodium borohydride: (1) Method (Based on Chemistry Laboratory Manual): 1.