Ghostbuster Slime Lab 10/4/2012 Abstract The purpose of this experiment was to observe the physical properties and changes of the creation of a polymer as a result from cross-linking. A borax solution was made and was combined with a polyvinyl alcohol solution. A polymer’s cross-links give them many properties, like bonding ability, elasticity, and viscosity. The amount of water added in the experiment directly affected the viscosity and elasticity of the slime polymer. Too much water added resulted in a high viscosity and low elasticity.
What is/are the important biological function(s) of polysaccharides? c. energy storage d. structural support e. enzymatic activity f. information storage ans: a and b 4. All of the following statements are true about the plasma membrane except which? g. Proteins can move across the membrane. 5.
Question 1 1 out of 1 points | | | Which term most precisely describes the cellular process of breaking down large molecules into smaller ones? | | | | | Selected Answer: | catabolism | | | | | * Question 2 1 out of 1 points | | | Sucrose is a disaccharide, composed of the monosaccharides glucose and fructose. The hydrolysis of sucrose by the enzyme sucrase results in | | | | | Selected Answer: | breaking the bond between glucose and fructose and forming new bonds from the atoms of water. | | | | | * Question 3 1 out of 1 points | | | Which of the following types of reactions would decrease the entropy within a cell? | | | | | Selected Answer: | dehydration reactions | | | | | * Question 4 1 out of 1 points | | | Which of the following is true for all exergonic reactions?
------------------------------------------------- Grt1 Biochemistry task 4 WGU July 26, 2014 Tina Pursel Student ID#361726 July 26, 2014 Tina Pursel Student ID#361726 SECTION 1: Hereditary Fructose Intolerance * Enzymes as catalysts in biochemical processes: * Enzymes are proteins that carry out chemical reactions by binding to substrates, which are substances that need to be broken down and changed in order to be used by the body for energy. * When this occurs, an enzyme-substrate complex is formed * As the enzyme changes the composition of the substrate into the intended product, it remains unchanged and at the conclusion of the process the enzyme moves on to the next substrate and the process starts
Biology Chapter 4- Study Guide- NAME: _________________________________________Perid___________ 1. What type of energy do all cells have? 2. What best describes the function of the ATP molecule? ___________ energy 3.
Title: The Effect of the Environment on Cellular Respiration in Yeast Name: Ryan Kiss Class: CP Biology 1 Date: 10/6/13 Statement of Problem: Does the concentration of glucose in the environment affect cellular respiration in yeast? Independent Variable: concentration of yeast Dependent variable: Production of CO2 Control: 0% molasses Controlled Variable: Amount of Bromothymol Blue (BOB), temperature of water, amount of experiment time, type of yeast. Background Information: In this experiment Bromothymol Blue was the indicator. How BOB was used in this experiment is it was placed in test tubes A, B, and C and changed color as CO2 was produced revealing the effect of cellular respiration. Cellular respiration is a chemical process that converts molasses into ATP.
Kirstie Javier AP Biology Period 4 November 14, 2011 Proteins Proteins are biochemical compounds consisting of one or more polypeptides typically folded into a globular or fibrous form, facilitating a biological function. Some types of chemical bonds/ interactions are disulfide bonds, hydrogen bonds, ionic bonds, and hydrophobic interactions. Disulfide bonds form when two cytosine molecules join together to form a bond between their two sulfur atoms. Such bonds cross-link polypeptide chains or parts of chains. Because they are nonpolar covalent bonds, they are very strong bonds and not easily broken.
Purines however are made of a six-sided ring joined to a five-sided ring. These rings are joined with hydrogen bonds and the bases in this group are adenine and guanine. This means that to make a base pairing a pyrimidine must bond with a purine. There are different numbers of bonds between the four bases, when adenine and thymine are joined there are only two hydrogen bonds, but when cytosine and guanine join there are three hydrogen bonds. Original DNA model by Watson and Crick.
Enzymes are specific; they only work with certain substrates. Substrates are the reactants in an enzymatic reaction. Out group conducted two labs which examine how specific an enzyme is to a substrate and how much environmental factors affect enzyme reactions. Lactase is the enzyme that breaks down lactose into galactose and glucose. Since they’re both a six sided sugar, lactase can only break down lactose.
Electron flow, proton pump, chemiosmosis, Krebs, citric acid cycle 1 pt- ATP, etc 1 pt- photosynthesis- light Rxn, Calvin 1 pt- protein sythesis 1 pt- proteins- ex. amino acid sequences, isoenzymes, cyctochrome C, hemoglobin (addn’l pt for elaboration), insulin 1 pt- cell structure based on similarity in molecular composition Molecular structure commonality: 1 pt- DNA base sequence/homology/hybridization ( 1 addn’l pt for explanation) 1 pt- RNA base sequence/homology/hybridization ( 1 addn’l pt for explanation) 3. fossil record 1 pt- stratification of fossils as evidence of change 1 pt + 1 pt- examples with description of change: humans, horses, vascular plants, shellfish 1 pt- limb homology + elaboration of example 1 pt- chronology- radioactive dating 1 pt- cladistics/phenology 1 pt- extinction of species 2. Genetic variation is the raw material for evolution. A) Explain THREE cellular and/or molecular mechanisms that introduce variation into the gene pool of a plant or animal population. B) Explain the evolutionary mechanisms that can change the composition of the gene