cooling will result. A plant’s defense is due to its skin: the epidermis or periderm. Another line of defense is a chemical attack that kills pathogens. This is enhanced by the inherited ability to recognize certain pathogens. Plants respond to the environment. Examples are touch‚ light and gravity. Through photoreceptors they can detect light‚ its direction‚ intensity and wavelength. Most responses are triggered due to plant hormones. Tropism is any type of response that results in curvature
Premium Plant Plant physiology Xylem
AP Bio DNA‚ RNA‚ Protein synthesis Study Guide DNA Structure Nucleotide structure - sugar‚ phosphate group‚ base backbone structure - alternating sugar and phosphate group directionality (5’-3’) - DNA is anti parallel. The side that sticks out s the 5’ side bases - adenine = thymine & guanine=cytosine purines vs Pyrimidines - purines have two rings while pyrimidines have one ring Bonding - hydrogen bonds Base Pairing rules - look at bases ^^ DNA Replication Semi-conservative replication
Free DNA RNA
Locard’s Exchange Principle and the use of Fingerprints: Edmond Locard (1877-1966) was a French scientist specialised in both medicine and law. Inspired by the work of Hans Gross‚ it was Edmond that created the concept that all objects of any material should leave traces of itself upon whatever it touches‚ even if it is the minutest amount‚ simply put as “Every Contact leaves a trace‚” Locard (1923). This is commonly known as Locard’s Exchange Principle. He believed that in circumstances such as
Premium Internet Cryptography Cipher
Peter Dang Mrs. Truesdell AP Biology Period 5 2 October 2013 CHAPTER 7 STUDY GUIDE AN OVERVIEW OF PHOTOSYNTHESIS Autotrophs are plants that can feed themselves by making their own food. Photo-autotrophs are organisms that produce organic molecules from inorganic molecules using the energy of light. Producers are when plants make their own organic molecules. A redox reaction is oxidation and reduction. Photosynthesis takes water and carbon dioxide to make glucose and oxygen. Cellular respiration
Free Photosynthesis
AP BIOLOGY ESSAY QUESTIONS 1. Discuss the lock-and-key theory of enzyme-substrate interaction giving a specific example to illustrate the theory. Include in your discussion the effects of each of the following: a. b. c. d. 2. Substrate concentration pH shifts Temperature shifts Competitive inhibition Describe in detail the process of meiosis as it occurs in an organism with a diploid chromosome number of 4 (2n = 4). Include labeled diagrams in your discussion. Indicate when and how each of the
Premium DNA Eukaryote
Kunal Bhattacharjee Period 8 AP Bio Enzyme Catalysis Lab Report by Kunal Bhattacharjee 1 Kunal Bhattacharjee Period 8 AP Bio Enzyme Lab Report INTRO: Enzymes are a type of proteins that are formed by Amino acids and help speed up metabolic reactions. They are able to do this by interacting with the substrate . The substrate is what is being breaking down in the reaction. The substrate comes in to contact with the enzyme by binding to
Free Chemical reaction Enzyme Catalysis
them. Explain what is meant when we say a molecule is amphipathic. 3. In the 1960s‚ the Davson-Danielli model of membrane structure was widely accepted. Describe this model and then cite two lines of evidence that were inconsistent with it. 4. Who proposed the fluid mosaic model of membrane structure? When? Describe this model. 5. What is meant by membrane fluidity? Describe the movements seen in the fluid membrane. 6. Describe how each of the following can affect membrane fluidity:
Premium Cell membrane Membrane biology Signal transduction
As discussed in the intro‚ the purpose of this lab is to observe principles of homeostasis and osmosis in action. The results of this experiment showed that eggs placed in a 4 M sucrose solution lost mass over time and had the greatest percent difference in mass compared to the eggs in other solutions‚ with the 4 M egg having an average of -25.13% difference in mass. The 0.0 M solution egg only had a 12.28 average percent difference in mass‚ the 0.5 M egg with 10.39%‚ and the 1 M egg with the least
Premium Concentration Solution
AP Biology August 23‚ 2012 Egg Osmosis Lab Definition of osmosis: The diffusion of water across a selectively permeable membrane from high to low concentrations Hypothesis: If I place an egg in vinegar‚ then the outer layer of the egg is going to become slimy and look like rubber. It will also become larger and bubbles will form on and around the egg. Hypothesis: If I place an egg in corn syrup‚ then the egg will become small and the outer layer will not look like rubber any longer. Day one:
Premium Osmosis Concentration Solution
Chapter 3 Molecules of Life I. Carbon 1. 6 electrons- (4 valence) has the ability to bond with 4 other elements 2. Hydrocarbons- (contains only C & H) 3. Asymmetric carbon- attached to 4 different atoms or groups of atoms II. Isomers - Compounds having the same molecular formula but different structure and properties 1. Structural- differ in covalent arrangement of their atoms and may differ in location of double bonds 2. Geometric- same structure different arrangement 3. Enantiomer/stereoisomer
Premium Protein Amino acid DNA