Presentation on theme: "BELL WORK Answer the following question on your bell work sheet. You do NOT have to write the question, but you MUST write out your entire answer. Which."— Presentation transcript:
BELL WORK Answer the following question on your bell work sheet. You do NOT have to write the question, but you MUST write out your entire answer. Which of the following statements about enzymes is false? a)Enzymes are biological catalysts. b)Enzymes are specific and only fit with one substrate. c)Many types of substrates can fit each enzyme. d)Enzymes reduce the activation energy required for chemical reactions.
DNA & Enzyme Notecards Period 4 & 5 Due Tuesday (10/14/14) Protein DNA Nucleotide Nucleic Acid Deoxyribose Nitrogenous Base Hydrogen Bond Adenine Cytosine Guanine Thymine Double Helix Antiparallel Catalyst Substrate Enzyme (“-ase” must be in your definition) Active Site Enzyme-Substrate Complex
Essential Question : What are the similarities and differences between carbohydrates, lipids, proteins?
Discussion Questions 1.How long did it take for the original lifesaver to dissolve? 2.How long did it take for the new lifesaver to dissolve? 3.Why do you think there was a difference in time? 4.What is a catalyst? What is an enzyme? 5.How does this lab relate to enzymes and catalyst?
Enzymes… Enzymes are special proteins that work in the body to help speed up reactions Enzymes are biological catalysts. Catalyst: a substance that helps to speed up a chemical reaction but is not used up in the reaction Enzymes can be used over and over again. amylase - in saliva pepsin - in stomach Lactase - breaks down lactose DNA Polymerase I (DNA replication) DNA Polymerase III (DNA replication) RNA Polymerase (mRNA synthesis) Helicase (DNA replication) Ligase (DNA replication)
Enzyme function Enzymes work best under certain internal conditions. Enzymes help maintain homeostasis in living organisms. Enzymes reduce the activation energy needed in a reaction and speed up the rate at which the reaction is completed.
Enzymes are VERY specific and perform very specialized tasks Substrates are chemicals that bind to the enzyme and become altered (bonds formed and/or broken), producing a product Enzymes have specific shapes that match or react with specific substrates (like a lock and key) Draw this in your notes complex
Enzyme- Substrate Complex
Biomolecule Review Copy information from the “Biomolecule Sort” page into the correct boxes on your chart. Each box will be filled. Write the SENTENCES in the space above the biomolecule name. You may use your notes. You must complete the chart ON YOUR OWN. (CHAMPS) Raise your hand if you have any questions.
HW#6: DNA Structure Periods 4 and 5 Search for the YouTube video “DNA Structure”DNA Structure” by Alyssa Dolny. Complete on Page 26 of your I.A.N. using Cornell Notes. Due on Thursday.