Here are some resources to study for the quiz on lessons 4 and 5
Quizlet Review for Lessons 4 and 5
Nearpod from lesson 4 and Lesson 5 includes a mini quiz
Images for these lessons
- Breakdown of large food molecules (Hydrolysis) a closer look
- Starch Breaks Down (Hydrolysis)
- Build up of Protein (Dehydration Synthesis)
- Comparison of Dehydration Synthesis of Proteins and carbohydrates Chemical Reactions
Big Ideas
Lesson 4: You should be able to explain the results from the experiment in lesson 4. Look at the photo of the results. You should know which indicator (Benedicts and Iodine) is for which molecule and why we did the tests we did to show that starch breaks down into glucose molecules in the presence of Amylase. You should know that amylase is an enzyme that speeds up the reaction but is not a reactant in the reaction.
You should be able to recognize images of starch molecules and protein molecules as well as their subunits (see links above) Remember that if nitrogen (blue) is part of the molecule then it has to be a protein or an amino acid.
Lesson 5: You should know that the rat study was important because it provided evidence that the protein we eat is used to replace old proteins in our bodies and that not all of it is excreted as previously thought.
You should know that animals store extra food as fat. If animals eat more calories than they expend they will store all food molecules as fat (and glycogen.. but we don’t really get into that in this lesson)
hydrolysis and dehydration synthesis
Lesson 4: Hydrolysis (hydro: water lysis: cut, separate) is the chemical reaction that breaks down big food (proteins and large carbohydrates like starch) molecules into small molecules (amino acids and glucose/sugars) during digestion so that the molecules can enter the body’s cells and be used for energy, building materials, and repair. water and big food molecules are the reactants in this chemical reaction and subunits are the product. You tasted this chemical reaction at work while you were chewing a cracker in class and it started to taste sweet.
Lesson 5: Dehydration Synthesis: (dehydration: remove water synthesis: put together) is a chemical reaction that builds up big molecules by removing HO and H (H2O) from the subunit amino acids to make proteins that are used by the body. (This chemical reaction also takes place in plants to build large starch molecules. we will cover this in lesson 6)Subunits like glucose and amino acids are the reactants in this chemical reaction and water and large molecules are is a product in this chemical reaction. This is what we modeled with the paper in class on 11.1.19.