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The arrow is indicating a single proton, a hydrogen ion (H+). proton c. Biology 155 - Chapter 2: The Nature of Molecules & the Properties of Water You recently discovered a new element, and find that this particular element has one electron in its outer energy level. Learn faster with spaced repetition. 1 (Page 9) and more. -The higher the pH number, the higher the concentration of OH- in a solution. Take your stomach, a very acidic environment. Acids and bases can very much change the properties of the solutions in which they are dissolved. These fascinating chemical chameleons are called amphoteric substances. Test your knowledge on PH concepts and water molecules today! Mastering Biology Chapter 28 HW 3. Study with Quizlet and memorize flashcards containing terms like Aerobic metabolism always requires _____. Study with Quizlet and memorize flashcards containing terms like What process occurs in Box A?, What process occurs in Box B?, What molecule is indicated by the letter D? and more. Many solutions are a mixture of water and some other substance. , Because organisms are made primarily of water, they resist rapid temperature changes. Adaptive Follow-Up {135+} Also Current Events: DNA Double Take (New York Times, 9/16/2013) Learn with flashcards, games, and more — for free. , What is the correct order for the hierarchy of biological organization from the least to the most complex? See Concept 1. stimulates cell elongation in newly forming tissues. If foreign strong substances dramatically change this pH, our bodies can no longer function properly. Acids can be dangerous: The holes in the paper were made by a solution with 98% sulfuric acid. Which 4 of these 25 elements make up approximately 96% of living matter?, The innermost electron shell of an atom can hold up to _____ electrons. Ex: sulfuric acid, nitric acid, citric acid Base: Decreases the hydrogen ion concentration of their aqueous solution or release hydroxide ions in solution. , About 25 of the 92 natural elements are known to be essential to life. element b. Mastering Biology Ch 2 A substance that cannot be broken down into other substances by ordinary chemical procedures is a (n) _____. They can act as either an acid or a base depending on the context. To understand acids and bases, you need to know more about pure water. The membrane is impermeable to H+. This useful quality is based on water's _____. Which of the following statements about the dissociation of phosphoric acid is true? Mastering Biology 8 5. reduces the hydrogen ion concentration of a solution D. Which pairing matches the type of substance with the item it donates? Biology Chapter 7 Review - Midterm Learn with flashcards, games, and more — for free. 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In water, phosphoric acid dissociates according to the chemical reactions written below. mastering biology multiple choice A substance that cannot be broken down into other substances by ordinary chemical procedures is a (n) _____. What would your food taste like if your mouth was also a very acidic environment? Acids (such as battery acid) are solutions. The interactions of various aqueous solutions—solutions in which water is the solvent—are continuously monitored and adjusted by a large suite of interconnected feedback systems in your body. Not all solutions are acids. produced in the roots, stimulates growth of the developing seed and the adult plant. An aqueous solution An acid is a substance that Increases the hydrogen ion concentration of an aqueous solution Terms in this set (20) Acid A substance that increases the hydrogen ion concentration in a solution Acid precipitation Rain snow or fog with a pH below 5. A fatty acid tail contains lots and lots of C-C bonds. Increasing the amount of succinate molecules to those of malonic acid reduces the inhibitory effect of malonic acid. Study with Quizlet and memorize flashcards containing terms like A substance that reduces the hydrogen ion concentration of a solution is __________. What do these two processes have in common?, To leave the digestive tract, a substance must cross a cell membrane. Acids were originally grouped together by their properties: they taste sour Study with Quizlet and memorize flashcards containing terms like A substance that cannot be broken down into other substances by ordinary chemical procedures is a(n) _____. K. The study of acid-base chemistry involves the exploration of the properties, behaviors, and interactions of acids and bases. 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Chemical Properties characteristics that describe how a substance reacts with other substances to produce different substances Valence Electrons an electron that is found in the outermost shell of an atom and that determines the atom's chemical properties Valence Shell Start studying Mastering Biology Chapter 3 Vocab. Cell Membranes Learn with flashcards, games, and more — for free. Explore the wonders of biology Access easy-to-understand explanations and practical examples on key biology topics, from cells to ecosystems. Buffer Substance that minimizes changes in concentrations of H+ and OH- in solutions Usually and acid-base pair that combines with H+ acid proton donor H+ anything with a ph lower than 7 base A. A substance that cannot be broken down into other substances by ordinary chemical procedures is a (n) _____. An acid is a substance that forms hydrogen ions H + when dissolved in water, and A base is a substance that forms hydroxide ions OH - when dissolved in water. Mastering Biology - Chapter 4 Nucleic Acids All of the genetic material in all living organisms is made from these basic building blocks of nucleotides. , 2. Sometimes it is more helpful to think that the further away from neutral a substance is, the stronger it is in either the acidic or basic direction. g. Water itself is the most famous example. Pure water has a PH of 7, but some cases of acid precipitation have been recorded with a PH close to 3. chemical reaction the process by which one or more substances change to produce one or more different substances Reactants A starting material in a chemical reaction product A substance produced in a chemical reaction Adhesion An attraction between molecules of different substances Cohesion Attraction between molecules of the same substance Study with Quizlet and memorize flashcards containing terms like The partial negative charge in a molecule of water occurs because _____. , What is the arrow pointing to CH. 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Which of the following statements about the dissociation of phosphoric acid is true? PLAY Acid A substance that increases the hydrogen ion (h+) concentration in a solution Adhesion The attraction between different kinds of molecules Aqueous solution A solution in which water is the solvent Atom The smallest unit of matter that retains the properties of an element Atomic mass A substance consists of weak acids or bases designed to maintain a specific pH of a solution within a cell or a biological system. Each of these atoms represents a different Since the three types are combined in a fixed ratio, this means that H2SO4 is a(n), chemistry, atom and more. Explore quizzes and practice tests created by teachers and students or create one from your course material. The citric acid cycle can be compartmentalized from glycolysis. Hydrogen ions (H+) are the only substances that can be pumped across this membrane. (acid) (Base) In this reaction the the base (NH3) in the forward reaction becomes an acid in the reverse reaction which is an example of a conjugate acid-base pair (two substances related to eachother by the transfer of a proton and must be the same type of acid or base) a conjugate acid is any base to which a proton has been added. , The atoms of different phosphorus isotopes _____. 2 Mastering biology How are organisms and their environments subject to basic laws of physics and chemistry Click the card to flip ๐ For example, the use of formic acid by ants to protect themselves against predators and microbial parasites Mastering Biology: Chapter 7 In what way do the membranes of a eukaryotic cell vary? Engage with our Biology Chapter 3 quiz and flashcards. none of the above D the clinging of one substance to another substance Sweating has a cooling effect because of water's high _____. 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A liquid consisting of a homogeneous mixture of two or more substances, consisting of a dissolving agent, called the solvent, and a substance that is dissolved, called the solute. 0 (4 reviews) Which of the following factors would tend to increase membrane fluidity? a lower temperature a greater proportion of unsaturated phospholipids a relatively high protein content in the membrane a greater proportion of saturated phospholipids Study with Quizlet and memorize flashcards containing terms like You are administering a 5% dextrose in water solution to your patient to replace lost fluids and provide carbohydrates to the body. See Concept 3. A solution is a mixture of two or more substances that has the same composition throughout. What can you conclude about NaOH? It is a base. 2. In the solution shown in the image to your left, the solute is sugar, and the solvent is water. 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