Which of the following statements is a lie? Select one: a. Chemical energy is the energy within chemical bonds. Energy is required for bonds to break while energy is released when bonds form. b. Exergonic chemical reactions release more energy than they absorb and the catabolism of the food in an energy bar serves as an example. c. The many forms of energy used up by cells comes from the breakdown of the chemical energy from the food we digest.

Enzymes are: [Select all that apply.] O mostly proteins. molecules that are a main source of energy for most cells. molecules that catalyze (speed up) other chemical reactions. O molecules that have specific shape that bind specific molecules. O waste products from most cellular chemical reactions. O used up in the chemical reactions that they catalyze.

Which of the following statements is TRUE regarding the structure of enzymes? The shape of enzymes change to fit all types of substrates. O Enzymes are usually lipids. O Enzymes are denatured once they are used in a chemical reaction. O The active site is where the enzyme binds with the substrate.

Which of the following statements is NOT true?   None of the other four answers (all are true) The energy required to cause a chemical reaction to occur is called the activation energy Decomposition (degradation, catabolic) reactions are usually endergonic Chemical reactions in living cells are catalyzed by enzymes Enzymes increase the probability that a chemical reaction will take place by lowering the activation energy

SECTION 1: ACTIVATION ENERGY The picture to the right shows someone trying to push a boulder up a hill. In order for the boulder to reach its final destination at point B, it must be pushed to the top of the hill because once it reaches the top of the hill it will roll down the rest of the way. A similar scenario exists in chemistry, before a chemical reaction will take place, energy must be put into the system. The energy needed for a chemical reaction to move from point A to the top of the hill is known as activation energy, also written as Ea. Increasing Energy. Activation Energy Activation Energy Energy Content of Reactants A + B Reactants FIGURE 3 J Progress of Reaction. t $ Uncatalyzed Reaction (without enzyme) Energy Content of Products V FIGURE 2 Catalyzed Reaction (with enzyme) C + D Products A م اسکار (TIME) 3. Compare Figure 3 above to the Figure 1 (comparing the heights of 2 mountains), determine how using an enzyme in a chemical reaction impacts the reaction by answering…

Which of the following is false concerning ATP? A The first and second phosphate bonds contain a lot of energy used to power cellular functions. It contains lots of potential energy. Is made by bonding ADP with a phosphate during cellular respiration. D) Requires the actions of enzymes.

Describe 3 different types of energy.

When ATP is formed: A Entropy occurs B Kinetic energy is being transformed into potential energy An endergonic reaction is taking place D All of these

Which of the following is a reactive oxygen species that can damage proteins? Select one: a. vitamin C b. superoxide c. arsenic d. oxygen e. heat

The model below shows a chemical reaction that takes place in cells. B Which statement correctly describes the details of the reaction shown above? A A polymer is built from monomers as water is removed. U HO-1 2 3 с HO- 1 2 3 H HO D H₂O A lipid polymer is built from monomers as water is removed. A polymer is hydrolyzed into its component monomers as water is added. Adhesion is occurring between water molecules. -H