Cellular respiration is an exothermic reaction and photosynthesis is an endothermic reaction. How does the required activation energy compare for these two reactions?(1 point) Responses Cellular respiration needs a higher amount of energy to activate the reaction because the products are at a lower energy state than the reactants. Cellular respiration needs a higher amount of energy to activate the reaction because the products are at a lower energy state than the reactants. Photosynthesis needs a higher amount of energy to activate the reaction because the products are at a lower energy state than the reactants. Photosynthesis needs a higher amount of energy to activate the reaction because the products are at a lower energy state than the reactants. Cellular respiration needs a smaller amount of energy to activate the reaction because the products are at a lower energy state than the reactants. Cellular respiration needs a smaller amount of energy to activate the reaction because the products are at a lower energy state than the reactants. Photosynthesis needs a smaller amount of energy to activate the reaction because the products are at a lower energy state than the reactants.
Cellular respiration needs a smaller amount of energy to activate the reaction because the products are at a lower energy state than the reactants.
How do enzymes affect chemical reactions?(1 point) Responses They provide activation energy. They provide activation energy. They eliminate activation energy. They eliminate activation energy. They increase activation energy. They increase activation energy. They lower activation energy.
They lower activation energy.
Which lists the correct order of steps involved in the formation of an enzyme-substrate complex?(1 point) Responses enzyme binds to substrate at active site > enzyme-substrate complex forms > chemical reaction takes enzyme binds to substrate at active site > enzyme-substrate complex forms > chemical reaction takes chemical reaction takes place > products are released > enzyme binds to substrate at active site > enzyme-substrate complex forms chemical reaction takes place > products are released > enzyme binds to substrate at active site > enzyme-substrate complex forms enzyme binds to substrate at active site > chemical reaction takes place > products are released > enzyme-substrate complex forms enzyme binds to substrate at active site > chemical reaction takes place > products are released > enzyme-substrate complex forms enzyme-substrate complex forms > enzyme binds to substrate at active site > chemical reaction takes place > products are released
enzyme binds to substrate at active site > enzyme-substrate complex forms > chemical reaction takes place > products are released
Protease is an enzyme in the human body that catalyzes a chemical reaction in which proteins are broken down into smaller molecules so that the body can use them. Which is a likely outcome if protease does not function properly?(1 point) Responses The activation energy needed for the chemical reaction will be lowered. The activation energy needed for the chemical reaction will be lowered. The body will use a different enzyme to catalyze the chemical reaction. The body will use a different enzyme to catalyze the chemical reaction. The chemical reaction will not occur, and the body will not be able to absorb the protein it needs. The chemical reaction will not occur, and the body will not be able to absorb the protein it needs. The cells of the digestive system will increase in temperature and catalyze the reaction.
The chemical reaction will not occur, and the body will not be able to absorb the protein it needs.
How does temperature affect enzyme activity in a chemical reaction?(1 point) Responses The rate of a chemical reaction initially increases with decreasing temperature and then decreases, eventually stopping, when the temperature gets too low. The rate of a chemical reaction initially increases with decreasing temperature and then decreases, eventually stopping, when the temperature gets too low. The rate of a chemical reaction initially increases with increasing temperature and then decreases, eventually stopping, when the temperature gets too high. The rate of a chemical reaction initially increases with increasing temperature and then decreases, eventually stopping, when the temperature gets too high. The rate of a chemical reaction always decreases with increasing temperature and always increases with decreasing temperature. The rate of a chemical reaction always decreases with increasing temperature and always increases with decreasing temperature. The rate of a chemical reaction initially increases with increasing temperature and continues to increase indefinitely as temperature continues to increase.
The rate of a chemical reaction initially increases with increasing temperature and then decreases, eventually stopping, when the temperature gets too high.
Photosynthesis requires a higher amount of energy to activate the reaction compared to cellular respiration. This is because photosynthesis is an endothermic reaction, meaning it requires energy input from the surroundings to proceed. In photosynthesis, light energy from the sun is absorbed by chlorophyll molecules in the chloroplasts of plants. This energy is then used to convert carbon dioxide and water into glucose and oxygen. The absorbed light energy provides the activation energy needed to initiate the reaction.
On the other hand, cellular respiration is an exothermic reaction, meaning it releases energy. It occurs in the mitochondria of cells and involves the breakdown of glucose to produce ATP (adenosine triphosphate), which is the energy currency of cells. Since cellular respiration releases energy, the activation energy required for this reaction is lower compared to photosynthesis.
To summarize, photosynthesis requires a higher amount of activation energy because it is an endothermic reaction that requires energy input from the surroundings, while cellular respiration, being exothermic, requires a lower amount of activation energy because it releases energy.