Homework Answers
15 ) answer will be Diffusion of water through a differentially permeable membrane is called C) Osmosis.
Osmosis is a process by which solvents moves through a semipermeable membrane from low concentrated solution ( more solvents) to high concentrated solution ( less solvents)..
16) answer Will be When an animal cells is placed in a hypertonic solution A) Plasmolysis will occur..
On placing in hypertonic solution ,the solution from cell will come outside and cell will shrink in size.
17( answer will be The point on the enzyme where the enzyme causes the substrate to change is B) Active site..
Active site is the binding site of the enzyme..
18) A given enzyme works on D) One type of substrate..
19) the match one is
D) Central vacuole - storage..
It store the water and waste substances in plant cell.
20) Enzymes are D) Proteins..
21) It is false that enzymes
D) used up in a reaction..
22) The substrate is A ) a material that is changed by enzymes..
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15. Diffusion of water through a differentially permeable membrane is called A. active transport. B. energy....
The liver is involved in detoxification of many poisons and drugs. Which of the following structures...
The liver is involved in detoxification of many poisons and drugs. Which of the following structures is primarily involved in this process and therefore abundant in liver cells? A) rough ER B) smooth ER C) Golgi apparatus D) nuclear envelope E) transport vesicles Which of the following produces and modifies polysaccharides that will be secreted? A) lysosome B) vacuole C) mitochondrion D) Golgi apparatus E) peroxisome Which organelle often takes up much of the volume of a plant cell? A)...
Enzymes are biological catalysts and Unction by A) increasing the free energy in a system. B)...
Enzymes are biological catalysts and Unction by A) increasing the free energy in a system. B) lowering the activation energy of a reaction. C) lowering entropy in a system. D) increasing the temperature near a reaction. E) altering the equilibrium of a reaction. Which of the following contributes to the specificity of enzymes? A) Each enzyme has a wide range of temperature and pH optimum B) Each enzyme has an active site that interacts with many C) Substrates themselves may...
Enzyme 6. Where do substrates bind on an enzyme? A. allosteric site B. active site C....
Enzyme 6. Where do substrates bind on an enzyme? A. allosteric site B. active site C. receptor D. ion channel 7. Enzymes are capable of increasing the rate of a chemical reaction through which of the following means? A. changing AG from positive to negative B. reducing the activation energy C. changing the equilibrium point of the reaction D. increasing kinetic energy 8. When a molecule can occupy the same active site as the substrate, a situation called can result...
1) Substrates bind in the ____ of enzymes, which chemically alter the substrate forming a _____,...
1) Substrates bind in the ____ of enzymes, which chemically alter the substrate forming a _____, which is released by the enzyme. Select one: a. Promoter; pathway b. Quaternary structure; covalent bonds c. Substrate pocket; new substrate d. Active site; product e. Proteins; partial charge 2) Anyssa is lactose intolerant. She is unable to anabolize lactose. Select one: True False
12. Which of the following statements is true of enzyme catalysts? A B C To be...
12. Which of the following statements is true of enzyme catalysts? A B C To be effective, they must be present at the same concentration as their substrate. They can increase the equilibrium constant for a given reaction by a thousand-fold or more. They lower the activation energy for conversion of substrate to product. Their catalytic activity is independent of pH. They are generally equally active on D and L isomers of a given substrate. D E 13. In competitive...
The active site of an enzyme ____. A. is remote form the site of substrate attachment...
The active site of an enzyme ____. A. is remote form the site of substrate attachment B. is converted to a product C. is the region where the reaction takes place D. increases the energy of reaction E. includes the entire enzyme In the lock-and-key model of enzyme actin, the enzyme active site is thought of as ___. A. a rigid, nonflexible shape that fits the substrate exactly B. an area of the enzyme that can adjust to fit the...
37. In the lab cellular processes the dialysis tubing represented what? A. Cell wall B. Capsule...
37. In the lab cellular processes the dialysis tubing represented what? A. Cell wall B. Capsule C. Nucleus D. Plasma membrane E. Ribosome 38. A scientist is studying an unknown cell under the microscope. She observes that the cell has a nucleus, a cell wall, and a large central vacuole. Based on these observations she can conclude that the cell is most likely A. An archaea B. A bacteria cell C. An animal cell D. A plant cell E. A...
Question 89 Gluconeogenesis is the A) Result of amylase activity B) Formation of glycogen C) Formation...
Question 89 Gluconeogenesis is the A) Result of amylase activity B) Formation of glycogen C) Formation of starches D) Formation of glucose from simple two and three-carbon precursors Question 90 The only known regulatory mechanism for pyruvate carbora A) Activation by acetyl Co4 B) Activation by phosphorylation C) Activation by CAMP D) Activation by NADH 20 5 Question 87 Isozymes are enzymes A) From one species that catalyze the same reaction B) From different species that catalyze the same reaction...
1. A catalyst enhances the reaction rate by: a. Adding energy to the reaction b. Increasing...
1. A catalyst enhances the reaction rate by: a. Adding energy to the reaction b. Increasing the activation energy required for the reaction c. Reducing the activation energy required for the reaction d. Improving binding of the product to the active site 2. Numerical answer: During aerobic respiration how many ATP molecules are produced by the oxidation of a single molecule of pyruvate? 3. The trace elements magnesium and zinc, which are required for bacterial growth, are typically used as:...
The liver is involved in detoxification of many poisons and drugs. Which of the following structures is primarily involved in this process and therefore abundant in liver cells? A) rough ER B) smooth ER C) Golgi apparatus D) nuclear envelope E) transport vesicles Which of the following produces and modifies polysaccharides that will be secreted? A) lysosome B) vacuole C) mitochondrion D) Golgi apparatus E) peroxisome Which organelle often takes up much of the volume of a plant cell? A)...
Enzymes are biological catalysts and Unction by A) increasing the free energy in a system. B) lowering the activation energy of a reaction. C) lowering entropy in a system. D) increasing the temperature near a reaction. E) altering the equilibrium of a reaction. Which of the following contributes to the specificity of enzymes? A) Each enzyme has a wide range of temperature and pH optimum B) Each enzyme has an active site that interacts with many C) Substrates themselves may...
Enzyme 6. Where do substrates bind on an enzyme? A. allosteric site B. active site C. receptor D. ion channel 7. Enzymes are capable of increasing the rate of a chemical reaction through which of the following means? A. changing AG from positive to negative B. reducing the activation energy C. changing the equilibrium point of the reaction D. increasing kinetic energy 8. When a molecule can occupy the same active site as the substrate, a situation called can result...
12. Which of the following statements is true of enzyme catalysts? A B C To be effective, they must be present at the same concentration as their substrate. They can increase the equilibrium constant for a given reaction by a thousand-fold or more. They lower the activation energy for conversion of substrate to product. Their catalytic activity is independent of pH. They are generally equally active on D and L isomers of a given substrate. D E 13. In competitive...
The active site of an enzyme ____. A. is remote form the site of substrate attachment B. is converted to a product C. is the region where the reaction takes place D. increases the energy of reaction E. includes the entire enzyme In the lock-and-key model of enzyme actin, the enzyme active site is thought of as ___. A. a rigid, nonflexible shape that fits the substrate exactly B. an area of the enzyme that can adjust to fit the...
37. In the lab cellular processes the dialysis tubing represented what? A. Cell wall B. Capsule C. Nucleus D. Plasma membrane E. Ribosome 38. A scientist is studying an unknown cell under the microscope. She observes that the cell has a nucleus, a cell wall, and a large central vacuole. Based on these observations she can conclude that the cell is most likely A. An archaea B. A bacteria cell C. An animal cell D. A plant cell E. A...
Question 89 Gluconeogenesis is the A) Result of amylase activity B) Formation of glycogen C) Formation of starches D) Formation of glucose from simple two and three-carbon precursors Question 90 The only known regulatory mechanism for pyruvate carbora A) Activation by acetyl Co4 B) Activation by phosphorylation C) Activation by CAMP D) Activation by NADH 20 5 Question 87 Isozymes are enzymes A) From one species that catalyze the same reaction B) From different species that catalyze the same reaction...
1. A catalyst enhances the reaction rate by: a. Adding energy to the reaction b. Increasing the activation energy required for the reaction c. Reducing the activation energy required for the reaction d. Improving binding of the product to the active site 2. Numerical answer: During aerobic respiration how many ATP molecules are produced by the oxidation of a single molecule of pyruvate? 3. The trace elements magnesium and zinc, which are required for bacterial growth, are typically used as:...
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