CAMPBELL MASTERING BIOLOGY ACCESS>I<
18th Edition
ISBN: 9781323766286
Author: Pearson
Publisher: PEARSON
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Chapter 6, Problem 8TYU
SCIENTIFIC INQUIRY
DRAW IT A researcher has developed an assay to measure the activity of an important enzyme present in liver cells growing in culture. She adds the enzyme’s substrate to a dish of cells and then measures the appearance of reaction products. The results are graphed as the amount of product on the y-axis versus time on the x-axis. The researcher notes four sections of the graph. For a short period of time, no products appear (section A). Then (section B) the reaction rate is quite high (the slope of the line is steep). Next, the reaction gradually slows down (section C). Finally, the graph line becomes flat (section D). Draw and label the graph, and propose a model to explain the molecular events occurring at each stage of this reaction profile.
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You design an experiment to explore the effects of enzyme concentration on the rate of glucose (product) production. In the experiment, you prepare 5 tubes with equal amounts of water and substrate but altered the amount of enzyme. Tube #1 did not have enzyme, Tube #2 had 100 mg of enzyme, Tube #3 had 200 mg of enzyme, Tube #4 had 300 mg of enzyme, Tube #5 had 400 mg of enzyme. The results are summarized in the graph.
Select all that apply.
Given enough time all tubes (#1-5) would reach 1100 mg/dL.
The substrate in tube #1 was denatured at 40 minutes.
The fastest rate of reaction was in Tube #4.
Adding more enzyme to Tube #5 at 40 minutes would produce more product.
Tube #4 and #5 have run out of substrate at 40 minutes.
Identify the structures labeled in the image below.
The enzyme labeled A is ____. Label B is the _____ strand of DNA, label C is the ____ strand of DNA, and label D are ________
You have cloned a gene for an enzyme in E.coli and want to increase its catalytic activity. Describe how you would achieve this if you know the DNA sequence of the gene but not the regions of the enzyme that are important for its catalytic activity
Chapter 6 Solutions
CAMPBELL MASTERING BIOLOGY ACCESS>I<
Ch. 6.1 - MAKE CONNECTIONS How does the second law of...Ch. 6.1 - Describe the forms of energy found in an apple as...Ch. 6.2 - Cellular respiration uses glucose and oxygen,...Ch. 6.2 - Prob. 2CCCh. 6.2 - Prob. 3CCCh. 6.3 - How does ATP typically transfer energy from...Ch. 6.3 - Prob. 2CCCh. 6.3 - MAKE CONNECTIONS Does Figure 6.10a show passive or...Ch. 6.4 - Many spontaneous reactions occur very slowly. Why...Ch. 6.4 - Why do enzymes act only on very specific...
Ch. 6.4 - WHAT IF? Malonate is an inhibitor of the enzyme...Ch. 6.5 - How do an activator and an inhibitor have...Ch. 6 - Choose the pair of terms that correctly completes...Ch. 6 - Prob. 2TYUCh. 6 - Which of the following metabolic processes can...Ch. 6 - If an enzyme in solution is saturated with...Ch. 6 - Some bacteria are metabolically active in hot...Ch. 6 - If an enzyme is added to a solution where its...Ch. 6 - DRAW IT Using a series of arrows, draw the...Ch. 6 - SCIENTIFIC INQUIRY DRAW IT A researcher has...Ch. 6 - SCIENCE, TECHNOLOGY, AND SOCIETY Organophosphates...Ch. 6 - FOCUS ON EVOLUTION A recent revival of the...Ch. 6 - FOCUS ON ENERGY AND MATTER Life requires energy....Ch. 6 - SYNTHESIZE YOUR KNOWLEDGE Explain what is...
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- Which of the following describes a reaction that requires substrate 1 to bind the the enzyme, then substrate 2 binds, and then the products are produced? A. No ternary complex B. Ordered ternary complex C. Ping-Pong D. Random ternary complexarrow_forwarddraw the enzyme binding pocket and active site draw the curved arrows showing the reaction proceeding toward the products show how the enzyme facilitates the reaction write a description of how the enzyme works Propose a name for the enzyme based on the rules from classarrow_forwardIn a highly high-temperature environment, you placed an enzyme and some substrates. You've seen that there hasn't been any reaction. Applying what you have learned on enzyme activity, how would you explain what occurred? A. The enzyme was not placed at a pH level that would allow it to react at its maximum rate. B. There are not enough enzymes for the reaction to occur. C. The enzyme may have denatured or broken down due to the high temperature of the environment, resulting in no reaction. D. There are not enough substrates for reaction to occur. Substrate concentration affects enzyme activity. Determine what would occur when there are too many substrates and fewer enzymes? A. No enzyme activity would occur. B. The reaction rate would continuously increase. C. The reaction would speed up tremendously. D. Maximal rate of reaction would occur. Enzyme activity mainly involves the active site and the substrate. How would you compare the active site from the substrate? A. The substrate…arrow_forward
- Describe what is happening at the low, middle, and high points in the graph you made on the previous page. Be sure to use your knowledge of enzymes to explain the results of the experiment.arrow_forwardThe diagram shows the mechanism of a general enzyme‑catalyzed reaction. Put the labels in the correct locations. The abbreviations E, P and S indicate the enzyme, product, and substrate, respectively.arrow_forwardMolecule A is the substrate for the enzyme shown below. What process is diagrammed in this figure? A) metabolism B) allosteric inhibition C) catalysis D) active site inhibition E) competitive inhibitionarrow_forward
- The image shows the rate of an enzyme reaction under conditions of no inhibition, competitive inhibition, and noncompetitive inhibition as reactions labeled uninhibited, A, and B. Which of the following best explains what has occurred in the enzyme reactions? Reaction B shows competitive inhibition, where increased substrate competes with inhibitors for the active site. Reaction A shows noncompetitive inhibition, where increased substrate competes with inhibitors for the active site. Reaction A shows competitive inhibition, where increased substrate does not affect the enzyme’s binding with the inhibitor. Reaction B shows noncompetitive inhibition, where increased substrate does not affect the enzyme’s binding with the inhibitor.arrow_forwardA biologist investigating enzyme function plotted the activity of a particular enzyme (y-axis) vs pH (x-axis). Experiment A was performed at 30 oC, experiment B at 10 oC and experiment C at 100 oC. Experiments A, B, and C all used the same type of enzyme, they simple tested the enzyme's activity at different temperatures. Using your knowledge of enzyme activity, answer the questions based on the results shown in the graph. (Answer questions A) Graph included A. Explain why A and B are so different.arrow_forwardThe purpose of this experiment is to determine how the activity of an enzyme can change under certain conditions: temperature, pH, substrate concentration Introduction Purpose statement is specific, complete and uses proper scientific vocabulary Hypothesis statement is clear, logical and scientifically sound Contains sufficient background information relevant to the lab Accurate use of examples and scientific terminology Clear, concise (max 1 page; single spaced) Step 1: Obtain a sample amount of a hard fruit or vegetable, such as an apple, cut it into smaller equal pieces, and measure on a digital scale of 10g. Step 2: Get 100ml of room temperature tap water and add it into a glass cup, heat it on a hot plate until reaches 37 Celsius Step 3: Add the apple sample into the glass cup with the tap water and mix gently. Let the mixture to sit for 5 minutes. Step 4: With a kitchen thermometer measure the temperature of the apple mixture. Step 5: In a glass cup add 3mL of 3% hydrogen…arrow_forward
- Why is an enzyme considered "specific"? A. Only one type of enzyme is found in our bodies B. Only certain enzymes can pass through the cell membrane C. Its active site must match the substrate to do its job D. The enzyme can only move from high to low concentrationarrow_forwardA biologist investigating enzyme function plotted the activity of a particular enzyme (y-axis) vs pH (x-axis). Experiment A was performed at 30 oC, experiment B at 10 oC and experiment C at 100 oC. Experiments A, B, and C all used the same type of enzyme, they simple tested the enzyme's activity at different temperatures. Using your knowledge of enzyme activity, answer the questions based on the results shown in the graph. (Answer question B) Graph included B. Why is there no hill in the middle of line C?arrow_forwardthe type of enzyme inhibition in which covalent bulky adduct prevents catalysis is ? a) uncompetitive b) reversible c) noncompetitive d) competitive e) Irreversiblearrow_forward
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Enzyme Kinetics; Author: MIT OpenCourseWare;https://www.youtube.com/watch?v=FXWZr3mscUo;License: Standard Youtube License