Campbell Biology in Focus
3rd Edition
ISBN: 9780134710679
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Rebecca Orr
Publisher: PEARSON
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Question
Chapter 33.1, Problem 2CC
Summary Introduction
To explain:
The requirement of vitamins in very small amounts.
Introduction:
The organic moleculesrequired for the efficient functioning of the enzymes in the
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Understanding how enzymes work
1) Excluding enzymes, for example, that work in the stomach's low pH, describe the working conditions for most enzymes in the human body.
2) Describe the effect of enzymes on the rate of reactions that they catalyze.
3) Define the transition state in a chemical reaction and how an enzyme functions during the transition state.
8). Which statement best describes
1 point
the enzyme represented in the
graphs?
O 10 20 30 40 50 60
O 2 4 6
10 12
Temperature ("C)
PH
(1) This enzyme works best at a
temperature of 50°C and a pH of 12.
(2) Temperature and pH have no effect on
the action of this enzyme.
(3) This enzyme works best at a
temperature above 50°C and a pH above 12.
(4) This enzyme works best at a
temperature of 35°C and a pH of 8.
Relative Rate of
Enzyme Action
Relative Rate of
Enzyme Action
Estimate the concentration of an enzyme in a living cell. Assume that fresh tissue is 80% water and all of it is intracellular, the total soluble protein in a cell represents 15% of the weight, all the soluble proteins are enzymes, the average weight of a protein is 150000 and about 1000 different enzymes are present.
Chapter 33 Solutions
Campbell Biology in Focus
Ch. 33.1 - An animal requires 20 amino acids to make...Ch. 33.1 - Prob. 2CCCh. 33.1 - WHAT IF? if a zoo animal eating ample food shows...Ch. 33.2 - Prob. 1CCCh. 33.2 - In what sense are nutrients from a recently...Ch. 33.2 - Prob. 3CCCh. 33.3 - How does swallowed food reach the stomach of a...Ch. 33.3 - Explain why a proton pump inhibitor, such as the...Ch. 33.3 - Prob. 3CCCh. 33.4 - Prob. 1CC
Ch. 33.4 - Prob. 2CCCh. 33.4 - Prob. 3CCCh. 33.5 - Prob. 1CCCh. 33.5 - The energy required to maintain each gram of body...Ch. 33.5 - Prob. 3CCCh. 33 - The mammalian trachea and esophagus both connect...Ch. 33 - Which organ is incorrectly paired with its...Ch. 33 - Which of the following is not a major activity of...Ch. 33 - Prob. 4TYUCh. 33 - Prob. 5TYUCh. 33 - If you were to jog 1 km a few hours after lunch,...Ch. 33 - Prob. 7TYUCh. 33 - FOCUS ON EVOLUTION The human esophagus and trachea...Ch. 33 - Prob. 9TYUCh. 33 - Prob. 10TYU
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- In the Electron Transport Chain:(a). What are the two nucleotide molecules that are involved in funneling the electrons into the chain?(b). Indicate all the reactions (in the pathways) that are involved in the transfer of the electrons to these two nucleotides.arrow_forwardState and describe the roles of the six classes of enzymes, giving three examples eacharrow_forwardExplain the induced-fit model of enzymes function and describe the catolytic cycle of an enzymearrow_forward
- Explain the induced fit model of how enzymes workarrow_forwardBiochemistry: Diagram the biosynthetic pathway from precursors (like amino acids, PRPP, etc.) to dTTP. Provide complete intermediate structures and names (you can use abbreviations for names, e.g., dTTP) but names of enzymes and any cofactor(s)/substrates will suffice.arrow_forwardA) Myth: Enzymes are specific for one substrate. Fact: Like most enzymes, alliinase can act on multiple different substrates. Explain why most enzymes can act on more than one substrate compound. (Refer to the “Alliin-like Substrates" panel in your answer.)arrow_forward
- Hb serves as our model for regulation of enzyme reaction rates. But Hb is not an enzyme. Explain the reasoning of Jacque Monod and his colleagues for invoking Hb as a "model enzyme."arrow_forwardBriefly describe 1 way which enzyme activity can be regulated in the cell. How do the kinetics of a regulatory enzyme differ from a non-regulated enzyme?arrow_forwardComplete Some enzymes require additional ...........................to catalyze reactions effectively. These could be small organic molecules or ........................... ions.arrow_forward
- Consider the three-dimensional model of the tertiary structure of an enzyme below. Amino acids involved in binding are shaded blue, and amino acids involved in catalysis are shaded red.arrow_forwardOur body temperature is sometimes unstable (hotter or cooler than normal temperature). What can happen inside the cells if the temperature changes? Explain the connection to enzyme work!arrow_forwardExplain the importance of energy and entropy for living cells. State the role of enzymes in controlling metabolic biochemistry. Describe how catabolism converts many complex food molecules to a few kinds of catabolites. Explain how catabolism yields energy and how the energy is stored for use. Describe how the energy carriers ATP and NADH transfer energy between energy-yielding and energy-spending reactions. Describe how sugar is catabolized to pyruvate via glycolysis, along with production of ATP and NADH. Explain how pyruvate can be further TCA cycle (when oxygen is available). polized by fermentation or by the Explain how bacterial catabolic reactions are used in clinical tests to identify a pathogen. Define and explain the importance of nitrogen fixationarrow_forward
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