Campbell Biology in Focus, Books a la Carte Edition; Modified Mastering Biology with Pearson eText - ValuePack Access Card - for Campbell Biology in Focus (2nd Edition)
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Chapter 6, Problem 7TYU

DRAW IT Using a series of arrows, draw the branched metabolic reaction pathway described by the following statements. Then answer the question at the end. Use red arrows and minus signs to indicate inhibition.

L can form either M or N.

M can form O .

O can form either P or R.

P can form Q .

R can form S.

O inhibits the reaction of L to form M.

Q inhibits the reaction of O to form P.

S inhibits the reaction of O to form R.

Which reaction would prevail if both Q and S were present in the cell at high concentrations?

  1. A.    L → M
  2. B.     M → O
  3. C.     L → N
  4. D.    O → P
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DRAW IT Using a series of arrows, draw the branched metabolicreaction pathway described by the following statements, andthen answer the question at the end. Use red arrows and minussigns to indicate inhibition.L can form either M or N.M can form O.O can form either P or R.P can form Q.R can form S.O inhibits the reaction of L to form M.Q inhibits the reaction of O to form P.S inhibits the reaction of O to form R.Which reaction would prevail if both Q and S were present inthe cell in high concentrations?(A) L S M(B) M S O(C) L S N(D) O S P
The enzyme glutamine synthetase catalyzes the following reaction: glutamate + ATP + NH3 → glutamine + ADP + phosphate Which of the following statements about this reaction is correct?   he reaction is only exergonic if enzyme is added   b.   The reaction is endergonic whether or not enzyme is added   c.   The reaction is exergonic whether or not enzyme is added   d.   The rate of oxygen production will be unaffected   e.   The reaction is only endergonic if enzyme is added
Consider the analogy of the jiggling box containing coins that was described on page 85. The reaction, the flipping of coins that either face heads up (h) or tails up (T), is described by the equation h ↔ T, where the rate of the forward reaction equals the rate of the reverse reaction.a. What are ΔG and ΔG° in this analogy? b. What corresponds to the temperature at which the reaction proceeds? What corresponds to the activation energy of the reaction? assume you have an “enzyme,” called jigglase, which catalyzes this reaction. What would the effect of jigglase be and what, mechanically, might jigglase do in this analogy?

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