BIOL:CONCEPT+INVEST.ETEXT
5th Edition
ISBN: 9781264154173
Author: Hoefnagels
Publisher: MCG
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Chapter 6.9, Problem 2MC
Why must the first
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Why was the development of enzymes fundamental to the evolution of life?
a) without enzymes, the activation energy for essential reactions was too low
b) enzymes allowed for high rate of catalysis at relatively low temperatures
c) enzymes reduced the cellular demand for ATP
d) enzymes allowed for reactions to occur spontaneously
Is it likely that any metabolic pathway can exist without control mechanisms?
What role did symbiosis play in the origin of mitochondria?
Chapter 6 Solutions
BIOL:CONCEPT+INVEST.ETEXT
Ch. 6.1 - Why do all organisms need ATP?Ch. 6.1 - What are the three general ways to generate ATP...Ch. 6.1 - Prob. 3MCCh. 6.1 - Prob. 4MCCh. 6.2 - Prob. 1MCCh. 6.2 - What occurs in each of the three stages of...Ch. 6.3 - Prob. 1MCCh. 6.3 - Prob. 2MCCh. 6.4 - Prob. 1MCCh. 6.4 - Prob. 2MC
Ch. 6.4 - Prob. 3MCCh. 6.5 - Prob. 1MCCh. 6.5 - Prob. 2MCCh. 6.5 - Prob. 3MCCh. 6.5 - Prob. 4MCCh. 6.6 - Prob. 1MCCh. 6.6 - How does the actual ATP yield compare to the...Ch. 6.7 - Prob. 1MCCh. 6.7 - Prob. 2MCCh. 6.8 - Prob. 1MCCh. 6.8 - Prob. 2MCCh. 6.8 - Prob. 3MCCh. 6.9 - Prob. 1MCCh. 6.9 - Why must the first metabolic pathways have been...Ch. 6.9 - What is the evidence that photosynthesis may have...Ch. 6.10 - What hypothesis were the researchers testing, and...Ch. 6.10 - Prob. 2MCCh. 6 - Which of the following best describes aerobic...Ch. 6 - Which stage in cellular respiration produces the...Ch. 6 - What is the role of ATP synthase? a. It uses ATP...Ch. 6 - Prob. 4MCQCh. 6 - Prob. 5MCQCh. 6 - What is endosymbiosis? a. A type of fermentation...Ch. 6 - Respiration contains the Latin word root spiro,...Ch. 6 - All steps of cellular respiration are closely...Ch. 6 - How might a mitochondrion's double membrane make...Ch. 6 - Health-food stores sell a product called pyruvate...Ch. 6 - At what point does O2 enter the energy pathways of...Ch. 6 - Describe the energy pathways that are available...Ch. 6 - Prob. 7WIOCh. 6 - Describe how aerobic respiration occurs in...Ch. 6 - Prob. 9WIOCh. 6 - Explain the fact that species as diverse as humans...Ch. 6 - Prob. 11WIOCh. 6 - Prob. 1PITCh. 6 - Prob. 2PITCh. 6 - Prob. 3PITCh. 6 - Where would fermentation, anaerobic respiration,...
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- What is the major role of hydrogen ions in cellular respiration? A) To make water B To act as an electron acceptor To act as the energy source D) To power the actions of ATP synthasearrow_forwardWhat is the origin and function of terra preta?arrow_forwardWhich term describes how a cell regulates a metabolic pathway when the product of the pathway inhibits the enzyme that controls its formation (as the product accumulates it binds to an enzyme in the pathway and prevents it from working)?arrow_forward
- What is meant by the term cellular respiration? A. The process by which cells breath B. The process by which cells make their own food by assembling chemical bonds. C. The process by which cells break down the chemical bonds in food to get energy D. The process by which cells make oxygen for us to use in our bodies.arrow_forwardWhich out of the following statements is true about the regulation of metabolic pathway? a) Most of the metabolic pathways are regulated b) Most of the metabolic pathways are not regulated c) Regulation of metabolic pathways always involves changing the amount of enzymes d) Metabolic regulation always depends on control by hormonesarrow_forwardA researcher interested in investigating the genetic relationship of mitochondria to bacteria must decide on the best method to study this. What advice would you give the researcher?arrow_forward
- Would you describe metabolic pathways as inherently wasteful or inherently economical, and why?arrow_forwardWhy is a metabolic route with a high number of stages advantageous?arrow_forwardHow did the discovery of ribozymes affect our understanding of the origin of life and the RNA world? A) The discovery of ribozymes demonstrated that enzymes did not have to be proteins, and that RNA can store, transmit, and do biological work as an enzymatic molecule. B) The discovery of ribozymes helped us understand why RNA only stores and transmits biological data, but does not act as an enzymatic molecule. C) The discovery of ribozymes verified that enzymes had to be proteins. This discovery helped to eliminate other theories about the origin of life in RNA world. D) The discovery of ribozymes demonstrated definitively that ribozymes function only as an enzymatic molecule and therefore evolved before information carrier molecules.arrow_forward
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