Biology: The Dynamic Science (MindTap Course List)
4th Edition
ISBN: 9781305389892
Author: Peter J. Russell, Paul E. Hertz, Beverly McMillan
Publisher: Cengage Learning
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Textbook Question
Chapter 6, Problem 10TYK
Which of the following statements is incorrect?
a. Ribozymes can link amino acids to form protein.
b. Ribozymes can act as enzymes.
c. Ribozymes can act as informational molecules.
d. Ribozymes are suggested as the first molecules of life.
e. Ribozymes are proteins.
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Miller-Urey type experiments have shown that simple organic molecules like amino acids can be produced from inorganic material. While this offers a first step in explaining how life came to be, it does not explain how complex life came to be. It is thought that RNA may have played an important role in transitioning from a world without life to a world with cells, particularly because of RNA’s ability to form ribozymes.
Why are ribozymes important?
Ribozymes are able to build DNA.
Ribozymes can be held inside a vesicle.
Ribozymes are able to catalyze reactions and replicate themselves.
Ribozymes are the simplest macromolecules able to contain genetic information.
Why are cattle able to survive, grow, and reproduce on a plant diet which does not contain most of the essential amino acids required for their health?
Select one:
a.
Their saliva has cellulase and can therefore digest cellulose present in plant cell walls
b.
Like rabbits, cattle can re-ingest their feces
c.
Bacteria in their rumen synthesize essential amino acids from digested plant material
d.
They are unique in that they can synthesize all essential amino acids in their liver from a variety of metabolic precursors
e.
They are autotrophs
Which of the following statements is NOT TRUE about the "lipid divide"?
a. Refers to the origin of energy-generating organelles in Eukaryotes.
b. Discusses the presence of pseudomurein in the cell membrane of Archaea as opposed to the presence of peptidoglycan in bacterial cell membranes.
c. It implies that ether-glycerol linkages in the plasma membrane set Archaea apart from Bacteria and Eukarya.
d.It refers to the unique composition of the phospholipids of the cell membrane among the three domains.
Chapter 6 Solutions
Biology: The Dynamic Science (MindTap Course List)
Ch. 6.1 - Prob. 1SBCh. 6.1 - In thermodynamics, what is meant by an isolated...Ch. 6.2 - Prob. 1SBCh. 6.2 - Prob. 2SBCh. 6.2 - Distinguish between exergonic and endergonic...Ch. 6.3 - Prob. 1SBCh. 6.3 - How are coupled reactions important to cell...Ch. 6.4 - How do enzymes increase the rates of the reaction...Ch. 6.4 - Can enzymes alter the G of a reaction?Ch. 6.5 - Prob. 1SB
Ch. 6.5 - What is the difference between competitive and...Ch. 6.5 - Prob. 3SBCh. 6.6 - Prob. 1SBCh. 6 - The capacity to do work best defines: a metabolic...Ch. 6 - The assembly of proteins from amino acids is best...Ch. 6 - When two glucose molecules react to form maltose:...Ch. 6 - When glucose reacts with ATP to form...Ch. 6 - In the following graph: A represents the product....Ch. 6 - Which of the following methods is not used by...Ch. 6 - In an enzymatic reaction: a. the enzyme leaves the...Ch. 6 - Which of the following statements about the...Ch. 6 - Which of the following statements about inhibition...Ch. 6 - Which of the following statements is incorrect? a....Ch. 6 - Prob. 11TYKCh. 6 - Discuss Concepts Trace the flow of energy through...Ch. 6 - Prob. 13TYKCh. 6 - Prob. 14TYKCh. 6 - Prob. 15TYKCh. 6 - Prob. 16TYKCh. 6 - Prob. 17TYKCh. 6 - Prob. 1ITDCh. 6 - Prob. 2ITDCh. 6 - Prob. 3ITD
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- Which of the following statements supports the concept of the endosymbiotic theory? A. Proteins may be trafficked within the endomembrane system. B. Ribosomes are present in the cytoplasm of prokaryotic cells and eukaryotic cells. C. Chloroplasts have many features in common with bacteria. D. Mitochondria can fuse together to form larger organelles within eukaryotic cells.arrow_forwardIn addition to vitamin E succinate, which other fat-soluble vitamin has been shown to make lysosomal membranes more unstable and vulnerable to rupture (when consumed in large doses)? A. vitamin A (in the form of retinoic acid) B. vitamin B12 (in the form of cyanocobalamin) C. vitamin B2 (in the form of riboflavin) D. vitamin C (in the form of ascorbic acid) E. vitamin B1 (in the form of thiamine)arrow_forwardA certain molecule will not dissolve in water and has a structure consisting of glycerol covalently bound to three fatty acid tails. What is the function of this molecule? A:Genetic information storage B:Cell communication C:Catalysis of chemical reactions D:Energy storagearrow_forward
- Proteoglycans are: a. Consisted of 95% carbohydrate and 5% protein b. Proteins that are glycosylated c. Glycoproteins that expressed on the cell surface d. Proteins with O-glycosylation of all serine and threonine residuesarrow_forwardIn which of the following ways are bacterial cells similar to human cells? a. Bacterial cells have cell walls. b. Bacterial cells have a single, circular chromosome. c. Bacterial cells use ATP to fuel cellular activities. d. Bacterial cells lack mitochondria.arrow_forwardName an enzyme that acts on each molecule.(a) Lactose (b) Protein (c) RNAarrow_forward
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Endosymbiotic Theory; Author: Amoeba Sisters;https://www.youtube.com/watch?v=FGnS-Xk0ZqU;License: Standard Youtube License