A species of bacteria can use sucrose as its sole source of carbon energy. The bacterial enzyme Q is used to hydrolyze sucrose into its constituent monosaccharides. In the absence of sucrose, there are fewer than 10 enzyme Q molecules in a bacterial cell. In the presence of sucrose there are more than several thousand enzyme molecules in a single cell. Enzyme Q does not exist as a zymogen. a. What are the constituent monosaccharides of sucrose? b. What is the specific type of enzyme regulation that controls enzyme Q ? c. Suggest a mechanism of how this type of enzyme regulation occurs.

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Chemistry for Today: General, Orga...

9th Edition
Spencer L. Seager + 2 others
Publisher: Cengage Learning
ISBN: 9781305960060
BuyFind

Chemistry for Today: General, Orga...

9th Edition
Spencer L. Seager + 2 others
Publisher: Cengage Learning
ISBN: 9781305960060

Solutions

Chapter 21, Problem 21.58E
Textbook Problem

A species of bacteria can use sucrose as its sole source of carbon energy. The bacterial enzyme Q is used to hydrolyze sucrose into its constituent monosaccharides. In the absence of sucrose, there are fewer than 10 enzyme Q molecules in a bacterial cell. In the presence of sucrose there are more than several thousand enzyme molecules in a single cell. Enzyme Q does not exist as a zymogen.

a. What are the constituent monosaccharides of sucrose?

b. What is the specific type of enzyme regulation that controls enzyme Q ?

c. Suggest a mechanism of how this type of enzyme regulation occurs.

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Chapter 21 Solutions

Chemistry for Today: General, Organic, and Biochemistry
Ch. 21 - Describe the role of hydrogen bonding in the...Ch. 21 - How many total hydrogen bonds would exist between...Ch. 21 - How many total hydrogen bonds would exist between...Ch. 21 - A strand of DNA has the base sequence ATGCATC....Ch. 21 - A strand of DNA has the base sequence GATTCA....Ch. 21 - What is a chromosome? How many chromosomes are in...Ch. 21 - What is meant by the term semiconservative...Ch. 21 - What is a replication fork?Ch. 21 - Describe the function of the enzyme halicase in...Ch. 21 - List the steps involved in DNA replication.Ch. 21 - What enzymes are involved in DNA replication?Ch. 21 - In what direction is a new DNA strand formed?Ch. 21 - Explain how the synthesis of a DNA daughter strand...Ch. 21 - The base sequence ACGTCT represents a portion of a...Ch. 21 - Explain the origin of Okazaki fragments.Ch. 21 - How does the sugar-phosphate backbone of RNA...Ch. 21 - Compare the secondary structures of RNA and DNA.Ch. 21 - Briefly describe the characteristics and functions...Ch. 21 - Must the ratio of guanine to cytosine be 1:1 in...Ch. 21 - What are the two important regions of a tRNA...Ch. 21 - What is the central dogma of molecular biology?Ch. 21 - In the flow of genetic information, what is meant...Ch. 21 - Briefly describe the synthesis of mRNA in the...Ch. 21 - Write the base sequence for the mRNA that would be...Ch. 21 - Describe the difference in the transcription and...Ch. 21 - What is the relationship among exons, introns, and...Ch. 21 - What is a codon?Ch. 21 - For each of the following mRNA codons, give the...Ch. 21 - Describe the experiment that allowed researchers...Ch. 21 - Which of the following statements about the...Ch. 21 - The -chain of hemoglobin is a protein that...Ch. 21 - What is a polysome?Ch. 21 - Beginning with DNA, describe in simple terms no...Ch. 21 - List the three major stages in protein synthesis.Ch. 21 - Does protein synthesis begin with the N- terminal...Ch. 21 - What is meant by the terms A site and P site?Ch. 21 - Beginning with DNA, describe specifically the...Ch. 21 - What is a genetic mutation?Ch. 21 - Briefly explain how genetic mutations can do the...Ch. 21 - What is the result of a genetic mutation that...Ch. 21 - Explain the function and importance of restriction...Ch. 21 - Explain how recombinant DNA differs from normal...Ch. 21 - Explain what plasmids are and how they are used to...Ch. 21 - List three substances likely to be produced on a...Ch. 21 - Explain how heating a double-stranded DNA fragment...Ch. 21 - Review Figure 21.5 and suggest a reaction that...Ch. 21 - A segment of DNA has an original code of ACA. This...Ch. 21 - A species of bacteria can use sucrose as its sole...Ch. 21 - During DNA replication, about 1000 nucleotides are...Ch. 21 - Genetic engineering shows great promise for the...Ch. 21 - Two samples of DNA are compared, and one has a...Ch. 21 - If DNA replication were not semiconservative, what...Ch. 21 - The genetic code contains three stop signals and...Ch. 21 - Azidothymidine AZT, a drug used to fight HIV, is...Ch. 21 - If DNA specifies only the primary structure of a...Ch. 21 - When were the first experiments carried out that...Ch. 21 - How does the DNA content determine what reactions...Ch. 21 - What would be the ramifications if DNA were single...Ch. 21 - Put the following terms in the correct order of...Ch. 21 - Which of the following are components of a...Ch. 21 - Explain the function and importance of each of the...Ch. 21 - The genes that encode for eukaryotic protein...Ch. 21 - Which base is found in DNA but not in RNA? a....Ch. 21 - Which of the following best describes tRNA? a. It...Ch. 21 - Which of the following is the site of protein...Ch. 21 - In messenger RNA, a codon contains how many...

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