Domanda del libro di testo
Which of the following molecules functions as a “proofreader” for a newly replicated strand of DNA?
a. DNA polymerase III
b. Primase
c. Helicase
d. Ligase
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Ch. 7 - Microbial Genetics
Bauman6th EditionMicrobiology with Diseases by TaxonomyISBN: 9780134832302
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TOC.tableOfContents
- Ch. 1 - A Brief History of Microbiology31
- Ch. 2 - The Chemistry of Microbiology28
- Ch. 3 - Cell Structure and Function39
- Ch. 4 - Microscopy, Staining, and Classification25
- Ch. 5 - Microbial Metabolism51
- Ch. 6 - Microbial Nutrition and Growth37
- Ch. 7 - Microbial Genetics51
- Ch. 8 - Recombinant DNA Technology21
- Ch. 9 - Controlling Microbial Growth in the Environment36
- Ch. 10 - Controlling Microbial Growth in the Body: Antimicrobial Drugs21
- Ch. 11 - Characterizing and Classifying Prokaryotes29
- Ch. 12 - Characterizing and Classifying Eukaryotes34
- Ch. 13 - Characterizing and Classifying Viruses, Viroids, and Prions23
- Ch. 14 - Infection, Infectious Diseases, and Epidemiology35
- Ch. 15 - Innate Immunity34
- Ch. 16 - Adaptive Immunity21
- Ch. 17 - Immunization and Immune Testing29
- Ch. 18 - Immune Disorders22
- Ch. 19 - Pathogenic Gram-Positive Bacteria25
- Ch. 20 - Pathogenic Gram-Negative Cocci and Bacilli28
- Ch. 21 - Rickettsias, Chlamydias, Spirochetes, and Vibrios25
- Ch. 22 - Pathogenic Fungi47
- Ch. 23 - Parasitic Protozoa, Helminths, and Arthropod Vectors44
- Ch. 24 - Pathogenic DNA Viruses23
- Ch. 25 - Pathogenic RNA Viruses30
- Ch. 26 - Applied and Industrial Microbiology29
- Ch. 27 - Microbial Ecology and Microbiomes22
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Capitolo 7, Problema 5
An operon consists of __________ , ___________ , and __________ , and is associated with a regulatory gene.
Guida verificata passo dopo passo1
Understand that an operon is a functioning unit of genomic DNA containing a cluster of genes under the control of a single promoter, allowing coordinated expression.
Identify the three main components of an operon: the promoter, the operator, and the structural genes.
The promoter is the DNA sequence where RNA polymerase binds to initiate transcription.
The operator is a regulatory sequence where a repressor protein can bind to block transcription.
The structural genes are the genes that code for proteins or enzymes needed for a specific metabolic pathway or function.
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Structural Genes
Structural genes are the segments of DNA within an operon that code for proteins or enzymes. These genes are transcribed together into a single mRNA molecule, allowing coordinated expression of proteins involved in a common pathway or function.
Video consigliato:
04:42
Horizontal Gene Transfer
Promoter
The promoter is a DNA sequence located upstream of the structural genes where RNA polymerase binds to initiate transcription. It plays a crucial role in regulating gene expression by controlling the start of mRNA synthesis.
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05:48Microbiome Promotes Immune Tolerance
Operator
The operator is a regulatory DNA segment situated between the promoter and structural genes. It acts as a binding site for repressor proteins, which can block RNA polymerase access and thus control the transcription of the operon.
Video consigliato:
04:23Structure of an Operon
Pratica correlata
Domanda del libro di testo
Nucleotides used in the replication of DNA __________ .
a. Carry energy
b. Are found in four forms, each with a deoxyribose sugar, a phosphate, and a base
c. Are present in cells as triphosphate nucleotides
d. All of the above are correct.
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Domanda del libro di testo
Polypeptide synthesis requires large amounts of energy. How do cells regulate synthesis to conserve energy? Describe one specific example.
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Domanda del libro di testo
In general, __________ operons are inactive until the substrate of their genes’ polypeptides is present.
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Domanda del libro di testo
Compare and contrast the structure and components of DNA and RNA in prokaryotes.
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Domanda del libro di testo
Describe the operon model of gene regulation.
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