Textbook Question
The addition of a ----CH3 to a cytosine nucleotide after DNA replication is called: .
a. Methylation
b. Restriction
c. Transcription
d. Transversion
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Ch. 7 - Microbial Genetics
Bauman6th EditionMicrobiology with Diseases by TaxonomyISBN: 9780134832302
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Table of contents
- 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
Bauman6th EditionMicrobiology with Diseases by TaxonomyISBN: 9780134832302Not the one you use?Change textbook
Chapter 7, Problem 8
Describe the formation and function of mRNA, rRNA, and tRNA in prokaryotes and eukaryotes.
Verified step by step guidance1
Start by defining each type of RNA: mRNA (messenger RNA), rRNA (ribosomal RNA), and tRNA (transfer RNA), highlighting their roles in protein synthesis.
Explain the formation of mRNA in both prokaryotes and eukaryotes, focusing on transcription from DNA, noting that in prokaryotes mRNA is often polycistronic and in eukaryotes it undergoes processing such as 5' capping, splicing, and 3' polyadenylation.
Describe the synthesis of rRNA, emphasizing that it is transcribed from rDNA genes in the nucleolus in eukaryotes and in the nucleoid region in prokaryotes, and explain its role as a structural and catalytic component of ribosomes.
Outline the formation of tRNA, including transcription from tRNA genes, and mention the post-transcriptional modifications that occur, as well as its function in delivering specific amino acids to the ribosome during translation.
Summarize the functional differences and similarities of these RNAs in prokaryotes and eukaryotes, emphasizing how they collaborate to ensure accurate and efficient protein synthesis.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Types of RNA: mRNA, rRNA, and tRNA
mRNA (messenger RNA) carries genetic information from DNA to ribosomes for protein synthesis. rRNA (ribosomal RNA) forms the core of ribosome structure and catalyzes protein assembly. tRNA (transfer RNA) transports specific amino acids to the ribosome during translation, matching codons on mRNA with the correct amino acid.
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07:20
Introduction to Types of RNA
RNA Formation (Transcription) in Prokaryotes and Eukaryotes
Transcription is the process of synthesizing RNA from a DNA template. In prokaryotes, transcription occurs in the cytoplasm and produces mRNA that is often polycistronic. In eukaryotes, transcription occurs in the nucleus, producing pre-mRNA that undergoes processing like splicing, 5' capping, and polyadenylation before becoming mature mRNA.
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04:17Transcription Termination in Prokaryotes
Function and Processing Differences Between Prokaryotic and Eukaryotic RNA
In prokaryotes, mRNA is typically short-lived and directly translated, while eukaryotic mRNA is processed and transported out of the nucleus. rRNA and tRNA are transcribed by different RNA polymerases in eukaryotes and undergo extensive modification. These differences affect how RNA functions in protein synthesis across the two domains.
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02:32Eukaryotic RNA Processing and Splicing
Related Practice
Textbook Question
Besides the fact that it synthesizes RNA, how does RNA polymerase differ in function from DNA polymerase?
Textbook Question
A gene for antibiotic resistance can move horizontally among bacterial cells by __________ , __________ , and __________ .
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Textbook Question
A daughter DNA molecule is composed of one original strand and one new strand because DNA replication is __________ .
Textbook Question
In translation, the site through which tRNA molecules leave a ribosome is called the:
a. A site
b. X site
c. P site
d. E site
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Textbook Question
Describe how DNA is packaged in both prokaryotes and eukaryotes.
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