Textbook Question
Besides the fact that it synthesizes RNA, how does RNA polymerase differ in function from DNA polymerase?
Ch. 7 - Microbial Genetics
Bauman6th EditionMicrobiology with Diseases by TaxonomyISBN: 9780134832302
Not the one you use?Change textbookSelect a different textbook
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 7
The addition of a ----CH3 to a cytosine nucleotide after DNA replication is called: .
a. Methylation
b. Restriction
c. Transcription
d. Transversion
Verified step by step guidance1
Understand the question: It asks for the name of the process where a specific chemical group is added to a cytosine nucleotide after DNA replication.
Recall that the addition of a methyl group (–CH3) to cytosine bases in DNA is a common epigenetic modification.
This process is known as methylation, which typically occurs at cytosine residues in CpG dinucleotides and can affect gene expression without changing the DNA sequence.
Review the other options: restriction refers to cutting DNA by restriction enzymes, transcription is the synthesis of RNA from DNA, and transversion is a type of point mutation where a purine is replaced by a pyrimidine or vice versa.
Conclude that the correct term for adding a chemical group to cytosine after DNA replication is methylation.
Verified video answer for a similar problem:
This video solution was recommended by our tutors as helpful for the problem above.
Video duration:
1mWas this helpful?
Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
DNA Methylation
DNA methylation is the addition of a methyl group (–CH3) to a cytosine nucleotide, typically at CpG sites, after DNA replication. This epigenetic modification can regulate gene expression without changing the DNA sequence and plays a role in processes like gene silencing and genomic imprinting.
Recommended video:
Guided course
03:39
DNA Methylation
Restriction
Restriction refers to the cutting of DNA at specific sequences by restriction enzymes (restriction endonucleases). It is a natural bacterial defense mechanism against viruses and is widely used in molecular biology for DNA manipulation, but it does not involve modification of cytosine nucleotides.
Recommended video:
Guided course
03:271a) Use Restriction Enzymes
Transversion Mutation
A transversion is a type of point mutation where a purine base is replaced by a pyrimidine base or vice versa (e.g., cytosine replaced by adenine). It changes the DNA sequence but is unrelated to chemical modifications like methylation.
Recommended video:
Guided course
08:44Types of Mutations
Related Practice
Textbook Question
A gene for antibiotic resistance can move horizontally among bacterial cells by __________ , __________ , and __________ .
1
views
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
1
views
Textbook Question
Describe the formation and function of mRNA, rRNA, and tRNA in prokaryotes and eukaryotes.
2
views
Textbook Question
Compare and contrast the structure and components of DNA and RNA in prokaryotes.
3
views