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Ch.17 Nucleic Acids and Protein Synthesis
Timberlake - Chemistry: An Introduction to General, Organic, and Biological Chemistry 14th Edition
Timberlake14th EditionChemistry: An Introduction to General, Organic, and Biological ChemistryISBN: 9781292472249Non è quello che usi tu?Cambia libro di testo
Tutti i libri di testoTimberlake 14th EditionCh.17 Nucleic Acids and Protein SynthesisProblema 121
Capitolo 17, Problema 121

What is the difference between a DNA virus and a retrovirus?

Guida verificata passo dopo passo
1
Understand that both DNA viruses and retroviruses are types of viruses, but they differ in their genetic material and replication mechanisms.
DNA viruses contain DNA as their genetic material. When they infect a host cell, their DNA is directly used as a template for transcription to produce viral RNA and proteins.
Retroviruses, on the other hand, contain RNA as their genetic material. They use an enzyme called reverse transcriptase to convert their RNA into DNA after infecting a host cell.
The DNA produced by reverse transcriptase in retroviruses integrates into the host's genome, where it can be transcribed and translated to produce viral components.
Summarize the key difference: DNA viruses use DNA directly for replication, while retroviruses rely on reverse transcription to convert RNA into DNA before replication.

Concetti chiave

Ecco i concetti essenziali che devi comprendere per rispondere correttamente alla domanda.

DNA Virus

A DNA virus is a type of virus that has DNA as its genetic material. These viruses can be either double-stranded (dsDNA) or single-stranded (ssDNA). They replicate their DNA within the host cell's nucleus and often integrate into the host's genome, which can lead to persistent infections. Examples include the herpesvirus and the adenovirus.
Video consigliato:
Percorso guidato
5:08
Steps of DNA Replication Concept 1

Retrovirus

A retrovirus is a type of RNA virus that uses reverse transcription to convert its RNA genome into DNA after entering a host cell. This newly formed DNA is then integrated into the host's genome, allowing the virus to replicate as the host cell divides. Retroviruses are known for their role in diseases such as HIV/AIDS and certain types of cancer.

Replication Mechanism

The replication mechanism refers to the process by which viruses reproduce within host cells. DNA viruses typically replicate their DNA directly using the host's cellular machinery, while retroviruses first transcribe their RNA into DNA using reverse transcriptase. Understanding these mechanisms is crucial for developing antiviral therapies and vaccines.
Video consigliato:
Percorso guidato
1:40
Intro to DNA Replication Example 2
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Domanda del libro di testo

Match each of the following processes (1 to 5) with one of the items (a to e):

1. replication of DNA

a. DNA polymerase

b. mRNA is synthesized from nuclear DNA

c. viruses

d. restriction enzymes

e. tRNA molecules bond to codons

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Domanda del libro di testo

Match each of the following processes (1 to 5) with one of the items (a to e):

2. transcription

a. amino acids are linked together

b. RNA template is used to synthesize DNA

c. helicase unwinds DNA

d. genetic information is transferred from DNA

e. sticky ends join new DNA segment

601
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Domanda del libro di testo

Match each of the following processes (1 to 5) with one of the items (a to e):

1. replication of DNA

a. amino acids are linked together

b. RNA template is used to synthesize DNA

c. helicase unwinds DNA

d. genetic information is transferred from DNA

e. sticky ends join new DNA segment

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Domanda del libro di testo

 A polypeptide contains 36 amino acids. How many nucleotides would be found in the mRNA for this polypeptide?

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Domanda del libro di testo

Endorphins are polypeptides that reduce pain. What is the amino acid order for the endorphin leucine enkephalin (leu-enkephalin), which has the following mRNA?

AUG UAC GGU GGA UUU CUA UAA

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Domanda del libro di testo

Endorphins are polypeptides that reduce pain. What is the amino acid order for the endorphin methionine enkephalin (met-enkephalin), which has the following mRNA?

AUG UAC GGU GGA UUU AUG UAA

609
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