- What is viral structure?
- Which stage of virus occurs first?
- How do virus reproduce?
- What is the meaning of Ultramicroscopic?
- What is the correct sequence of events in viral reproduction?
- What is the correct sequence of events for the replication of a DNA virus quizlet?
- What are the 5 steps of the viral life cycle?
- What are the steps involved in viral replication quizlet?
- Which body system is mainly affected by Creutzfeldt Jakob disease?
- Are viruses Ultramicroscopic?
- Why are viruses obligate parasites?
What is viral structure?
Viruses vary in their structure.
A virus particle consists of DNA or RNA within a protective protein coat called a capsid.
The shape of the capsid may vary from one type of virus to another.
The capsid is made from the proteins that are encoded by viral genes within their genome..
Which stage of virus occurs first?
The first stage in the viral replication cycle is expression of the viral early genes. Transcription of these genes occurs using cellular RNA polymerase II and cellular transcription factors. These proteins bind to the viral DNA in regions called early promoters/enhancers, and promote synthesis of the early pre-mRNAs.
How do virus reproduce?
A virus is a tiny, infectious particle that can reproduce only by infecting a host cell. Viruses “commandeer” the host cell and use its resources to make more viruses, basically reprogramming it to become a virus factory. Because they can’t reproduce by themselves (without a host), viruses are not considered living.
What is the meaning of Ultramicroscopic?
1 : too small to be seen with an ordinary microscope. 2 : of or relating to an ultramicroscope.
What is the correct sequence of events in viral reproduction?
Viral replication involves six steps: attachment, penetration, uncoating, replication, assembly, and release. During attachment and penetration, the virus attaches itself to a host cell and injects its genetic material into it.
What is the correct sequence of events for the replication of a DNA virus quizlet?
Viral replication or multiplication is often presented as including the following steps: attachment, entry and uncoating, biosynthesis, maturation, and release. This activity asks you to match the description of each event with the appropriate location in the image depicting the overall replication process.
What are the 5 steps of the viral life cycle?
The life cycle of virus. The virus life cycle could be divided into six steps: attachment, penetration, uncoating, gene expression and replication, assembly, and release.
What are the steps involved in viral replication quizlet?
Terms in this set (7)Attachment or Absorption. Viral particle attaches to host cell via specific receptors on on the surface of the host cell. … Penetration. Entry of viral nucleic acid into host cell. … Uncoating. separation of nucleic acid from the protein capsid coat. … Integration. … Synthesis. … Maturation or Assembly. … Release.
Which body system is mainly affected by Creutzfeldt Jakob disease?
The pattern of symptoms can vary depending on the type of Creutzfeldt-Jakob disease (CJD). In sporadic CJD, the symptoms mainly affect the workings of the nervous system (neurological symptoms) and these symptoms rapidly worsen in the space of a few months.
Are viruses Ultramicroscopic?
Viruses are generally ultramicroscopic, typically from 20 nm to 900 nm in length. … Viruses are obligate intracellular parasites. Viruses are known to infect various types of cells found in plants, animals, fungi, protists, bacteria, and archaea.
Why are viruses obligate parasites?
viruses. All viruses are obligate parasites; that is, they lack metabolic machinery of their own to generate energy or to synthesize proteins, so they depend on host cells to carry out these vital functions.