86. A newly discovered infectious agent is found to have genetic material with the following base composition: 23% Adenine Cytosine Guanine 26% 24% Thymine 27% The infectious agent is most likely which of the following? A) Double-stranded DNA virus B) Double-stranded RNA virus C) Prion D) Single-stranded DNA virus E) Single-stranded RNA virus

Q: 26. In some cases involving bacteriophages, the viral DNA will insert itself into the bacterial DNA.…

A: A bacteriophage is a bacteria-infecting virus. A bacteriophage is a virus that is made up of DNA or…

Q: Which of the following highly contagious viruses is a single-stranded ribonucleic acid (RNA) virus…

A: Respiratory Illness: Respiratory illness refers to a group of disorders that affect the lungs and…

Q: As a general rule, viruses are not considered to be alive based on several reasons. One such reason…

A: Viruses are small, microscopic organisms that contain either RNA or DNA as their genetic material.…

Q: 40) The molecular forces that hold the proteins of a capsule together are covalent bonds. True or…

A: The topics covered include chromosomal dynamics in the cell cycle, the historical background of gene…

Q: 1) Which of the following are referred to as retrotransposons? a) VNTRS b) SINES c) LINES d) STRS 2)…

A: As per our honor code, we are authorized to answer only one question at a moment. So, we are…

Q: The Shingles virus causes infections in adult patients years after they have experienced chicken pox…

A: Virus is a microscopic organism which contains a protective coat and the nucleic acid. It doesn’t…

Q: Which of the following is true about plasmids?a) They are present in all organismsb) They are…

A: A plasmid is circular, extrachromosomal, small piece of DNA present in the cytoplasm that is…

Q: A cytosine is deaminated, forming uracil. Which DNA repair systems is best able to correct this…

A: The objective of the question is to identify the DNA repair system that is best suited to correct…

Q: D) polyhedral The first step in viral infection is the recognition between the virus and the host…

A: The virus is a microscopic organism that infects other cells to survive. The virus can only…

Q: The technique of DNA sequencing involves performing _______________ . A) northern blotting B)…

A: DNA sequence can be determined by performing DNA sequencing method in vitro.

Q: What is meant by the term emerging virus?

A: Viruses are microscopic agents that can replicate only inside the host cells. They can infect all…

Q: Bacteria contains - 1) double stranded RNA 2) single linear DNA 3) no RNA 4) single circular DNA

A: Genome is defined as an organism's whole set of genetic data. It has all of the data required to…

Q: 27. Match the following three words to its correct definition.  a.) Transformation b.) Transduction…

A: The horizontal gene transfer is the process of transfer of DNA from one organisms to another without…

Q: Which of the following self-replicating biological agents carries only one polynucleotide chain as…

A: Viruses are the microscopic organisms that cause infectious diseases to the living organisms. They…

Q: How many millions of bases are in the genome of the mimivirus or largest virus known?

A: In the family Mimiviridae, the genus Mimivirus contains enormous viruses. Their native hosts are…

Q: In the process of transformation 1) cells take up DNA from their environment 2) DNA is transferred…

A: In transformation, the competent cells are made in which the cells are treated with chemicals or…

Q: A viral protein has a 20 amino acid amino acid chain consisting of the following primary structure:…

A: Amino acids are the building units of a protein. In viruses, protein is present in the capsid,…

Q: 1) Antibiotics that inhibit the formation of the peptidoglycan layer in bacteria work through…

A: The bacterial cell wall is a rigid, protective layer that surrounds the bacterial cell membrane and…

Q: Assume you isolate a single stranded (+) RNA virus. When you examine the proteins in the virus, you…

A: RNA-dependent RNA polymerase  or RNA polymerase or replicase  is an enzyme that catalyzes the…

Q: A viral particle adsorbs onto a host cell membrane. It uncoats and releases its single-stranded…

A: Viruses are differing entities that can be classified based on their nucleic acid type, replication…

Q: 3) What is the most successful treatment during pregnancy to reduce transmission of HIV from mother…

A: HIV (human immunodeficiency virus) is a virus that attacks cells in the body that help it battle…

Q: 27. Class VI animal viruses include HIV. Based on the type of viral genome, how is this class…

A: Group 6 animal viruses are single-stranded so option A is wrong.

Q: Which of the following is NOT a feature of genetic reassortment? A)  a host cell is coinfected with…

A: Genetic reassortment is the changes in the genome of the virus that affect the host. This helps in…

Q: What would happen to a virus that found its way to an environment filled only with cells that were…

A: Virus  Viruses are the sub microscopic infectious organisms.

Q: Which of the following statements is not applicable to conjugation? A) OF factors are transferrable…

A: Bacteria are single-celled microbes. These organisms are capable of exchanging inheritable material…

Q: a. Which type of viruses can be directly used for translation?     a)  dsRNA   b)  Positive…

A: RNA also known as Ribonucleic acid. It present in all living cell. RNA is mostly single stranded.…

Q: Which of the following statements is true for a retrovirus? a) It contains both RNA and DNA. b) It…

A: Introduction  Viruses are small infectious agents that can replicate only inside the living cells of…

Q: 28. Class VI animal viruses include the retroviruses such as HIV. What type of enzyme does HIV…

A: The correct option is A) Reverse transcriptase. When the HIV has gained entry, the introduction of…

Q: The relative amounts of each nitrogenous base are tabulated here for four different viruses. For…

A: Viruses are microscopic agents that can replicate only inside host cells. They can infect all types…

Q: Common vectors used to transfer a piece of DNA into a cloning host are ________. A) artificial…

A: The question given is to identify common vectors used to transfer a piece of a DNA into a cloning…

Q: Which of the following statements concerning the infection of human cells by the HIV virus is false?…

A: a) After entry to the cell, the virus coat is removed and then the viral DNA is re;ease into the…

Q: The second step in viral replication is entry. For bacteriophage, entry usually involves: O a)…

A: A virus is an obligate parasite which have small piece of genetic material. This genetic material…

Viral Infections

Viruses are abundantly found, minute entities that have genetic material enclosed within a protein coat. The proteinaceous material enclosing the genetic material of the virus is called a capsid. The genetic material could be either DNA (deoxyribonucleic acid) or RNA (ribonucleic acid). A virus is too minute to be looked at with naked eyes and therefore visualized with the help of a microscope. They are acellular entities that require a host for processes, such as replication, transcription, translation and multiplication. Plants, animals, and bacteria act as host wherein the virus reproduce. Viruses cannot multiply outside the host's body and thus are considered nonliving outside the host body.