Outside a cell, viruses are ? running a small number of biochemical reactions. synthesizing proteins necessary for entry into the host. ? inert, and not capable of replication. constructing a cell membrane known as an envelope.
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Which of the following would NOT be included in the biosynthesis of a typical animal virus? replication of viral nucleic acid inside host cells synthesis of viral capsid proteins within host cell ribosomes synthesis of needed enzymes by host cells assembling of capsid proteins to form an envelop
Madhur L.
Viruses are made up of the same biomolecules as cellular organisms (DNA, RNA, proteins, lipids, etc.), which are synthesized through enzymatic dehydration reactions from building blocks and disassembled by enzymatic hydrolysis. They infect cells and replicate themselves using resources from the host cells. Scientists discovered a previously unknown strain of virus in the tropical Pacific Ocean and it can infect higher-order eukaryotes. Initial analysis revealed that the virus is mainly composed of nucleic acids, proteins, and lipids. Chemical analysis after complete hydrolysis revealed the following building blocks (by weight): Chemical components Nucleosides Amino acids Lipids, phosphates, and carbohydrates Percentage by weight 20 30 50 Analysis of percentages of nucleosides yielded the following results (by molar ratio): Nucleosides A G T C U Percentage by mole 19 29 19 29 4 Which of the following events mostly involves hydrolysis reaction after the virus infects a eukaryotic cell? The virus degrades host RNA. The virus synthesizes its own protein. The virus assembles new particles of progeny. The virus replicates its genetic material (DNA or RNA).
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