Biology, 18.12.2020 04:40 username999990

What structure is found in viruses but not in cells?

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Answer from: silly82

Some viruses have genetic material in for of RNA instead of DNA, such thing can be seen in HIV. Viruses have protein coats covered in small molecular receptors/ surface markers.
Viruses like the Bacteriophage have a capsid protein head/shell in which the DNA is held within, a collar and a sheath below it, at the bottom it has a base plate. I can send a picture of a drawing of it to help clarify its structure. Please remember the most important takeaway from this *Viruses are NOT cells nor are they made out of cells* therefore they will not have any molecules that cells naturally already have inside of them except for the genome(DNA or RNA)
also some viruses have envelope/cell membrane. Viral envelopes are pieces of membranes that are taken directly from the host cell/your own cell that made the new virus through. Since Viruses cannot go through mitosis like regular eukaryotic somatic cells(our human cells) do then they have to reproduce by attaching to our host cell, infesting it and then going through either one viral reproduction cycles; Lytic (short cycle)and Lysogenic( long cycle)

If youd like to know more of any of this or have any other questions or want me to include my drawn structure of viruses please dont hesitate to contact me, thank you.
What structure is found in viruses but not in cells?

What structure is found in viruses but not in cells?

Answer from: Quest

a fossil fuel is a fuel formed by natural processes, such as anaerobic decomposition of buried dead organisms, containing energy originating in ancient photosynthesis.[1] the age of the organisms and their resulting fossil fuels is typically millions of years, and sometimes exceeds 650 million years.[2] fossil fuels contain high percentages of carbon and include petroleum, coal, and natural gas.[3] other commonly used derivatives include kerosene and propane. fossil fuels range from volatile materials with low carbon to hydrogen ratios like methane, to liquids like petroleum, to nonvolatile materials composed of almost pure carbon, like anthracite coal. methane can be found in hydrocarbon fields either alone, associated with oil, or in the form of methane clathrates.

the theory that fossil fuels formed from the fossilized remains of dead plants by exposure to heat and pressure in the earth's crust over millions of years was first introduced by andreas libavius "in his 1597 alchemia [alchymia]" and later by mikhail lomonosov "as early as 1757 and certainly by 1763".[4] the first use of the term "fossil fuel" was by the german chemist caspar neumann, in english translation in 1759.[5]

in 2017 the world's primary energy sources consisted of petroleum (34%), coal (28%), natural gas (23%), amounting to an 85% share for fossil fuels in primary energy consumption in the world.[6] non-fossil sources in 2006 included nuclear (8.5%), hydroelectric (6.3%), and others (geothermal, solar, tidal, wind, wood, waste) amounting to 0.9%.[7] world energy consumption was growing at about 2.3% per year. in 2015 about 18% of worldwide consumption was from renewable sources.[8]

Answer from: Quest

a. seed plant structure. 1. the three main plant organs are roots, stems, and leaves. a fourth kind of tissue, meristematic tissue, is responsible for plant growth. meristematic tissue is the only plant tissue that produces new cells by mitosis. plants can lose water out of their leaves as they exchange gases with the air

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