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VikaD [51]
3 years ago
9

Viruses, although not considered to be alive, attack host cells and cause disease. The attack of a host cell is necessary for th

e virus to survive for all of the reasons listed EXCEPT one. That is
A) they cannot synthesize proteins because they lack ribosomes and must use the ribosomes of their host cells to translate viral messenger RNA into new proteins.
B) they cannot produce or store energy in the form of ATP and have to get their energy from the host cell.
C) they parasitize the host cell for basic molecules like amino acids, nucleotides, and lipids.
D) they lack DNA so they must use the DNA of the host cell
Biology
2 answers:
abruzzese [7]3 years ago
7 0
<span>D) they lack DNA so they must use the DNA of the host cell

Viruses do in fact have their own DNA.</span>
lakkis [162]3 years ago
7 0

Answer:

D) they lack DNA so they must use the DNA of the host cell

Explanation:

All but they lack DNA/RNA so they must use the DNA of the host cell. Viruses do contain DNA or RNA, which they inject into the host cells. Viral RNA is used to produce viral proteins from the organelles and molecules in the host cell.

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<u>Protozoans</u>:

Microscopic unicellular organisms, eukaryotic and heterotrophs -predators or detritivores-. Most of them are aquatic free-living organisms, but some species are parasites. They feed on<u> bacteria</u>, other organic wastes, and other microscopic organisms. The phagocytosis process is normally used to ingest the food, invaginating their cell membrane.  

<u>Algae</u>:

Eukaryotic micro- or macroscopic organisms. Autotroph and photosynthetic. They might be either unicellular or pluricellular. They use sunlight to synthesize organic matter from water, CO₂, and mineral salts. Unicellular ones can be free-living or associate with others to form colonies. They are part of the phytoplankton and are ingested by heterotrophic organisms. Pluricellular algae do not create real tissues but they compose a tale. The depth at which they inhabit depends on the pigments they produce. All of them inhabit fresh or sea waters.

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