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Cells and viruses

Cells are basic unit of life organisms, whereas viruses are not cells.

QuestionAnswer
What is cell theory? Three principles of Cell Theory: 1) All organisms are made up of one or more cells. 2) Cell is the basic unit of life. 3) All cells come from other cells.
Five characteristics of the living organisms, can you name it? 1. All living organisms are made up of cells. 2. Cells perform metabolism. 3. All cells reproduce themselves. 4. All cells contain genetic information in the form of DNA. 5.All cells maintain steady balance "homeostasis".
What is unicellular? Is an organism that consists of a single cell. Example: bacteria
What is multicellular? Means a tissue, organ or organism that is made up of many cells. Examples: Animals Plants Fungi.
What are bacteria? Bacteria are prokaryotic cells and unicellular organisms.
What is a prokaryotic cell? Is a cell with no nucleus or other membrane - bound organelles. DNA is in the cytoplasm. An example are bacteria.
What is a eukaryotic cell Is a cell with nucleus and different membrane-bound organelles. DNA is the nucleus. Eukaryotic cells can be unicellular and multicellular. Examples: animal and plant cells.
What is a membrane-bound organelle? Are specialized structures with specific function inside the cell. Example: nucleus, mitochondria or endoplasmic reticulum.
In eukaryotic cells the DNA is located in...? Nucleus.
In prokaryotic cells the DNA is located in...? Cytoplasm.
What do animal and plant cells have in common? Both are eukaryotic cells, have nucleus and membrane-bound organelles.
Name three differences between animal and plant cells? Plants cells have cell wall, a large vacuole and chloroplasts; whereas animal cells do not.
Why viruses are not considered living things? Because viruses are not cells, need a host cell to replicate, do not metabolize nutrients and disrupt homeostasis.
What is homeostasis? Homeostasis is the steady balance of water, nutrients and energy in the cells.
What is a host cell? A host cell is a living cell that serves as a shelter and as energy source to the virus.
What is viral replication? Process to create new viruses.
Mention two types or viral replication. Lytic Cycle and Lysogenic Cycle
Genetic material in viruses is the form of....? The genetic material of viruses can be in the form of DNA or RNA.
What are the stages of viral replication in the Lytic Cycle? Attachment, penetration, replication or biosynthesis, assembly and release.
Where is genetic material found in a virus? The genetic material in a virus is in the capsid.
In the stage attachment of viral replication... The virus attaches to the host cell.
In the stage penetration of viral replication... The virus inserts its genetic material into the host cell.
In the stage biosynthesis of viral replication... The host cell replicates the virus.
In the stage assembly of viral replication... The new viruses are assemble inside of the host cell.
In the stage release of viral replication... The host cell’s membrane is broken apart and the viruses are released.
In the lytic cycle... New virus particles are QUICKLY produced and host cells begin to be damaged and destroyed causing symptoms to appear within just a few days of infection.
In the lysogenic cycle... The viral DNA remains DORMANT inside the host cell’s genome, and it is copied along with the cell’s DNA during cell division. Each new cell then contains a copy of the viral DNA.
Why lysogenic cycle is considered a long period infection? Because the viral DNA remains dormant in the host cell’s genome for a long period of time
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