Science test study by sammy

What is an Active Virus?

A type of virus that infects a cell, and it begins reproducing quickly.

What is a Hidden Virus?

Remains in the body without causing active symptoms. Then something triggers it, and it starts to multiply.

What is the main problem with Hidden Viruses

It can spread to other people without you knowing.

Are viruses living or nonliving

Non-living

How many cells does a virus have

none (acellular)

Structure of a Virus

DNA or RNA surrounded by a protein coat

Shape of the virus

icosahedral, helical, complex

How does a virus infect you

A virus infiltrates a cell by using the "keys" on its surface to unlock the "locks" on cells in your body. Once inside, it infiltrates the nucleus and makes copies of itself. The new viruses then exit the cell.

Why are viruses not considered living

Because viruses dont have Cells

How many cells do bacteria have

one (unicellular)

What does it mean that bacteria are prokaryotic

It means they are single-celled organisms that do not contain a nucleus

Are bacteria living or nonliving

living

How can bacteria reproduce

Asexual and Sexual

What is the problem with bacteria reproducing Asexually

If one bacteria is immune to some cure, it can spread it to other bacteria, making a lot of bacteria immune, and that cure will not work on you

Shapes of bacteria

Bacillus (rod-shaped), coccus (spherical-shaped), and spirillum (spiral-shaped).

What is the flagellum?

A flagellum is a tail-like structure that a cell uses to move.

How were antibiotics discoverered

The discovery of antibiotics began with Alexander Fleming's accidental observation of mold killing bacteria (penicillin), but later, other scientists isolated the exact chemical killing bacteria

Who discovered antibiotics

Alexander Flemming

What are vaccines?

Vaccines are weakened pathogens injected into your body so the immune system can have a memory that the virus is bad

Basic miscrosope rules

1. Always carry with two hands (base and arm)

2. Use the coarsest focus lens first

3. Carry the slide on the edges, useyour hand under the slide

What is an autotroph?

An organism that makes its own food

What is a heterotroph?

An organism that cannot make its own food.