Bacteria, Viruses, & Immune System

Bacteria reproduce by

• Using a host cell

• Mitosis

• Binary Fission

• Bacteria can not reproduce

Tags

NGSS.MS-LS3-2

Bacteria can be classified by their:

• DNA & Flagella

• Cell Wall & Shape

• Shape & Capsule

• Capsule & Cell Wall

During a gram-stain test- a bacteria dyes purple. This means:

• It is gram-positive & has a thick cell wall

• It is gram-negative & has a thick cell wall

• It is gram-positive & has a thin cell wall

• It is gram-negative & has a thin cell wall

What shape does this bacteria have?

• Bacilli

• Spirilla

• Rod-Shape

• Cocci

Bacteria cause disease in all of the following ways except

• releasing toxins

• damaging host tissue

• destroying cells

• inserting DNA into a host cell

Your doctor prescribes you an antibiotic- you most likely have which of the following:

• A common cold (viral infection)

• Strep (a bacterial infection)

• Chicken Pox (a viral infection)

• Norovirus (a viral infection)

Who created the "Germ Theory of Disease"?

• Watson & Crick

• Pasteur

• The CDC

• Mendel

A virus injects DNA into the cell & the cell begins to immediately make viral proteins. This is an example of the_____ life-cycle

• Bacterial

• Lytic

• lysogenic

• retroviral

What is one way that a lysogenic infection differs from a lytic infection?

• A lysogenic virus does not act on bacteria as a lytic virus does.

• A lysogenic virus can remain in the host DNA for a longer period without becoming active.

• A lysogenic virus contains RNA instead of DNA.

• A lysogenic virus directs the production of new viruses right away

Which statement is true about viruses?

• Viruses can eat and metabolize food.

• Viruses can reproduce only using a host cell.

• Viruses can reproduce on their own at any time.

• Viruses contain DNA, so they are alive.