7th - Unit 6 Bacteria and Viruses Test

What is the function of ribosomes in bacteria?

• Produce cell membrane

• Produce plasmids

• Produce proteins

• Produce DNA

What is the process of bacterial reproduction called?

• Binary fission

• Conjugation

• Meiosis

• Mitosis

Tags

NGSS.MS-LS3-2

What is an endospore?

• A type of bacteria

• A type of virus

• A tough case enclosing bacterium's DNA and ribosomes

• A type of cell membrane

What is the structure of a virus?

• Has many type of cells

• Has a protein coat surrounding nucleic acid

• Has a cell membrane

• Has cytosol and organelles

What happens when a virus becomes active?

• It destroys the cell by bursting it open

• It attaches to the host skin

• It remains latent for a period of months or years

• It injects its nucleic acid into the cytoplasm

What is a good practice to fight viral infections?

• Becoming vaccinated against viral diseases

• Not exercising regularly

• Not covering coughs and sneezes

• Eating a fatty diet

Why do scientists use a different system to classify viruses?

• Because viruses are similar to bacteria

• Because viruses are not alive

• Because viruses reproduce through binary fission

• Because viruses have a cell membrane

When would a bacterium likely form an endospore?

• When the conditions are ideal for a bacterium to survive

• When the conditions make it difficult for a bacterium to survive

• When the bacterium is inactive

• When the bacterium is reproducing

Tags

NGSS.MS-LS2-1

What is the main function of bacteria in the environment?

• To infect plants and animals

• To destroy other bacteria

• To recycle matter back into the soil

• To cause diseases

Tags

NGSS.MS-LS2-3

What is the main function of viruses in the environment?

• To use other cells to reproduce

• To enable plants to use nitrogen

• To recycle matter back into the soil

• To help in digestion of cellulose