Bacteria and virus

Place the steps of binary fission in order

• One bacterium

• DNA replicates

• Cell membrane pinches in two

• Two bacteria

Tags

NGSS.MS-LS3-2

Archaea lack a certain___________________ in their cell walls

What is one way to help avoid getting a viral disease?

• Washing hands

• Getting vaccinated

• Avoiding people

• Coughing into your elbow

Answer explanation

To help avoid getting a viral disease, one can wash hands and get vaccinated, as these measures can reduce the risk of infection.

Archaea have genes that are more similar to

• Eukaryotes than to those of bacteria

• Prokaryotes

• bacteria

• human genes

Answer explanation

Archaea have genes that are more similar to Eukaryotes than to those of bacteria, indicating a closer evolutionary relationship with Eukaryotes.

Tags

NGSS.HS-LS4-2

Why do scientists use a different system to classify viruses?

• Many scientists do not believe that viruses are alive

• Many scientists believe that viruses are living

• Many scientists do not believe viruses are real

Answer explanation

Many scientists do not believe that viruses are alive

Some bacteria have a small circular strand of DNA separate from their main chromosome called a ______________________

What is the purpose of a bacterium's flagellum?

• to help it move

• to swish in the wind

• to look pretty

• to make the bacterium camouflage

Answer explanation

The purpose of a bacterium's flagellum is to help it move.

Tags

NGSS.MS-LS1-2

Two groups of prokaryotes are ​ (a)   ​ and ​ (b)  

• bacteria

• archaea

• flagellum

• endospore

Answer explanation

The two groups of prokaryotes are bacteria and archaea, as mentioned in the question. Bacteria and archaea are the correct choices.

What do bacteria have instead of a nucleus?

• chloroplast

• mitochondria

• cell wall

• nucleic acid

Answer explanation

Bacteria have nucleic acid instead of a nucleus, which contains their genetic material. Nucleic acid is responsible for controlling the cell's activities.

What is the protective protein coat of a virus?

• envelope

• membrane

• capsid

• nucleus

Answer explanation

The protective protein coat of a virus is called the capsid, which surrounds the genetic material of the virus. It helps protect the virus and aids in its attachment to host cells.