Question

 

A microorganism is infectious if:

A

it can reproduce within the human body

B

it can spread directly from person to person

C

it can make you sick

D

a microorganism must have all of these characteristics to be considered infectious

 

True or false: all infectious agents are disease-causing.

A

True

B

False

 

What property allows influenza virus strains to evolve rapidly? Choose the BEST answer.

A

Their simplicity

B

Their size

C

Their genetic diversity

D

Their low mutation rate

 

What is true of the SARS-COV2 (COVID-19) coronavirus?

A

it has a higher mutation rate than influenza virus (the flu)

B

 

 

Answer 1

Question 1) option D , a micro organism must have a the characteristic

Micro organism must be infectious, must be stored from one person to other person and can make the person sick. Than it will be infectious.

Question 2) B , false

All infectious agents are not disease causing

Question 3) What property allows influenza virus strains to evolve rapidly?

Option c, genetic diversity.

Virus has RNA genome , mutation rate is higher in RNA than DNA which lead to wide genetic variability. And they evolve rapidally. And form new strain in a short period of time.

Question 4) Which of the following statements about viruses are true?

Option B is correct.

It can replicate in the host. Can not replicate outside the host .

Antibiotics work against bacteria not work against virus .