Life Under the Microscope

What is the main structural difference between bacteria and viruses?

Bacteria have a cell wall; viruses do not.

Viruses have a cell membrane; bacteria do not.

Bacteria have a nucleus; viruses do not.

Viruses have cytoplasm; bacteria do not.

Which microorganism is known for its diverse roles, including nitrogen fixation and decomposition in soil?

Virus

Bacterium

Fungus

Protozoa

Which fungal microorganism is used in the production of bread and beer?

Candida

Penicillium

Saccharomyces

Aspergillus

What is the primary mode of transmission for the human immunodeficiency virus (HIV)?

Airborne transmission

Waterborne transmission

Sexual transmission

Vector-borne transmission

Which protozoan parasite causes malaria in humans?

Giardia lamblia

Plasmodium falciparum

Trypanosoma cruzi

Toxoplasma gondii