Microbiology worksheet with answers

Which of these is a protozoan?

1. AGiardia lamblia
2. BRotavirus
3. CEscherichia coli
4. DCandida albicans

The HPV vaccine mainly protects against:

1. AHepatitis B and liver cancer
2. BCervical and other cancers caused by human papillomavirus
3. CHIV infection
4. DHerpes simplex infection

Which of these is usually the smallest?

1. AA yeast cell
2. BA red blood cell
3. CA bacterium
4. DA virus

In the lysogenic cycle of a bacteriophage, what happens to the phage DNA?

1. AIt leaves the cell through the pilus
2. BIt is integrated into the bacterial chromosome as a prophage
3. CIt is immediately used to make new phages that burst the cell
4. DIt is destroyed by the bacterium

Tetanus and diphtheria vaccines are toxoids. What does that mean?

1. AThey contain ready-made antibodies against the toxin, giving passive immunity
2. BThey contain live bacteria that cannot make toxin
3. CThey contain the bacterial DNA only
4. DThey contain an inactivated toxin that still triggers an immune response

How is DNA transferred between bacteria during conjugation?

1. ABy fusion of two bacterial cells into one
2. BBy uptake of free DNA from the environment
3. CThrough direct contact using a sex pilus
4. DBy a bacteriophage carrying bacterial DNA

Primary syphilis typically presents with:

1. ADamage to the heart and brain
2. BA painless ulcer (chancre) at the site of infection
3. CA painful cluster of small blisters on the genitals or the mouth
4. DA widespread rash on the palms and soles

An older adult develops a painful blistering rash in a band on one side of the chest. What explains this pattern?

1. AAn allergic reaction to clothing affects one dermatome
2. BA new chickenpox infection spreads through the blood to one side
3. CBacteria spread along the lymphatic vessels of the chest
4. DVaricella-zoster virus reactivates from one sensory ganglion and travels along its nerve