Microbiology worksheet with answers

Which of these is a protozoan?

1. ACandida albicans
2. BRotavirus
3. CGiardia lamblia
4. DEscherichia coli

Which of these is usually the smallest?

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

The HPV vaccine mainly protects against:

1. AHerpes simplex infection
2. BHIV infection
3. CHepatitis B and liver cancer
4. DCervical and other cancers caused by human papillomavirus

Which antibody class is the first to rise in a new infection?

1. AIgG
2. BIgE
3. CIgA
4. DIgM

Why are Gram-negative bacteria often harder to treat with antibiotics?

1. AThey have a thicker peptidoglycan layer
2. BTheir outer membrane blocks many drugs
3. CThey have no ribosomes
4. DThey divide much more slowly

How does an mRNA vaccine produce immunity?

1. AThe mRNA contains weakened live virus
2. BThe mRNA kills the virus directly in the blood
3. CThe mRNA is inserted permanently into human DNA
4. DBody cells use the mRNA to make a viral protein that the immune system learns to recognise

A patient taking high-dose immunosuppressive drugs after a transplant is due for vaccinations. Which vaccine type is generally avoided?

1. AInactivated whole-virus vaccines
2. BSubunit vaccines
3. CToxoid vaccines
4. DLive attenuated vaccines

Several people vomit within a few hours of eating fried rice that was cooked the day before and kept at room temperature. Which organism is the classic cause?

1. ABacillus cereus
2. BSalmonella Typhi
3. CListeria monocytogenes
4. DClostridium botulinum