Dairy Microbiology Quiz

What is the primary disaccharide found in milk that provides energy?

• Maltose

• Sucrose

• Fructose

• Lactose

Which milk protein is primarily responsible for muscle building?

• Lactalbumin

• Whey

• Lactoglobulin

• Casein

What type of microorganisms are bacteria and archaea classified as?

• Fungi

• Eukaryotes

• Prokaryotes

• Viruses

Which of the following is a Gram-positive bacterium that can cause milk intoxication?

• E. coli

• Salmonella

• Listeria monocytogenes

• Staphylococcus aureus

What is the role of Lactobacillus in dairy products?

• Beneficial bacteria

• Spoilage organism

• None of the above

• Pathogen

Which of the following bacteria is known for causing botulism?

• Listeria monocytogenes

• E. coli

• Clostridium botulinum

• Bacillus cereus

What is the primary function of lysozyme in milk?

• Breaks down lactose

• Inhibits bacterial growth

• Promotes fermentation

• Enhances flavor

Which temperature range is optimal for mesophilic bacteria?

• 5-10°C

• 0-5°C

• 20-45°C

• 45-60°C

What is the primary cause of 'bitty cream' in milk?

• Psychrotrophic bacteria

• Lactobacillus

• Bacillus cereus

• E. coli

Which of the following is a characteristic of psychrotrophic bacteria?

• Survive pasteurization

• Grow best at high temperatures

• Require anaerobic conditions

• Grow at refrigeration temperatures