Food Biotechnology — Part 1 MCQs with Explanations
Practice high-yield Biotechnology Engineering MCQs on Food Biotechnology — Part 1 with worked academic solutions for PPSC, FPSC, NIH, NTS.
Questions
40
Difficulty Level
Exam-Level
Target Exams
PPSC, FPSC, NIH...
Estimated Time
48 mins
Exam-Level PPSC FPSC NIH NTS
Verified for Commission Syllabus • Oct 14, 2026
40
Verified Practice Questions
Interactive test mode with detailed academic worked solutions
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🎉 Set complete! All 40 questions answered.
Question 1 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
The most common microorganisms in freshly drawn milk is
Correct Answer: Option A — Staphylococcus epidermidis
Detailed Academic Explanation:
Staphylococcus epidermidis is the correct answer to “The most common microorganisms in freshly drawn milk is”. This question is standard in competitive examination syllabi for Food Biotechnology.
💡Key Conceptual Anchor:Food Biotechnology
Question 2 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
Food spoilage may be defined as
Correct Answer: Option A — Any change in the appearance, smell or taste of food products that makes them unacceptable to the consumers
Detailed Academic Explanation:
Any change in the appearance, smell or taste of food products that makes them unacceptable to the consumers is the correct answer to “Food spoilage may be defined as”. This question is standard in competitive examination syllabi for Food Biotechnology.
💡Key Conceptual Anchor:Food Biotechnology
Question 3 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
The shelf life of a perishable product is often determined by the number of microbes present
Correct Answer: Option A — Initially
Detailed Academic Explanation:
Initially is the correct answer to “The shelf life of a perishable product is often determined by the number of microbes present”. This question is standard in competitive examination syllabi for Food Biotechnology.
💡Key Conceptual Anchor:Food Biotechnology
Question 4 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
Which of the following are the examples of perishable food?
Correct Answer: Option D — All the above
Detailed Academic Explanation:
All the above is the correct answer to “Which of the following are the examples of perishable food”. This question is standard in competitive examination syllabi for Food Biotechnology.
💡Key Conceptual Anchor:Food Biotechnology
Question 5 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
The organisms responsible for yoghurt formation is
Correct Answer: Option B — Streptococcus salivarius sp. Thermophilus
Detailed Academic Explanation:
Streptococcus salivarius sp. Thermophilus is the correct answer to “The organisms responsible for yoghurt formation is”. This question is standard in competitive examination syllabi for Food Biotechnology.
💡Key Conceptual Anchor:Food Biotechnology
Question 6 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
Bacteria cannot survive in a highly salted pickles because
Correct Answer: Option D — Bacteria become plasmolysed and are consequently killed
Detailed Academic Explanation:
Bacteria become plasmolysed and are consequently killed is the correct answer to “Bacteria cannot survive in a highly salted pickles because”. This question is standard in competitive examination syllabi for Food Biotechnology.
💡Key Conceptual Anchor:Food Biotechnology
Question 7 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
Which fermented food is produced from milk?
Correct Answer: Option D — All the above
Detailed Academic Explanation:
All the above is the correct answer to “Which fermented food is produced from milk”. This question is standard in competitive examination syllabi for Food Biotechnology.
💡Key Conceptual Anchor:Food Biotechnology
Question 8 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
Sodium or calcium propionate is used extensively in the prevention of
Correct Answer: Option D — Molds
Detailed Academic Explanation:
Molds is the correct answer to “Sodium or calcium propionate is used extensively in the prevention of”. This question is standard in competitive examination syllabi for Food Biotechnology.
💡Key Conceptual Anchor:Food Biotechnology
Question 9 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
Who is known as the father of canning?
Correct Answer: Option C — Nicholas Apert
Detailed Academic Explanation:
Nicholas Apert is the correct answer to “Who is known as the father of canning”. This question is standard in competitive examination syllabi for Food Biotechnology.
💡Key Conceptual Anchor:Food Biotechnology
Question 10 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
Fungi associated with blue cheese are
Correct Answer: Option A — Penicillium roqueforti and Aspergillus
Detailed Academic Explanation:
Penicillium roqueforti and Aspergillus is the correct answer to “Fungi associated with blue cheese are”. This question is standard in competitive examination syllabi for Food Biotechnology.
💡Key Conceptual Anchor:Food Biotechnology
Question 11 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
Meat is regarded as good culture medium for microbes due to
Correct Answer: Option D — All the above
Detailed Academic Explanation:
All the above is the correct answer to “Meat is regarded as good culture medium for microbes due to”. This question is standard in competitive examination syllabi for Food Biotechnology.
💡Key Conceptual Anchor:Food Biotechnology
Question 12 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
What is true about canning?
Correct Answer: Option D — All the above
Detailed Academic Explanation:
All the above is the correct answer to “What is true about canning”. This question is standard in competitive examination syllabi for Food Biotechnology.
💡Key Conceptual Anchor:Food Biotechnology
Question 13 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
Which mushrooms can be grown on straw?
Correct Answer: Option D — All the above
Detailed Academic Explanation:
All the above is the correct answer to “Which mushrooms can be grown on straw”. This question is standard in competitive examination syllabi for Food Biotechnology.
💡Key Conceptual Anchor:Food Biotechnology
Question 14 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
Paralytic shellfish poisoning is a food-borne illness that typically develops after consumption of shellfish contaminated chiefly with the heat stable and acid soluble toxin
Correct Answer: Option C — Saxitoxin
Detailed Academic Explanation:
Saxitoxin is the correct answer to “Paralytic shellfish poisoning is a food-borne illness that typically develops after consumption of shellfish contaminated chiefly with the heat stable and acid soluble toxin”. This question is standard in competitive examination syllabi for Food Biotechnology.
💡Key Conceptual Anchor:Food Biotechnology
Question 15 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
Which of the following microbes compete well for free water under conditions of low a w and often w grow well in high sugar foods such as syrup
Correct Answer: Option C — Molds
Detailed Academic Explanation:
Molds is the correct answer to “Which of the following microbes compete well for free water under conditions of low a w and often w grow well in high sugar foods such as syrup”. This question is standard in competitive examination syllabi for Food Biotechnology.
💡Key Conceptual Anchor:Food Biotechnology
Question 16 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
Which organism has been used for commercial production of SCP from starch hydrolysates?
Correct Answer: Option C — Fusarium gaminearum
Detailed Academic Explanation:
Fusarium gaminearum is the correct answer to “Which organism has been used for commercial production of SCP from starch hydrolysates”. This question is standard in competitive examination syllabi for Food Biotechnology.
💡Key Conceptual Anchor:Food Biotechnology
Question 17 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
The microbial inhibitors in raw milk include
Correct Answer: Option D — All the above
Detailed Academic Explanation:
All the above is the correct answer to “The microbial inhibitors in raw milk include”. This question is standard in competitive examination syllabi for Food Biotechnology.
💡Key Conceptual Anchor:Food Biotechnology
Question 18 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
For temporary preservation, fruits and vegetables must be stored at
Correct Answer: Option A — 10 - 20°C
Detailed Academic Explanation:
10 - 20°C is the correct answer to “For temporary preservation, fruits and vegetables must be stored at”. This question is standard in competitive examination syllabi for Food Biotechnology.
💡Key Conceptual Anchor:Food Biotechnology
Question 19 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
Which one of the following species is used in the preparation of Soy sauce?
Correct Answer: Option D — A. oryzae
Detailed Academic Explanation:
A. oryzae is the correct answer to “Which one of the following species is used in the preparation of Soy sauce”. This question is standard in competitive examination syllabi for Food Biotechnology.
💡Key Conceptual Anchor:Food Biotechnology
Question 20 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
Which of the following source contributes to microflora of raw milk?
Correct Answer: Option D — All the above
Detailed Academic Explanation:
All the above is the correct answer to “Which of the following source contributes to microflora of raw milk”. This question is standard in competitive examination syllabi for Food Biotechnology.
💡Key Conceptual Anchor:Food Biotechnology
Question 21 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
The primary bacterial spoilage of poultry meat at low temperature, with characteristic sliminess at outer surface, is caused by
Correct Answer: Option A — Pseudomonas spp.
Detailed Academic Explanation:
Pseudomonas spp. is the correct answer to “The primary bacterial spoilage of poultry meat at low temperature, with characteristic sliminess at outer surface, is caused by”. This question is standard in competitive examination syllabi for Food Biotechnology.
💡Key Conceptual Anchor:Food Biotechnology
Question 22 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
In Ultra-High Temperature (UHT) treatment, milk is heated at
Correct Answer: Option B — 140 - 150°C for 1 - 5 sec.
Detailed Academic Explanation:
140 - 150°C for 1 - 5 sec. is the correct answer to “In Ultra-High Temperature (UHT) treatment, milk is heated at”. This question is standard in competitive examination syllabi for Food Biotechnology.
💡Key Conceptual Anchor:Food Biotechnology
Question 23 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
Food preservation is a most important component of
Correct Answer: Option D — Food processing
Detailed Academic Explanation:
Food processing is the correct answer to “Food preservation is a most important component of”. This question is standard in competitive examination syllabi for Food Biotechnology.
💡Key Conceptual Anchor:Food Biotechnology
Question 24 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
The gas forming culture of Propionibacterium shermanii and P. freudenreichii are essential for giving swiss cheese
Correct Answer: Option A — Its eyes or holes and flavour
Detailed Academic Explanation:
Its eyes or holes and flavour is the correct answer to “The gas forming culture of Propionibacterium shermanii and P. freudenreichii are essential for giving swiss cheese”. This question is standard in competitive examination syllabi for Food Biotechnology.
💡Key Conceptual Anchor:Food Biotechnology
Question 25 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
Which microbe can be transmitted by milk, and can survive in milk heated to 143°C for 30 minutes?
Correct Answer: Option C — Coxiella burnettii
Detailed Academic Explanation:
Coxiella burnettii is the correct answer to “Which microbe can be transmitted by milk, and can survive in milk heated to 143°C for 30 minutes”. This question is standard in competitive examination syllabi for Food Biotechnology.
💡Key Conceptual Anchor:Food Biotechnology
Question 26 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
Citric acid is used as an acidulate in
Correct Answer: Option D — All the above
Detailed Academic Explanation:
All the above is the correct answer to “Citric acid is used as an acidulate in”. This question is standard in competitive examination syllabi for Food Biotechnology.
💡Key Conceptual Anchor:Food Biotechnology
Question 27 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
Most of the vegetables can be stored safely at temperature
Correct Answer: Option A — Less than 10°C
Detailed Academic Explanation:
Less than 10°C is the correct answer to “Most of the vegetables can be stored safely at temperature”. This question is standard in competitive examination syllabi for Food Biotechnology.
💡Key Conceptual Anchor:Food Biotechnology
Question 28 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
When lactose is hydrolysed by lactase, which monosaccharides are produced?
Correct Answer: Option B — D-glucose and β-D-galactose
Detailed Academic Explanation:
D-glucose and β-D-galactose is the correct answer to “When lactose is hydrolysed by lactase, which monosaccharides are produced”. This question is standard in competitive examination syllabi for Food Biotechnology.
💡Key Conceptual Anchor:Food Biotechnology
Question 29 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
Water activity a w is lowest in
Correct Answer: Option D — Dehydrated foods
Detailed Academic Explanation:
Dehydrated foods is the correct answer to “Water activity a w is lowest in”. This question is standard in competitive examination syllabi for Food Biotechnology.
💡Key Conceptual Anchor:Food Biotechnology
Question 30 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
Which of the following is an excellent example of food preservation by using moist heat under pressure?
Correct Answer: Option C — Canning
Detailed Academic Explanation:
Canning is the correct answer to “Which of the following is an excellent example of food preservation by using moist heat under pressure”. This question is standard in competitive examination syllabi for Food Biotechnology.
💡Key Conceptual Anchor:Food Biotechnology
Question 31 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
Diabetic ice cream contains which sugar source?
Correct Answer: Option D — Saccharin
Detailed Academic Explanation:
Saccharin is the correct answer to “Diabetic ice cream contains which sugar source”. This question is standard in competitive examination syllabi for Food Biotechnology.
💡Key Conceptual Anchor:Food Biotechnology
Question 32 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
The causal organism of ergot poisoning commonly referred to as "ergotism" is
Correct Answer: Option C — Claviceps
Detailed Academic Explanation:
Claviceps is the correct answer to “The causal organism of ergot poisoning commonly referred to as "ergotism" is”. This question is standard in competitive examination syllabi for Food Biotechnology.
💡Key Conceptual Anchor:Food Biotechnology
Question 33 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
Germinating barley seeds are used for preparation of
Correct Answer: Option D — Beer
Detailed Academic Explanation:
Beer is the correct answer to “Germinating barley seeds are used for preparation of”. This question is standard in competitive examination syllabi for Food Biotechnology.
💡Key Conceptual Anchor:Food Biotechnology
Question 34 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
Non-perishable foods include
Correct Answer: Option A — Sugar
Detailed Academic Explanation:
Sugar is the correct answer to “Non-perishable foods include”. This question is standard in competitive examination syllabi for Food Biotechnology.
💡Key Conceptual Anchor:Food Biotechnology
Question 35 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
Choose the target organisms for milk pasteurization from the following?
Correct Answer: Option B — Coxiella burnetii'
Detailed Academic Explanation:
Coxiella burnetii' is the correct answer to “Choose the target organisms for milk pasteurization from the following”. This question is standard in competitive examination syllabi for Food Biotechnology.
💡Key Conceptual Anchor:Food Biotechnology
Question 36 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
To be effective, lactoferrin must have
Correct Answer: Option B — Low iron environment with bicarbonate
Detailed Academic Explanation:
Low iron environment with bicarbonate is the correct answer to “To be effective, lactoferrin must have”. This question is standard in competitive examination syllabi for Food Biotechnology.
💡Key Conceptual Anchor:Food Biotechnology
Question 37 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
Quality of food is tested by
Correct Answer: Option D — All the above
Detailed Academic Explanation:
All the above is the correct answer to “Quality of food is tested by”. This question is standard in competitive examination syllabi for Food Biotechnology.
💡Key Conceptual Anchor:Food Biotechnology
Question 38 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
Botulism is caused by
Correct Answer: Option C — Clostridium botulinum
Detailed Academic Explanation:
Clostridium botulinum is the correct answer to “Botulism is caused by”. This question is standard in competitive examination syllabi for Food Biotechnology.
💡Key Conceptual Anchor:Food Biotechnology
Question 39 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
Most bacteria are inhibited by a concentration of 7.5% sodium chloride, with exception of some gram-positive cocci such as
Correct Answer: Option A — Staphylococcus
Detailed Academic Explanation:
Staphylococcus is the correct answer to “Most bacteria are inhibited by a concentration of 7.5% sodium chloride, with exception of some gram-positive cocci such as”. This question is standard in competitive examination syllabi for Food Biotechnology.
💡Key Conceptual Anchor:Food Biotechnology
Question 40 of 40
★ PPSC
★ FPSC
★ PPSC
★ FPSC
Miso is culture of
Correct Answer: Option A — Aspergillusoryzae
Detailed Academic Explanation:
Aspergillusoryzae is the correct answer to “Miso is culture of”. This question is standard in competitive examination syllabi for Food Biotechnology.
💡Key Conceptual Anchor:Food Biotechnology
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Analytical Tools In Biotechnology — Part 1
Master the next curriculum module with 40 exam-standard MCQs.
💡Examiner's Advisory for Biotechnology Engineering
In competitive commission exams (FPSC, PPSC, KPPSC, SPSC, CSS, PMS), questions are frequently phrased with distractor options designed to catch rote learners. Whenever you answer an MCQ, read the Detailed Academic Explanation and Conceptual Anchor to understand why the remaining options are incorrect.