C:-Symbiotic association between a fungus and roots of a vascular plant
D:-None of the above
Correct Answer:- Option-C
Question74:-Nisin is defined as which one of the following?
A:-Nucleotide, toxic to nerves
B:-Peptide, lantibiotic used as food preservative
C:-Carbohydrate with antimicrobial properties
D:-None of the above
Correct Answer:- Option-B

Question75:-The ratio of the water vapour pressure of food substrate to the vapour pressure of pure water at the same
temperature is known as ~

A:-Water activity
B:-Water pressure
C:-Partial pressure of water
D:-None of the above
Correct Answer:- Option-A
Question76:-Azotobacter is
A:-a plant pathogenic bacteria
B:-used for production of acetic acid
C:-free living bacteria which can fix nitrogen
D:-none of the above
Correct Answer:- Option-C
Question77:-Secondary metabolites are produced during which phase of growth cycle of a microbe?
A:-Log phase
Stationary phase
C:-Lag phase
D:-None of the above
Correct Answer:- Option-B
Question78:-The term 12D treatment refers to which of the following processes?
A:-Process which destroys psychrophilic bacteria
B:-Heat treatment sufficient to kill 12 bacteria
C:-12 different treatments used to preserve food
D:-a *10%(12)* reduction in C. botulinum endospores
Correct Answer:- Option-D
Question79:-Which one of the following reactions is considered to be undesirable in the process of wine-making?
A:-Conversion of glucose to pyruvic acid
B:-Conversion of ethanol to acetic acid
C:-Conversion of sucrose to ethanol
D:-All of the above
Correct Answer:- Option-B

Question80:-You have isolated a non-motile gram-positive cell with no visible nucleus. This cell will definitely posses which
of the following?

A:-Ribosome
B:-Lysosome
:-Mitochondria
D:-Golgi complex
Correct Answer:- Option-A
Question81:-Spirochaetes move with the help of which of the following?
A:-pseudopodia
B:-peritrichous flagella
:-axial filaments
D:-pili
Correct Answer:- Option-C
Question82:-Branching filamentous bacteria are known as
A:-Archaebacteria
B:-Agaricus
C:-Aspergillus
D:-Actinomycetes
Correct Answer:- Option-D