Which microorganism is commonly used for ethanol production?
A
Penicillium chrysogenum B
Aspergillus niger C
Saccharomyces cerevisiae D
Corynebacterium glutamicum
Analysis & Theory
Saccharomyces cerevisiae (yeast) is widely used in ethanol fermentation.
Which strain is used for penicillin production?
A
Aspergillus niger B
Penicillium chrysogenum C
E. coli D
Lactobacillus
Analysis & Theory
Penicillium chrysogenum is optimized to produce penicillin in high amounts.
Which feature is NOT desirable in a production strain?
A
High product yield B
Fast growth rate C
Genetic instability D
Non-pathogenic nature
Analysis & Theory
Genetic instability can lead to reduced productivity and is undesirable.
Which method is used for precise editing of production strains?
A
Random mutation B
CRISPR-Cas9 C
Protoplast fusion D
Selective breeding
Analysis & Theory
CRISPR allows accurate gene editing to improve strain performance.
What is the primary purpose of using production strains in industry?
A
To study genetic diseases B
To clean wastewater C
To increase yield of useful products D
To act as food
Analysis & Theory
Production strains are used to efficiently produce desired bio-products.