Using Microorganisms in Biotechnology (OCR A-Level Biology A): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What type of metabolite is penicillin produced by fungi?
What type of metabolite is penicillin produced by fungi?
Secondary metabolite
During bread making, yeast initially respires aerobically. What happens when oxygen is depleted?
During bread making, yeast initially respires aerobically. What happens when oxygen is depleted?
Yeast switches to alcoholic fermentation
Which bacterial species work synergistically in yoghurt production?
Which bacterial species work synergistically in yoghurt production?
L. bulgaricus & S. thermophilus
What is the liquid called that forms during brewing after mashing dissolves sugars from crushed grain?
What is the liquid called that forms during brewing after mashing dissolves sugars from crushed grain?
Wort
What type of fermentation process is used for mycoprotein (Quorn) production?
What type of fermentation process is used for mycoprotein (Quorn) production?
Continuous fermentation
At what temperature and pressure should glassware be autoclaved for aseptic technique?
At what temperature and pressure should glassware be autoclaved for aseptic technique?
121°C and 100 kPa for 15-20 minutes
Which growth measurement method counts ONLY viable (living) cells?
Which growth measurement method counts ONLY viable (living) cells?
Viable counting
If 45 colonies grow from 0.1 cm³ of a ×10000 dilution, what is the bacteria per cm³?
If 45 colonies grow from 0.1 cm³ of a ×10000 dilution, what is the bacteria per cm³?
4,500,000
During which growth phase do cells divide at their maximum rate with abundant nutrients?
During which growth phase do cells divide at their maximum rate with abundant nutrients?
Log (exponential) phase
What are the six essential components required in any culture medium?
What are the six essential components required in any culture medium?
Energy, carbon, nitrogen, salts, H2O