Factors Affecting Bacterial Growth (Leaving Cert Biology): Quizzes
📚Quizzes
Practise the questions
12 questions from this quiz
ShowHide
Practise the questions
12 questions from this quiz
Which factor does NOT affect bacterial growth?
Which factor does NOT affect bacterial growth?
Light intensity
What temperature range do most bacteria grow best in?
What temperature range do most bacteria grow best in?
25°C to 45°C
Why does temperature affect bacterial growth?
Why does temperature affect bacterial growth?
It affects enzymes
What are aerobic bacteria?
What are aerobic bacteria?
Bacteria needing oxygen to survive
What are obligate anaerobic bacteria?
What are obligate anaerobic bacteria?
Can only respire without oxygen
What are facultative anaerobic bacteria?
What are facultative anaerobic bacteria?
Can respire with or without oxygen
What are aerotolerant anaerobic bacteria?
What are aerotolerant anaerobic bacteria?
Don't need O₂ but survive in it
What pH do most bacteria require?
What pH do most bacteria require?
Neutral pH
What happens to bacteria in high solute concentration?
What happens to bacteria in high solute concentration?
Water leaves by osmosis, cell dies
In low solute concentration, what prevents bacteria from bursting?
In low solute concentration, what prevents bacteria from bursting?
The cell wall
How does high pressure inhibit bacterial growth?
How does high pressure inhibit bacterial growth?
Causes cell walls to collapse
How is high solute concentration used in food preservation?
How is high solute concentration used in food preservation?
Salting fish