15 – To Investigate Factors Affecting the Growth of Microorganisms (LC 2027) (Leaving Cert Biology): Quizzes
📚Quizzes
Practise the questions
11 questions from this quiz
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Practise the questions
11 questions from this quiz
Why is yeast chosen for lab investigations instead of bacteria?
Why is yeast chosen for lab investigations instead of bacteria?
It's generally harmless to humans
What two waste products does yeast produce when feeding on sugars?
What two waste products does yeast produce when feeding on sugars?
Ethanol and carbon dioxide
What is the key difference between aseptic and sterile conditions?
What is the key difference between aseptic and sterile conditions?
Aseptic removes pathogens; sterile removes all
What does a colorimeter measure in yeast growth investigations?
What does a colorimeter measure in yeast growth investigations?
Light absorbance
What does greater light absorbance indicate about a yeast culture?
What does greater light absorbance indicate about a yeast culture?
More yeast cells present
What three pH conditions are tested in the yeast growth investigation?
What three pH conditions are tested in the yeast growth investigation?
pH 4, 7, and 10
Why are flask necks flamed before and after use in the investigation?
Why are flask necks flamed before and after use in the investigation?
To prevent microorganism contamination
What is the purpose of the control in this investigation?
What is the purpose of the control in this investigation?
Repeat without adding yeast
What is a cuvette used for in this investigation?
What is a cuvette used for in this investigation?
Small container for colorimeter use
Which alternative factor can be tested to investigate yeast growth?
Which alternative factor can be tested to investigate yeast growth?
Temperature variations
Which pharmaceutical product can be manufactured using microorganisms?
Which pharmaceutical product can be manufactured using microorganisms?
Antibiotics