Isolate & Grow Bacteria (Leaving Cert Agricultural Science): 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 bacteria is isolated from clover root nodules?
What type of bacteria is isolated from clover root nodules?
Rhizobium bacteria
What colour are active root nodules on legume plants?
What colour are active root nodules on legume plants?
Pink or reddish
What protein causes the pink colour in root nodules?
What protein causes the pink colour in root nodules?
Leg-haemoglobin
Rhizobium converts atmospheric nitrogen () into which compound?
Rhizobium converts atmospheric nitrogen () into which compound?
Ammonia ()
What % of nitrogen needs can legumes meet through biological nitrogen fixation?
What % of nitrogen needs can legumes meet through biological nitrogen fixation?
Up to 80%
What concentration of ethanol is used to sterilise nodules?
What concentration of ethanol is used to sterilise nodules?
70% ethanol
At what temperature should the Petri dishes be incubated?
At what temperature should the Petri dishes be incubated?
25-28°C
What is the correct method sequence for isolating Rhizobium?
What is the correct method sequence for isolating Rhizobium?
Sterilise → crush → streak → incubate
What appearance indicates successful Rhizobium isolation?
What appearance indicates successful Rhizobium isolation?
Small, white, circular colonies
What is the main agricultural benefit of the Rhizobium-legume relationship?
What is the main agricultural benefit of the Rhizobium-legume relationship?
Reduces need for nitrogen fertilisers