• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

Core practicalWhy do they put mint in toothpaste? Would garlic be better?)

Extracts from this document...


Core practical Why do they put mint in toothpaste? Would garlic be better? Introduction:- Plants are susceptible to infection by bacteria and fungi; they do every thing to repel such attacks. we know that several plants can destroy or inhibit the growth of certain bacteria. These plants are known as antibacterial. Chemicals in antibacterial plant cells are toxic to bacteria or interfere with their metabolism in some other way. Aim of experiment:- To investigate the antibacterial properties of plant. Hypothesis:- The hypothesis given is that garlic will have higher antibacterial properties than mint. Method Apparatus:- * Agar plate seeded with bacteria * Plant material(garlic cloves and mint leaves) * Pestle and mortar * 10 cm3 industrial methylated spirits * pipette(sterile) ...read more.


* Place the plates in to an incubator and leave for 24 hours at 25oC. Safety issues:- * Methanol is toxic and flammable keep away from skin and sprit burner. * Wear lab coat, goggle to prevent bacteria getting on skin and clothes. * Do not open Petri dishes containing growing micro organisms they can spread out. * Do not throw the plates in the bin as they contain harmful bacteria they will need to be autoclaved Results:- The result proven the given hypothesises that garlic has a higher antibacterial properties than mint. It is for reason that no bacteria spread over the garlic in any Petri dishes but there was bacteria over the mint and water. ...read more.


Evaluation:- It was found that garlic has more antibacterial properties than mint and control substance as water. no bacteria found in garlic and it has a toxic effect than mint and water. As mint is not antibacterial we can use Triclosatic in toothpaste by not using mint as it can not kill the bacteria and garlic as it has toxic chemical and do not provide freshness. Summary:- The result appeared to be accurate and proven the given hypothesis. As plants are susceptible to infection by bacteria and fungi. as garlic has higher antibacterial property than water(control)and mint. And it can kill the bacteria as it has toxic effect and do not provide freshness to the mouth that's why they put mint in toothpaste. Reference:- Salter -Nuffield Advanced Biology, Activity 4.7. ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our AS and A Level Genetics, Evolution & Biodiversity section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related AS and A Level Genetics, Evolution & Biodiversity essays

  1. Investigating what effect varying the concentration of copper sulphate has on the enzyme Catalase ...

    oxygen is produced due to the inhibitor binding to the active site of the enzyme and not the substrate. The reason why the rate of reaction is so high for the first concentration is because there is no inhibitor for the substrate to compete with so the substrate can bind

  2. Investigating the effect of trampling on salt marsh

    By controlling these independent factors, a lot of the dependant factors were effectively controlled e.g.- by using the same trowel, all soil samples were likely to be more even thus, when performing salinity tests equal samples could be used. Also, using the same quadrat introduced a certain consistency when recording the results; it decreased chances of anomalous data.

  1. Is Biological Control Better than Chemical Control?

    The disease breaks out within the scale insect population. However, the population is not wiped out completely, and fungi can only work efficiently in humid conditions, such as rainforests or tea-leave plantations like those in Sri-Lanka. The Larvae of many butterflies and moths eat away at the foliage of many important plants.

  2. Cell Theory - Discuss the theory that living organisms are composed of cells.

    together * mRNA strand completed 2.6.3 Describe the genetic code in terms of codons composed of triplets of bases. * genetic code expressed in three-letter codons * each codon specifies a certain amino acid 2.6.4 Explain the process of translation, leading to peptide linkage formation.

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work