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Cover Work and HomeworkA2 Biology

Part one: Who discovered antibiotics? Search for suitable images from google or flickr or the wellcome image collection and use

either http://comiqs.com/ or http://www.pimpampum.net/bubblr/ to create a short cartoon explaining how antibiotics were discovered. Email me the results.

Part two: The search for new antibiotics On page 124 in your textbook there is a section called searching for new antibiotics. Read

through the passage and answer the question (6.41) about effective treatment of TB. In your answer describe how you would test this, and discuss where the antibiotics come from. Brownie points if you can figure out why Antibiotics are called antibiotics....

Part three: How do antibiotics work?There are two types of antibiotics and they are classified by their method of action. Your task is

to look up the two names and write a brief profile (about one side of A5) about how they work, specific modes of action and named examples. P126 of your textbook is a good place to start...

Image from the wellcome collection

ANTIBIOTIC RESISTANCE

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On Monday you are go ing to invest igate the ef fectiveness of antibiotics in limiting bacterial growth. your cover work (thursday) and homework for mondays lesson is to plan the investigation, safety and introduction and be prepared to carry it out and fill in the results during the lesson.

You will be provided with two types of bacteria, E.Coli and B. Subtilis. Each student will be provided with two antibiotic rings and four agar plates. You will have access to an incubator at thirty degrees.

You will need to follow Aseptic Technique for the entire practical.

The method for plating you need to use is called spread plating. You need to research this method and be clear how you are going to achieve it before the investigation itself. Please note you do not have a glass spreader - you have a plastic spreader to use.

What are the variables you will be al ter ing? How to you plan on measuring the result? How will you know your variable has had an affect and it’s not just a random occurrence?

Your Risk assessment must follow the Potential Hazard - What could go wrong - how to prevent it format.

You must have an introduction (at least half a page of A4) that discusses the action of antibiotics on bacterial growth.

This is due Monday 5pm

h t t p : / / w w w. n i m r . m r c . a c . u k /millhillessays/2001/superbugs.htmhttp://www.hpa.org.uk/

“The greatest analgesic, soporific, stimulant, tranquilizer, narcotic, and to some extent even antibiotic -in short, the closest thing to a genuine panacea -known to medical science is work.”

Thomas S Szasz

Investigating Antibioticspreventing bacterial growth

A2 BIOLO

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Images from the Wellcome Image collection