• These are the command terms that the questions of the IB exam will use. Have a working knowledge of each term so you know how to correctly answer the questions.
  • Here is the IB Examination Schedule for May 2010
  • Your exam is made up of three papers, the break down for each paper is below. Notice that paper 1 is multiple choice and you must do all the questions, paper 2 has two section where you must do section A and then you get a choice of completing two of the four questions of section B, paper 3 is short answer and extended response in the two options you feel most comfortable writing about.


Topic Outlines

Answer Key to the Practise Exam

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Things to study

What is a T-test?

IBO statement:

  • Deduce the significance of the difference between two sets of data using calculated values for t and the appropriate tables.


  • For the t-test to be applied, the data must have a normal distribution and a sample size of at least 10. The t-test can be used to compare two sets of data and measure the amount of overlap. Students will not be expected to calculate values of t. Only a two-tailed, unpaired t-test is expected.

    • Aim 7: While students are not expected to calculate a value for the t-test, students could be shown how to calculate such values using a spreadsheet program or the graphic display calculator.

    • TOK: The scientific community defines an objective standard by which claims about data can be made.

Describe the differences between a prokaryotic and eukaryotic cell.

Compare and Contrast Monocot versus Dicot plants.

Describe a Bacterial Plasmid

  • bacterial plasmid is a strand of DNA inside a bacterium which is independent of the bacterium's chromosomal DNA. Plasmids are capable of replicating on their own, and they can be passed between organisms, an important trait for bacteria, as they use plasmids to transfer genetic information between each other. This ability also becomes important for researchers, who use bacterial plasmids as vectors to insert foreign DNA into DNA they are researching.
  • The structure of a plasmid is often double stranded and circular. It can contain a varying length of genetic information, and there are several different kinds of plasmids which can perform different functions. Some, for example, can perform conjugation, connecting with another bacterium to transfer genetic information. Others carry genetic information which confers antibiotic resistance, helps a bacterium break down nutrients to make them accessible, or makes the bacterium virulent. These plasmids cannot conjugate on their own; they need help from a conjugating plasmid.