IB Exploration Practice 1 - DNA

The careful design of an experiment and identification of variables is crucial to the successful collection of data.  IB specifically designates three aspects (selecting variables, controlling variables, and procedural methods) included in the design portion of an experimental investigation.

To practice completing the Design Standard and corresponding aspects, you will work with other students to create a experimental investigation to assess the DNA extraction protocols used in the DNA Extraction Lab Protocols.  

This means your group will be designing an experiment (but not conducting) to test the effect of changing the selected protocol on the either the quantity or quality of DNA extracted, i.e. you will decide on variables to alter in order to attempt to improve the quantity or quality of DNA extracted. Only one overall experimental Design is required per group for only one of DNA extraction protocols. 

Defining the Research Question:

In this practice, you will be working on the following basic question: How does __________ affect the yield/quality (you pick one) of DNA extracted from ____________?

Define is a command term that means to give a precise meaning of a word, phrase of physical quantity. It is sometimes helpful with a definition to provide an example if possible.

Rewrite the problem statement as a research question. Use the precise meanings you have developed.  From this, write a testable, specific and detailed hypothesis.

Outlining the Procedure & Stating Variable

The command term outline requires you to give a brief outline or summary, while state asks you to give a specific name, value or other brief answer without explanation or calculation. Describe requires you to give a detailed account.

Example Format of Design Write-Up

Turn-In:

Create one google document for your group with all members names on the document.  Only the owner will be able to turn in the document on Google Classroom, each other member can mark the assignment as done when complete.

Assessment, Exploration:

This criterion assess the extent to which the student establishes the scientific context for the work, states a clear and focused research question and uses concepts and techniques appropriate for the Diploma Program level.  Where appropriate, this criterion also assesses awareness of safety, environmental, and ethical considerations.

IB Mark

TuHS Mark

Descriptor

5-6

Exceeds (4)

  • The topic of the investigation is identified and a relevant and fully focused research question is clearly described.
  • The background information provided for the investigation is entirely appropriate and relevant and enhances the understanding of the context of the investigation.
  • The methodology of the investigation is highly appropriate to address the research question because it takes into consideration all, or nearly all, of the significant factors that may influence the relevance, reliability and sufficiency of the collected data.
  • The report shows evidence of full awareness of the significant safety, ethical or environmental issues that are relevant to the methodology of the investigation.

3-4

Meets (3)

  • The topic of the investigation is identified and a relevant but not fully focused research question is described
  • The background information provided for the investigation is mainly appropriate and relevant and aids the understanding of the context of the investigation
  • The methodology of the investigation is mainly appropriate to address the research question but has limitations since it takes into consideration only some of the significant factors that may influence the relevance, reliability and sufficiency of the collected data
  • The report shows evidence of some awareness of the significant safety, ethical or environmental issues that are relevant to the methodology of the investigation*

1-2

Nearly Meets (2)

  • The topic of the investigation is identified and a research question of some relevance is stated but it is not focused
  • The background information provided for the investigation is superficial or of limited relevance and does not aid the understanding of the context of the investigation
  • The methodology of the investigation is only appropriate to address the research question to a very limited extent since it takes into consideration few of the significant factors that may influence the relevance, reliability and sufficiency of the collected data
  • The report shows evidence of limited awareness of the significant safety, ethical or environmental issues that are relevant to the methodology of the investigation.

0

Beginning (1)

            The student’s report does not reach a standard described by the descriptors above.

Exploration Further Explanation: