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Drawings in Biology

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Hey Guys!

Does anybody have a list of all the drawings that we need to know for Biology HL? Also, a lot of the drawings in our textbook have a lot of extra details at a level we do not need to know. Does anybody have know how much in detail we need to know these drawings. 


P.S - The list of drawings is more important :)



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I know that the bio exam is over now, but in order not to make a new post for this purpose I figured i might post the list and explanations here. This is all from the IB Biology 2016 syllabus subject guide. I included only those you need to explicitly draw and not drawings that you should annotate etc. Hopefully it will be of use to someone next year ;)


1. Skill: Drawing of the ultrastructure of prokaryotic cells based on electron micrographs.

Drawings of prokaryotic cells should show the cell wall, pili and flagella, and plasma membrane enclosing cytoplasm that contains 70S ribosomes and a nucleoid with naked DNA.

2. Skill: Drawing of the ultrastructure of eukaryotic cells based on electron micrographs.

Drawings of eukaryotic cells should show a plasma membrane enclosing cytoplasm that contains 80S ribosomes and a nucleus, mitochondria and other membrane-bound organelles are present in the cytoplasm. Some eukaryotic cells have a cell wall.

3. Skill: Drawing of the fluid mosaic model

Drawings of the fluid mosaic model of membrane structure can be two dimensional rather than three dimensional. Individual phospholipid molecules should be shown using the symbol of a circle with two parallel lines attached. A range of membrane proteins should be shown including glycoproteins.


4. Skill: Drawing molecular diagrams of glucose, ribose, a saturated fatty acid and a generalized amino acid.

Only the ring forms of D-ribose, alpha–D-glucose and beta-D-glucose are expected in drawings.

5. Skill: Drawing molecular diagrams to show the formation of a peptide bond.

6. Skill: Drawing simple diagrams of the structure of single nucleotides of DNA and RNA, using circles, pentagons and rectangles to represent phosphates, pentoses and bases.

In diagrams of DNA structure, the helical shape does not need to be shown, but the two strands should be shown antiparallel. Adenine should be shown paired with thymine and guanine with cytosine, but the relative lengths of the purine and pyrimidine bases do not need to be recalled, nor the numbers of hydrogen bonds between the base pairs.

7. Skill: Drawing an absorption spectrum for chlorophyll and an action spectrum for photosynthesis.


8. Skill: Drawing diagrams to show the stages of meiosis resulting in the formation of four haploid cells.

Drawings of the stages of meiosis do not need to include chiasmata


9. Skill: Quantitative representations of energy flow using pyramids of energy.

Pyramids of energy should be drawn to scale and should be stepped, not triangular. The terms producer, first consumer and second consumer and so on should be used, rather than first trophic level, second trophic level and so on.


10. Draw a diagram to show the structure of an alveolus and an adjacent capillary.


11.  Skill: Drawing the structure of primary xylem vessels in sections of stems based on microscope images.

12. Skill: Drawing internal structure of seeds.

13. Skill: Drawing of half-views of animal-pollinated flowers.


14. Skill: Drawing diagrams to show chiasmata formed by crossing over.

Diagrams of chiasmata should show sister chromatids still closely aligned, except at the point where crossing over occurred and a chiasma was formed.


15. Skill: Drawing labelled diagrams of the structure of a sarcomere.

Drawing labelled diagrams of the structure of a sarcomere should include Z lines, actin filaments, myosin filaments with heads, and the resultant light and dark bands.

16. Skill: Drawing and labelling a diagram of the human kidney.


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