Sonali Thanks for this, mea culpa!
D3.3 Homeostasis - model answersa) Outline the molecules reabsorbed by the proximal tubule of the nephron. (2 marks) Reabsorption of nutrients/glucose and amino acids/vitamins/ plasma proteins / water. (Two types mentioned for 2 marks) plasma...
D3.3 Homeostasis - model answersKatharine Thanks for pointing this out. I agree, there should be a mark for epigenetic factors (1 mark) and a valid example (1 mark)
D2.2 Gene expression - model answersHi David and Richard, we are on the Invasive species section and would love the sample markschemes to comapre our answers to! Thanks!
Invasive species (2025)For the last question about regulation of transcription - would you not think that epigenetic factors are also relevant here and should appear on the markscheme since methylation of DNA and histones also regulates transcription.
D2.2 Gene expression - model answersIt's also missing the answer key for a description of the final GIF animation.
Translation & ribosome binding sites (2025)The Link to "Build a paper model of tRNA" doesn't work.
Translation & ribosome binding sites (2025)Hi, Can I please have the answers for activity 1?
Gene Linkage 2 (2025)Christine It is easiest to adhere to the IB markscheme, which usually states 1 mark for each tissue "correctly drawn and labelled" to a maximum mark, probably 5 for each here. Correct means the location and relative size of the tissue...
Transport in plants (2025)
David
Site authorDear Kaoser, Thanks for your comment, I have updated the broken link to the Biology project.While doing that I also added a short NOS style activity which allows students to read some early evidence about the movement of chromosomes and...
Di-Hybrid Crosses HL (2025)