Biology 0610 · IGCSE · Chromosomes, genes and proteins
Chromosomes, genes and proteins — practice question
Fig. 2.1 shows part of a DNA molecule in diagram form.
(a)[1]
Draw a circle on Fig. 2.1 so that one pair of bases is identified.
(b)[1]
Calculate the percentage of bases that would be base G in this species' DNA.
(c(i))[1]
State the term used for a length of DNA that codes for a protein.
(c(ii))[5]
Explain how proteins are produced by a cell.
(c(iii))[2]
State two kinds of cell membrane proteins.
Worked solution & mark scheme
This 10-mark question has a full step-by-step worked solution and mark scheme. One marking point: “circle a single pair of inward-pointing horizontal sections that face each other” …