Biology 9-1 0970: Movement In and Out of Cells Topical Past Paper Questions

Fig. 2.1 shows red blood cells in three different concentrations of salt solution. Fig. 2.1 (a) (i) Using the information in Fig. 2.1, state the letter of the salt solution that has a concentration similar to blood plasma. Explain your choice. salt solution explanation (ii) Using…

A student investigated the effect of acid concentration on the rate of diffusion in agar jelly. The student was given three test-tubes containing bromothymol blue indicator in agar jelly. Bromothymol blue is a blue indicator that turns yellow in the presence of an acid. The stude…

Fig. 2.1 is a photograph of a cross-section of a root from a carrot plant, Daucus carota. Fig. 2.1 (a) (i) Draw a large diagram of the carrot root cross-section that shows the layers visible in Fig. 2.1. (ii) Line PQ on Fig. 2.1 represents the diameter of the carrot root cross-se…