AS LEVEL BIO 9700 | MAY JUNE 2026 P21 FULL SOLVED | PART 2/2 | PAST PAPER SOLUTION

In this video, we continue the FULL SOLUTION of Cambridge AS Level Biology 9700 May/June 2026 Paper 21 (P21). This is Part 2/2 of the complete past paper solution, where the remaining questions are solved and explained step-by-step. 0:00 - INTRO 0:44 - Q4 A student investigated the structure of muscular arteries. Figure 4.1 is a photomicrograph of a transverse section (TS) of a muscular artery and surrounding tissue. Figure 4.2 is a photomicrograph of part of a TS of the muscular artery as indicated in Figure 4.1. 8:32 - Q5 Mesophyll cells in plant leaves synthesise sucrose from the products of photosynthesis. The enzyme sucrose synthase catalyses the final reaction in the synthesis of sucrose. 13:55 - Q6 Monoclonal antibodies are used in many diagnostic tests. Figure 6.1 shows stages in the production of a monoclonal antibody