Science Combined 0653: B3. Biological molecules Topical Past Paper Questions

A student states, 'Unripe tomatoes do not contain reducing sugars. Ripe tomatoes do contain reducing sugars.' Figure 2.1 shows an unripe (green) tomato and a ripe (red) tomato. Figure 2.1 Plan an investigation to test whether the student's statement is correct. You are provided w…

(a) Fig. 2.1 shows a plant cell before and after being immersed in a concentrated salt solution. Fig. 2.1 (i) State the name of the effect shown in Fig. 2.1. [1] (ii) The plant cell in Fig. 2.1 is now removed from the salt solution and immersed in pure water for 60 minutes. Expla…

Which small biological molecules are used to make proteins? A amino acids B fatty acids C glucose D glycerol