As Biology (7401/1) Paper 1 Specimen 2014 39 Correctly Answered Questions Latest Update

02 . 3) Describe and explain the differences between the two curves. [5 marks] {Ans: 1. Initial rate of reaction faster at 37 °C; 2. Because more kinetic energy; 3. So more E-S collisions/more E-S complexes formed; 4. Graph reaches plateau at 37 °C; 5. Because all substrate used up;}01 . 2) (Figure 1 shows a photograph of a chloroplast taken with an electron microscope. Figure 1) Name the parts of the chloroplast labelled A and B. [2 marks] {Ans: 1. A stroma; 2. B granum;}03 . 2) Describe what has happened during division 1 in Figure 3. [2 marks] {Ans: 1. Chromosomes in homologous pair; 2. One of each into daughter cells / haploid number;}07 . 3) Name the type of bond between A and fatty acid X. [1 mark] {Ans: Ester;}05 . 3) Scientists investigated the effect of hunting on the genetic diversity of otters. Otters are animals that were killed in very large numbers for their fur in the past. The scientists obtained DNA from otters alive today and otters that were alive before hunting started. For each sample of DNA, they recorded the number of base pairs in alleles of the same