Biology > QUESTION PAPER (QP) > Pearson Edexcel Level 3 GCE [Biology A (Salters Nuffield) Advanced Subsidiary PAPER 1: Lifestyle, Tr (All)

Pearson Edexcel Level 3 GCE [Biology A (Salters Nuffield) Advanced Subsidiary PAPER 1: Lifestyle, Transport, Genes and Health]

Document Content and Description Below

Some questions must be answered with a cross in a box . If you change your mind about an answer, put a line through the box and then mark your new answer with a cross . 1 (a) The diagram shows part ... of a mRNA base sequence. A U G C U A G G C A C G U A U A C G G G C (i) Give the sequence of the first six bases of the DNA that was transcribed to give this mRNA sequence. (1) .................................................................................................................................................................................................................................................................................... (ii) Give the maximum number of amino acids that would be in the part of the polypeptide chain produced from this mRNA base sequence. (1) .................................................................................................................................................................................................................................................................................... (iii) Give the maximum number of different tRNA molecules that would be needed to produce the polypeptide chain produced from this base sequence. (b) Describe the role of mRNA in protein synthesis. (3) .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... ................................................................................................................................................................................................................................................................................... 2 Vitamin C can be found in fruits and vegetables. The vitamin C content of four fruits was sampled on the day of picking and one week after picking. The results are shown in the table. Fruit Vitamin C / mg per 100g of fruit Day of picking One week after picking Apple 27 7 Guava 70 53 Pineapple 53 28 Orange 75 52 (a) (i) Calculate the percentage decrease in the vitamin C content of the pineapple to one decimal place. (b) (i) Complete the table to show the details of a reagent that could be used to show if vitamin C was present. [Show More]

Last updated: 2 years ago

Preview 1 out of 32 pages

Buy Now

Instant download

We Accept: