AQA GCSE BIOLOGY Higher Tier Paper 2H 2021.

Please write clearly in block capitals. Centre number Candidate number Surname Forename(s) Candidate signature I declare this is my own work. GCSE BIOLOGY Higher Tier Paper 2H H 2 *02* IB/M/Jun21/8461/2H Answer all questions in the spaces provided. 0 1 The nucleus of a cell contains DNA. 0 1 . 1 Name the structures inside the cell nucleus that contain DNA. [1 mark] Figure 1 shows part of a DNA molecule. Figure 1 0 1 . 2 Name the part of the DNA molecule labelled X. [1 mark] 0 1 . 3 What type of substances are labelled A, C, G and T in Figure 1? [1 mark] Do not write outside the box 3 *03* Turn over ► IB/M/Jun21/8461/2H Do not write outside the Figure 2 box shows another section of a DNA molecule. Figure 2 Four of the substances you named in Question 01.3 are not labelled in part Y of Figure 2. Label each of these substances with the correct letter, A, C, G or T. Use information from other parts of Figure 2 to help you. [1 mark] 0 1 . 4 0 1 . 5 What is happening to the DNA in part Z of Figure 2? [1 mark] Tick () one box. Differentiation Evolution Fertilisation Replication 4 *04* IB/M/Jun21/8461/2H Do not write outside the box 8 0 1 . 6 A gene is a length of DNA. What type of substance does a gene code for? [1 mark] 0 1 . 7 Most human body cells contain 6 × 10–12 grams of DNA. What mass of DNA will a human sperm cell contain? [1 mark] Tick () one box. 6 × 10–6 grams 6 × 10–12 grams 3 × 10–6 grams 3 × 10–12 grams 0 1 . 8 What is the name of the type of cell division that produces sperm cells? [1 mark] Tick () one box. Binary fission Differentiation Meiosis Mitosis