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A-level BIOLOGY (7402/1) Aqa Paper 1 June 2022 Final Mark scheme Version: 1.0

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A-level BIOLOGY (7402/1) Aqa Paper 1 June 2022 Final Mark scheme Version: 1.0 Question Marking Guidance Mark Comments 01.1 Structure 1. Nuclear envelope and pores OR Double membrane and pores; 2. Chromosomes/chromatin OR DNA with histones; 3. Nucleolus/nucleoli; Function 4. (Holds/stores) genetic information/material for polypeptides (production) OR (Is) code for polypeptides; 5. DNA replication (occurs); 6. Production of mRNA/tRNA OR Transcription (o...

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Aqa GCSE CHEMISTRY Higher Tier Paper 1 (8462/1H) JUNE 2022 OFFICIAL Question Paper

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Aqa GCSE CHEMISTRY Higher Tier Paper 1 (8462/1H) JUNE 2022 OFFICIAL Question Paper Q1.0. This question is about metals and non-metals. Figure 1 shows an outline of part of the periodic table. Figure 1 0 1 . 1 Element Q is a dull solid with a melting point of 44 °C. Element Q does not conduct electricity. Which section of the periodic table in Figure 1 is most likely to contain element Q? [1 mark] Tick () one box. A B C D 0 1 . 2 Element R forms io...

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AS BIOLOGY AqA Paper 2 (7401/2) June 2022 OFFICIAL Question Paper

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AS BIOLOGY AqA Paper 2 (7401/2) June 2022 OFFICIAL Question Paper 1. What is a gene? 2. Describe how the production of messenger RNA (mRNA) in a eukaryote cell is different from the production of mRNA in a prokaryote cell. [2 marks] 3. Scientists produced a short, single-stranded, artificial nucleic acid, called PNA. The PNA binds to a small section of DNA. The scientists introduced PNA into cells and discovered that these cells produced less mRNA than cells that did not contain PNA. ...

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aQA AS BIOLOGY (7401/2) Paper 2 June 2022 CORRECT Mark scheme

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aQA AS BIOLOGY (7401/2) Paper 2 June 2022 CORRECT Mark scheme Q01.1 A sequence of DNA (nucleotide) bases that codes for a polypeptide; Q01.2 1. Pre-mRNA (only) produced in eukaryote (cell); 2. Splicing (only) occurs in eukaryote (cell); 3. Introns removed in eukaryote (cell) OR Introns not present in prokaryote (cell); Q01.3 1. PNA is complementary to DNA OR PNA forms base pairs with DNA; 2. Preventing/reducing RNA polymerase activity/binding OR Prevents RNA nucleotides bindi...

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Aqa AS BIOLOGY (7401/1) Paper 1 June 2022 CORRECT Mark scheme RATED A+

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Aqa AS BIOLOGY (7401/1) Paper 1 June 2022 CORRECT Mark scheme RATED A+ Q01.1 B: is hydrolysed in the ileum and a product of this hydrolysis is found in micelles; A: is formed by a condensation reaction between two α-glucose molecules; C: is formed by the action of DNA polymerase; B: gives a positive result in an emulsion test; Q01.2 1. Facilitated diffusion of amino acid (into cell when higher concentration in lumen); 2. Co-transport; 3. Sodium ions actively transported from cell to bl...

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aQa A-level BIOLOGY Paper 3 (7402/3) June 2022 Official Question Paper

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aQa A-level BIOLOGY Paper 3 (7402/3) June 2022 Official Question Paper Amino acids are used to make proteins. Table 1 shows the R groups of six different amino acids. Table 1 . Use Table 1 to identify the three different amino acids used to make the polypeptide shown in Figure 1. [2 marks] Figure 1 Left amino acid Middle amino acid Right amino acid Question 1 continues on the next page Turn over ► . Table 2 shows three statements and...

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