As level biology a qp - Study guides, Class notes & Summaries

Molecular Biology: Biology Paper 2 Past Paper Questions: A-Level Edexcel June 2023 QP - Paper 2 Edexcel (A) Biology AS-level Describe what happens in the cell during the telophase stage of mitosis. - ANSWER-• spindle fibres break down (1) • chromosomes {decondense / uncoil} (1) • nucleoli form (1) • nuclear {membrane / envelope } forms (1) • two separate { nuclei / sets of chromosomes }(1) Describe the importance of nitrate ions to plants. - ANSWER-•...

ocr AS Level Biology A H020-01 QUESTION PAPER May2023.

ocr AS Level Biology A H020-02 QUESTION PAPER May2023.

This is a complete and an all-inclusive guide to AQA A-LEVEL BIOLOGY PAPER 3 2020 QP. Guppies are small fish. Female guppies are dull in colour. Male guppies can be bright or dull in colour. Scientists investigated the effect of female brain size on choosing a mate. They used laboratory-bred female guppies with large brains and with small brains. They set up a fish tank as shown in Figure 1. They observed each female for 10 minutes and recorded which male they were attracted towards. They...

0 1 Figure 1 shows part of a DNA molecule 0 1 . 1 How many nucleotides are shown in Figure 1? [1 mark] 0 1 . 2 Name the type of bond labelled X in Figure 1 0 1 . 3 The enzymes DNA helicase and DNA polymerase are involved in DNA replication. Describe the function of each of these enzymes. [2 marks] DNA helicase DNA polymerase 0 1 . 4 Adenosine triphosphate (ATP) is a nucleotide derivative. Contrast the structures of ATP and a nucleotide found in DNA to give two differences.

AQA A Level Biology Paper 3 2020 QP. Guppies are small fish. Female guppies are dull in colour. Male guppies can be bright or dull in colour. Scientists investigated the effect of female brain size on choosing a mate. They used laboratory-bred female guppies with large brains and with small brains. They set up a fish tank as shown in Figure 1. Figure 1 They observed each female for 10 minutes and recorded which male they were attracted towards. They repeated this with 45 large-brained fem...

ocr AS Level Biology A (H020/02) June2022 Question Paper