J257 - Study guides, Class notes & Summaries

2 © OCR 2023 1 (a) (i) Complete the table to compare cellular aerobic and anaerobic respiration in humans. Tick () the correct boxes in each row. [3] (ii) Which statement about respiration is correct? Tick () one box. Aerobic respiration produces more ATP than anaerobic respiration. Anaerobic respiration produces more ATP than aerobic respiration. Both aerobic and anaerobic respiration produce the same amount of ATP. Neither aerobic or anaerobic respiration produces ATP. [1] (b) H...

2 © OCR 2023 Tissue B is made of unspecialized cells Meristem Tissue A transports water from the plant’s roots 1 A scientist cuts a thin slice from a plant stem, as shown in Fig. 1.1. The slice of stem contains three different tissues. Fig. 1.1 B Plant stem Tissue C (a) Draw lines to connect the description of each tissue with its correct name. One has been done for you. Description Name [1] Capillary Tissue Tissue A Xylem Tissue C transports sugar from the plant’s ...

2 © OCR 2023 ring ring ring 1 Fig. 1.1 shows parts of the human nervous system. Fig. 1.1 Brain Structure B Muscle Spinal cord Structure A (a) Structure A allows us to sense the things we touch. What is the name of structure A? Put a around the correct option. CNS Effector Motor neuron Sensory neuron [1] (b) The muscle contracts to move the arm when it receives a nerve impulse from the brain. What type of structure is the muscle? Put a around the correct option. CNS Effector M...

3 © OCR 2023 Turn over "The larger the animal, the more chromosomes it has in each body cell." 1 (a) Write these structures in order of size. Cell Chromosome Gene Nucleotide Nucleus Smallest ..................................... ..................................... ..................................... ..................................... Largest ..................................... [4] (b) The table shows the number of chromosomes that different animals have in each body cell. ...

OCR Higher GCSE Biology B Twenty First Century Science J257_04: Depth in Biology (Higher Tier) mark scheme june 2024

OCR Higher GCSE Biology B Twenty First Century Science J257_03: Breadth in Biology (Higher Tier) question-paper june 2024

OCR GCSE BIOLOGY B PAPER 3 (J257/03) MARK SCHEME 2024 (GATEAWAY SCIENCE (Higher Tier)

OCR GCSE BIOLOGY B PAPER 2 (J257/02) MARK SCHEME 2024 (GATEAWAY SCIENCE (Foundation Tier)

OCR Foundation GCSE Biology B Twenty First Century Science J257_01: Breadth in Biology (Foundation Tier) question-paper june 2024

OCR GCSE BIOLOGY B PAPER 2 (J257/02) QURESTION PAPER 2024 (Foundation Tier)Twenty First Century Science)