GCSE EDEXCEL TRIPLE SCIENCE BIOLOGY PAPER 2

GCSE EDEXCEL TRIPLE SCIENCE BIOLOGY PAPER 2 2024 - QUESTION PAPER WITH CORRECT QUESTIONS AND ANSWERS WITH GRADED A+ What structures are present in an animal cell nucleus, cell membrane, mitochondria and ribosomes What structures are present in a plant cell nucleus, cell membrane, mitochondria, ribosomes, cell wall, chloroplasts and a permanent vacuole What structures are present in a bacteria cell chromosomal DNA, plasmid DNA, cell membrane, ribosomes and flagella What specialisations do sperm cells have acrosome - contains enzyme end to allow the cell to burrow into the egg haploid nucleus - other half is in egg cell mitochondria - to produce energy to allow the sperm cell to move/swim to the egg tail/flagellum - allows it to move/swim to the egg What specialisations do egg cells have Cytoplasm - contains extra nutrients to provide energy for the development of the embryo haploid nucleus - other half is in sperm cell Jelly layer - protect the egg as it moves along and to harden when a sperm enters to prevent any more from entering cell membrane - Hardens when a sperm cell enters to prevent any others from entering What specialisations do ciliated epithelial cells have cilia - hair like structures on top of the cells to waft things along such as an egg in the oviduct or mucus in the airway mitochondria - provide energy via respiration to move the cilia Triangle for Image, magnification and Actual - Image (whats seen in the microscope) - actual (the actual size of the object) - magnification (how much it is magnified by) I --- A|M How much can a light microscope magnify? x1500 what resolution can a light microscope see at 0.000,1mm How much can an electron microscope magnify? x2,000,000 what resolution can an electron microscope see at 0.000,000,2mm milli means 1,000 1x10³ micro means