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14 mar 2022 · Get free biology worksheets, notes, quizzes, and slides that you can download and print in PDF, PNG, and Google Classroom formats.
• Different genes are active in different cell types, tissues and organs, producing the necessary specific proteins; some genes are ‘switched off’ and others are ‘switched on’ • Changes to the genetic code can mean that a particular protein is not produced properly, produced in the wrong amounts or
Revision notes on Chromosomes, Genes & Proteins for the Cambridge (CIE) IGCSE Biology syllabus, written by the Biology experts at Save My Exams.
Revision Pack Topic 1- Cell Biology Label the below diagram with the terms: DNA, gene, nucleus and chromosome. Explain the relationship between these terms and compare them in terms of size. Body cells in multicellular organisms divide to produce new cells as a series of stages called the cell cycle. What is mitosis?
21 sty 2020 · The nucleic acids consists of two major macromolecules, Deoxyribonucleic acid (DNA) and ribonucleic acid (RNA) that carry the genetic instructions for the development, functioning, growth and reproduction of all known organisms and viruses.
26 maj 2020 · Here are 20 interesting and fun facts about DNA: The genetic code in DNA consists of only four building blocks. These are the nucleotides adenine (A), guanine (G), thymine (T), and cytosine (C).
Cell Structure (1.1) Eukaryotes and Prokaryotes (1.1.1) All living things are made of cells, which can either be prokaryotic or eukaryotic. Animal and plant cells are eukaryotic. They have a: Cell membrane. Cytoplasm. Nucleus containing DNA . Bacterial cells are prokaryotic and are much smaller. They have a: . Cell wall. Cell membrane.
