Welcome back to Beyond’s Science Blog! This entry explores some of Beyond’s best YouTube Science Videos. Whether you’re revising Transport in Cells, Stem Cells, Mitosis and the Cell Cycle, Eukaryotes and Prokaryotes, or Culturing Microorganisms, we’ve got you covered.
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Why not check out our Beyond Science: Cell Biology – Transport In Cells Video
Understand Transport in Cells in 6 minutes with Sarah from Beyond Science. By the end of this video lesson you will be able to describe how substances move into and out of cells by diffusion, osmosis and active transport. Sarah walks us through how to compare these three processes.
Sarah elaborates on how all organisms carry out processes such as respiration, which are essential to keep them alive. She shows us how these life processes require chemical reactions to take place within the cells of the organism and how the reactant of these chemical reactions needs to be able to move into the cells. She explains that the product of the chemical reaction needs to be able to move out of the cells.
From here, we talk about the three ways substances move into and out of the cell: diffusion, osmosis and active transport. Sarah explains how diffusion is a passive process meaning no energy is required for it to happen. She explains that the rate at which a substance diffuses can be affected by three factors: temperature, concentration gradient and surface area.
This video also looks at osmosis and active transport in detail. Exploring how osmosis is the diffusion of water from a dilute solution to a concentrated solution through a partially permeable membrane. It covers how active transport is the movement of substance from a more dilute solution to a concentrated solution (against a concentration gradient) and how this requires energy from respiration.
Need to revise Stem Cells? Check out our Beyond Science: Cell Biology – Stem Cells Video.
By the end of this lesson you will be able to describe the function of stem cells in embryos, in adult animals and in the meristems in plants. You’ll be able to discuss the benefits and risks of using stem cells to treat conditions such as diabetes and paralysis.
Sarah explains that a stem cell is a cell that hasn’t been differentiated in any way. She mentions stem cells’ ability to replicate and make more stem cells. Describing how they can differentiate and become different types of cell such as: a red blood cell, a root hair cell and a nerve cell.
From here, Sarah explains how in animals, cells differentiate early in the organism’s life cycle, this means that animals like humans have many stem cells during their early development as embryos. As the embryo develops stem cells differentiate to form any of the different cells that the body will need as it grows.
Sarah also describes how some adult stem cells are found in bone marrow and have the ability to differentiate, but are less varied. She explains that stem cells can be used to treat some medical conditions, exploring the benefits and problems of adult stem cell therapies.
Our Beyond Science: Cell Biology – Mitosis and the Cell Cycle Video has everything you need to know to get to grips with Mitosis.
By the end of this Mitosis and the Cell Cycle lesson you will be able to describe the stages of the cell cycle including mitosis and explain why mitosis is important for organisms.
Sarah walks us through how in eukaryotes, the nucleus of the cell contains chromosomes made of coiled DNA molecules. The video explains how each chromosome contains many genes.
Sarah also explains the cycle of a cell and how new cells can be made to allow organisms to grow and replace damaged cells.
Need to brush up on your knowledge of Eukaryotes and Prokaryotes? Then this video is for you: Beyond Science: Cell Biology – Eukaryotes and Prokaryotes
Understand Eukaryotes and Prokaryotes in just over 6 minutes with Sarah from Beyond Science. By the end of this Eukaryotes and Prokaryotes lesson you will be able to talk about the size and scale of cells and be able to describe the differences between a prokaryotic cell and a eukaryotic cell. Sarah walks us through how all living things (organisms) are made of cells i.e. animal cells, bacterial cells and plant cells.
The video explains how unicellular organisms are made of only one cell (such as a bacterial cell), while other organisms, like animals and plants, are multicellular (made of many cells).
We talk through how not all cells are the same; that they can be different sizes and contains different subcellular structures. Sarah also takes a closer look at the inside of Eukaryotes and Prokaryotes. Prokaryotes include bacterial cells, are very small, have simple structures, and have no nucleus. Whereas, Eukaryotes include animals and plants cells but their DNA is within a nucleus and are large complex structures.
Beyond’s Science Video on Cell Biology – Culturing Microorganisms will ensure you stay ahead of the game!
By the end of this video lesson you will be able to describe how bacteria reproduce and describe how to prepare an uncontaminated culture. Sarah walks us through how bacteria reproduce very quickly by binary fission and make a copy of their genetic material.
Before elaborating on culturing microorganisms, Sarah shows us how the Mean Division Time is calculated. The optimum rate for bacteria growth is explored along with the required specific conditions, for example: warmth, nutrients and moisture.
From here, we talk through how in a laboratory microorganisms are either grown in a nutrient broth or agar jelly. Sarah explains how in the laboratory it is important to avoid contamination when growing microbes. An aseptic technique is used to ensure this. The steps for this technique are explained in detail. The results of the reproducing microorganisms are then shown.
Found our YouTube Science Videos useful? Don’t forget you can read our other Science revision blogs here and don’t forget to subscribe to Beyond for access to thousands of secondary teaching resources. You can sign up for a free account here and take a look around at our free resources before you subscribe too. Happy revising from the Beyond Science Team.