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Biology - Cell the Unit of Life
Rating: 4.6 out of 5(4 ratings)
19 students

Biology - Cell the Unit of Life

Olympiad, Foundation, NEET, AIIMS, CBSE, iGCSE, GCSE, MCAT, AP-Biology & More
Created bystudi live
Last updated 1/2022
English

What you'll learn

  • What is a Cell?
  • Cell Theory
  • An Overview of Cell
  • Prokaryotic Cells
  • Eukaryotic Cells

Course content

1 section20 lectures3h 32m total length
  • Introduction9:16
  • An Overview of Cell11:09
  • Cell Size & Shape11:47

    Examine how cell size and shape vary across tissues, from ostrich eggs to nerve cells, and learn that cells are the structural and functional units of life.

  • Prokaryotic Cell19:06
  • Eukaryotic Cell10:06

    Explore the eukaryotic cell as the unit of life, distinguishing it from prokaryotes by membrane-bound organelles, a nucleus with chromosomes, and a developed cytoskeleton across plants, animals, and fungi.

  • Plant Cell6:40
  • Animal Cell10:10
  • Cell Organelle -Nucleus 19:23
  • Cell Organelle -Nucleus 210:12
  • Cell Organelle - Endoplasmic Reticulum10:02
  • Cell Organelle - Golgi Complex10:01
  • Cell Organelle - Vacuole7:07
  • Cell Organelle Mitochondria11:55
  • Cell Organelle Ribosomes7:24
  • Cell Organelle - Plastids12:41

    Plastids are semi-autonomous plant cell organelles with DNA and a double membrane. They impart color to leaves and fruits and store starch, proteins, or oils, while chloroplasts drive photosynthesis.

  • Cell Organelle - Chloroplast13:33

    Explore how chloroplasts use chlorophyll to capture sun energy, produce ATP through photosynthesis, and host grana stacks and stroma where enzymes synthesize carbohydrates and proteins.

  • Cell Organelle Cilia & Flagella10:07
  • Cell Envelope - Cell Membrane11:56

    Explore the cell membrane's role as the outermost, protective boundary. Learn about its selective permeability, lipid-protein-carbohydrate composition, the fluid mosaic model, and transport mechanisms including osmosis, passive and active transport.

  • Cell Envelope - Cell Wall10:06
  • Cell Organelle -Centrosomes & Centrioles9:55

    Explore centrosomes and centrioles, built from nine triplet fibrils of tubulin with hub and spokes, including satellite components. They organize cell division and form the base of cilia and flagella.

Requirements

  • Basic understanding of Biology

Description

SUMMARY

All organisms are made of cells or aggregates of cells. Cells vary in their shape, size and activities/functions. Based on the presence or absence of a membrane bound nucleus and other organelles, cells and hence organisms can be named as eukaryotic or prokaryotic.

A typical eukaryotic cell consists of a cell membrane, nucleus and cytoplasm. Plant cells have a cell wall outside the cell membrane. The plasma membrane is selectively permeable and facilitates transport of several molecules. The endomembrane system includes ER, golgi complex, lysosomes and vacuoles. All the cell organelles perform different but specific functions. Centrosome and centriole form the basal body of cilia and flagella that facilitate locomotion. In animal cells, centrioles also form spindle apparatus during cell division. Nucleus contains nucleoli and chromatin network. It not only controls the activities of organelles but also plays a major role in heredity.

Endoplasmic reticulum contains tubules or cisternae. They are of two types: rough and smooth. ER helps in the transport of substances, synthesis of proteins, lipoproteins and glycogen. The golgi body is a membranous organelle composed of flattened sacs. The secretions of cells are packed in them and transported from the cell. Lysosomes are single membrane structures containing enzymes for digestion of all types of macromolecules. Ribosomes are involved in protein synthesis. These occur freely in the cytoplasm or are associated with ER. Mitochondria help in oxidative phosphorylation and generation of adenosine triphosphate. They are bound by double membrane; the outer membrane is smooth and inner one folds into several cristae. Plastids are pigment containing organelles found in plant cells only. In plant cells, chloroplasts are responsible for trapping light energy essential for photosynthesis. The grana, in the plastid, is the site of light reactions and the stroma of dark reactions. The green coloured plastids are chloroplasts, which contain chlorophyll, whereas the other coloured plastids are chromoplasts, which may contain pigments like carotene and xanthophyll. The nucleus is enclosed by nuclear envelope, a double membrane structure with nuclear pores. The inner membrane encloses the nucleoplasm and the chromatin material. Thus, cell is the structural and functional unit of life.


Who this course is for:

  • Biology enthusiast
  • Beginners in Biology
  • NEET & MHT-CET aspirants
  • Those preparing for board and competitive exams State Board, CBSE, ICSE , IGCSE, MHT-CET & NEET