Thursday, 13 April 2017

Mary - Science Revision


  1. What is a cell? How it is related to all organisms? The building blocks of life.
  2. Draw a typical cell and label it.
  3. Differentiate between plant cell and animal cell. Plant cells can be larger than animal cells. Although plant and animal cells have many similarities, plant cells have vacuoles, a cell wall and chloroplasts.
  4. Write the functions of cell wall, cell membrane, cytoplasm, mitochondria, vacuole, chromosomes and gene.
Cell Wall - Provides Strength for the plant.
Cell Membrane - Hold everything inside and controls what comes in and out.
Cytoplasm - Holds the cell organelles and contain nutrients and chemical.
Mitochondria - Holds out respiration to give the cell energy.
Vacuole - Helps keep the cell firm.
Chromosomes - A thread-like structure of nucleic acids and protein found in the nucleus of most living cells, carrying genetic information in the form of genes.
Gene - A unit of heredity which is transferred from a parent to offspring and is held to determine some characteristic of the offspring.
  1. Define Photosynthesis and explain the process. Give chemical and word equation. Photosynthesis is a process in which plants prepare their food in the presence of sunlight, by taking carbon dioxide from the environment and water from the Earth.

  1. Define Respiration and explain the process. Give Chemical and word Equation. Respiration is the process that the body uses to relate energy from digested food(glucose).

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