Biology: Cell Structure and DNA
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Questions and Answers

What is the main function of the nucleus in a cell?

  • To store food and energy
  • To synthesize proteins
  • To protect the cell from external damage
  • To control all activities of the cell (correct)

    • What is the full form of DNA?

  • Deoxyribonucleic Acid (correct)
  • Dioxyribonucleic Acid
  • Deoxyribonucleic Acids
  • Deoxyribonucleic

    • What is the term for the transmission of characteristics from parents to offspring?

  • Inheritance
  • Genetics
  • Heredity (correct)
  • Species

    • What is the study of structure and behavior of genes known as?

    <p>Genetics</p> Signup and view all the answers

    What happens to the number of chromosomes when gametes are formed in animals?

    <p>It is reduced to half</p> Signup and view all the answers

    What is the function of genes in a cell?

    <p>To act as instructions to make proteins</p> Signup and view all the answers

    Where are genes located in a cell?

    <p>On the chromosomes</p> Signup and view all the answers

    Why is DNA called hereditary material?

    <p>Because it contains a complete set of instructions for developing a new cell or organism</p> Signup and view all the answers

    What is the significance of chromosomes having the same number for a species?

    <p>It helps to maintain the characteristics of the species</p> Signup and view all the answers

    What are chromosomes composed of?

    <p>A combination of proteins and DNA</p> Signup and view all the answers

    Study Notes

    Cell Structure

    • Nucleus is the control center of the cell, responsible for all cellular activities.

    Chromosomes

    • Chromosomes are found in the nucleus of the cell and consist of proteins and DNA.
    • The number of chromosomes in the cells of a species remains the same, but is reduced to half in gametes (sperms or eggs) or spores.

    DNA

    • DNA stands for Deoxyribonucleic Acid.
    • DNA is the hereditary material that contains the complete set of instructions for developing a new cell or organism.

    Heredity and Genetics

    • Heredity refers to the transmission of characteristics from parents to offspring.
    • Genetics is the science of heredity, studying the structure and behavior of genes.

    Cell Structure and Function

    • The nucleus is the control center of the cell, responsible for governing all cellular activities.
    • Chromosomes are found in the nucleus and consist of proteins and DNA.

    DNA and Chromosomes

    • DNA (Deoxyribonucleic Acid) is the hereditary material containing a complete set of instructions for developing a new cell or organism.
    • Chromosomes contain genes, which act as instructions to make proteins.
    • The number of chromosomes in cells of the same species remains constant.
    • However, during gamete formation (sperm or egg cells in animals, spores in plants), the number of chromosomes is halved.

    Heredity and Genetics

    • Heredity refers to the transmission of characteristics from parents to offspring.
    • Genetics is the science that studies heredity, focusing on the structure and behavior of genes.
    • Genes are the basic physical and functional units of heredity, located on chromosomes.

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    Description

    This quiz covers the basics of cell structure, including the nucleus and chromosomes, and the role of DNA in heredity.

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