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Bihar Sec Teacher Science Test 104
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Bihar Sec Teacher Science Test 104

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  • Question 1/10
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    Which of the following is a harmful microorganism?
    Solutions
    Microorganism causes several diseases both in plants and animals. These microbes become carrier and spread the disease to the atmosphere. The micro-organisms which cause disease are called as pathogens. Many bacteria like Bacillus cereus, Clostridium perfringens and fungi like Yeast and Molds spoil cooked food, milk, fruits, vegetables etc.
  • Question 2/10
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    Consider the following:

    Assertion (A): Sexual mode of reproduction ensures variation in population.

    Reason (R): Two types of DNA are involved in sexual mode of reproduction.

    Choose the correct option from the following:

    Solutions

    It is necessary in a population to have variation in the species. Sexual mode of reproduction ensures this variation (as DNA of the new born will be copied from two different sets of DNA) without any error or malfunctioning of the cell as found when DNA is copied from a single cell (as in asexual mode of reproduction where offspring is produced by only single parent).

  • Question 3/10
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    Which of the following is not a synthetic fiber?
    Solutions

     Fibers obtained directly from nature are known as natural fibers. Example: cotton, silk, jute, etc. Fibers made artificially using chemicals are known as artificial fibers. Example: nylon, polyester, etc.

  • Question 4/10
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    What does pitch of sound represent?
    Solutions
    The correct option is ‘Both A and B’. Pitch of a sound interprets how sharp or how dull a sound is. It is driven by frequency, more is the frequency, higher is the pitch and less is the frequency, lower is the pitch.
  • Question 5/10
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    Identify the part of the plant cell that takes major part in the process of photosynthesis?
    Solutions
    Chloroplast contains a green pigment called chlorophyll which is responsible for absorbing the light at different wavelengths.
  • Question 6/10
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    Which of the following two planets in our solar system rotate from East to West. These planets are
    Solutions
    Venus and Uranus, two planets in our solar system rotate from East to West. Solar system has eight planets revolving in different orbits.
  • Question 7/10
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    Law of conservation of energy states that
    Solutions
    The law of conservation of energy states that “energy can neither be created nor be destroyed” but it can be changed from one form to another or transferred from one object to another. The total energy remains conserved.
  • Question 8/10
    1 / -0.25
    Which of the following method is a slow process of transmission of heat?
    Solutions

    The correct answer is option A, i.e., convection. The transfer of heat energy due to motion of molecules of the body is called convection of heat. Conduction and convection are slow processes, while radiation is a fast process.

  • Question 9/10
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    Where is the magnetic field of a magnet stronger?
    Solutions

    The correct option is ‘near the poles of a bar magnet’. The magnetic field of a magnet is more strong near the poles of a bar magnet because the magnetic lines are denser near the pole.

  • Question 10/10
    1 / -0.25
    Consider the following:

    i. The change of position of an object is defined as acceleration of the object.

    ii. The change in velocity per unit time of an object defines its motion.

    Which of the above statement is/are correct?

    Solutions

    The change of position of an object is defined as the motion of the object. The change in velocity per unit time of an object is defined as its acceleration.

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