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NEET Test 196

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NEET Test 196
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Weekly Quiz Competition
  • Question 1
    4 / -1

    Solution

     

  • Question 2
    4 / -1

    Which of the following pairs is correctly matched?

    Solution

    The effects of the thyroid come from two iodine containing-hormones, triiodothyronine (T3), and thyroxine (T4). Iodine (atomic number, 53; standard atomic mass, 126.9) is a rate-limiting element for the synthesis of thyroid hormones.

     

  • Question 3
    4 / -1

    Two radioactive nuclei P and Q, in a given sample decay into a stable nucleus R. At time t = 0, the number of P species are 4No and that of Q are No. Half-life of P (for conversion to R) is 1min whereas that of Q is 2min. Initially there are no nuclei of R present in the sample. When number of nuclei of P and Q are equal, the number of nuclei of R present in the sample would be:

    Solution

     

  • Question 4
    4 / -1

    Using mass (M), length (L), time (T) and current (A) as fundamental quantities, the dimensions of permeability are

    Solution

    Talking about its dimensional formula first we should know that it is equal to the ratio of the intensity of magnetic field ( simply magnetic field ) to the magnetizing field ( i.e. the to which a magnetic field can magnetize a material ). And a unit of magnetizing field is Ampere per meter.

     

  • Question 5
    4 / -1

    The acceleration due to gravity at height h above the earth if h << R (Radius of earth) is given by

    Solution

     

  • Question 6
    4 / -1

    Which among the following reagents can be used for the test of carbonyl group in laboratory?

    Solution

    2,4−DNPH is used for the test of carbonyl group in laboratory as a red coloured precipitate is formed:

     

  • Question 7
    4 / -1

    Which statements about carbohydrates are correct?

    I. Inulin is a polymer of sucrose.

    II. Glucose is a respiratory substrate and is also called fruit sugar.

    III. Starch forms helical secondary structures in which it can hold I2 molecules.

    IV. The variant of cellulose in animals is glycogen.

    Solution

    The biomolecules with carbon, oxygen, and hydrogen atoms are known as carbohydrates. Depending on the composition, they can either be monosaccharides, disaccharides, or polysaccharides. Sucrose is a disaccharide and can be broken down to glucose and fructose. Inuline is a polymer of fructose. Glucose and fructose are monosaccharides, out of which fructose is also known as fruit sugar. 

    Starch forms helical secondary structures in which it can hold 1, molecules. The starch I2 is blue in colour. Cellulose is a homopolymer. Starch is a variant of this but present as a storehouse of energy in plant tissues. Animals have another variant called glycogen.

     

  • Question 8
    4 / -1

    Inulin found in plant cell is a:

    Solution

    Plant hormones, also known as phytohormones, are chemicals that regulate plant growth. Plant hormones are signaling molecules and are produced in plants in very small quantities. Hormones regulate cellular processes in locally targeted cells and when they reach other places in the plant, they regulate cellular processes. Inulin is an unusual polysaccharide and polymer of fructose. It is used as a fructose, particularly in roots and tubers of the family Compositae (e.g. Dahlia tubers).

     

  • Question 9
    4 / -1

    The magnetic flux in a coil changes from 20 × 10−2 Weber to 12 × 10−2 Weber in 0.02 s.  Find the value of induced emf in the coil.

    Solution

    Given:

    Initial magnetic flux (ϕ1) = 20 × 10−2 Weber

    Final magnetic flux (ϕ2)=12 × 10−2 Weber

    Change in time Δt = 0.02 s

    This change can be produced by changing the magnetic field strength, moving the coil into or out of the magnetic field, moving a magnet toward or away from the coil, rotating the coil relative to the magnet, etc.

    The value of induced emf in the coil is given by:

     

  • Question 10
    4 / -1

    Match the following:

            List I

                       List II

    a. Homologous organs 1. They are those organs that have different basic structures but have a similar appearance and perform similar functions
    b. Fossils 2. They are those organs that have the same basic structure but different functions
    c. Analogous organs 3. They are the remains or impressions of dead animals or plants that lived in remote past
    Solution
            List I

                       List II

    a. Homologous organs 1. They are those organs that have the same basic structure but different functions
    b. Fossils 2.  They are the remains or impressions of dead animals or plants that lived in remote past
    c. Analogous organs 3. They are those organs that have different basic structures but have a similar appearance and perform similar functions

    Hence, the correct option is (A)

     

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