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NEET Test 118

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NEET Test 118
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Weekly Quiz Competition
  • Question 1
    4 / -1

    Restriction endonucleases are most widely used in recombinant DNA technology. They are obtained from

    Solution

    Restriction endonucleases are called as molecular scissors. It is because of the special feature of these enzymes to cut at desired sites of DNA in the technique of genetic engineering. These enzymes are found in bacteria and archaea and provide a defense mechanism against invading viruses.

    Hence, the correct option is (D).

     

  • Question 2
    4 / -1

    Which is the most abundant protein in the animal word?

    Solution

    Collagen is an insoluble fibrous protein found extensively in the connective tissue of skin, tendons, and bone. Collagen accounts for over 30% of the total 144 body proteins of mammals and it is the most abundant animal protein.

    Hence, the correct option is (C).

     

  • Question 3
    4 / -1

    The chemical substances produced by some microbes which can kill or retard the growth of other microbes are called:

    Solution

    Antibiotics are chemical substances secreted by certain microbes which inhibit the growth and development of other microbes. Most of them are produced by actinomycetes (especially the genus Streptomyces) and filamentous fungi. Some important antibiotics are tetracycline, chloramphenicol, streptomycin, etc.

    Hence, the correct option is (C).

     

  • Question 4
    4 / -1

    The focal lengths of the objective and the eyepiece of a compound microscope are 2.0 cm and 3.0 cm, respectively. The distance between the objective and the eyepiece is 15.0 cm. The final image formed by the eyepiece is at infinity. The two lenses are thin. The distance, in cm, of the object and the image produced by the objective, measure from the objective lens, are respectively.

    Solution

    for the image to form by objective is at infinity then the object distance must be = 2 cm

    and the final image is formed at focus of eyepiece i.e, = −3 cm

    distance of image from objective lens is 15 − 3 = 12 cm

    Hence, the correct option is (A).

     

  • Question 5
    4 / -1

    Transmission media used in low frequency band are

    Solution

    A transmission medium is something that can mediate the propagation of signals for the purposes of telecommunication. Signals are typically imposed on a wave of some kind suitable for the chosen medium. For example, data can modulate sound and a transmission medium for sounds may be air, but solids and liquids may also act as the transmission medium.

    Hence, the correct option is (D).

     

  • Question 6
    4 / -1

    Directions For Questions

    Direction: In the question below is given Statement A followed by Statement B. Then consider Statement A followed by Statement B together and decide which of them follows.

    ...view full instructions

    Statement A: Species is the basic unit of classification.

    Statement B: Two plants can be said to belong to the same species if they can reproduce freely with each other and form seeds.

    Solution

    Both the statements A and B are correct.

    Organisms which can freely interbreed and produce fertile offspring and have similar coded information or blueprint for making these organisms belong to the same species. In biology, a species is one of the basic units of biological classification and a taxonomic rank. It is often defined as a group of individuals that actually or potentially interbreed in nature.

    If two plants can reproduce freely with each other and form seeds, they are concluded to belong to same species. Plants belonging to same species have mostly every character common and will be able to reproduce freely with each other to produce new generations.

    Hence, the correct option is (A).

     

     

  • Question 7
    4 / -1

    Arrange the following in increasing order of their boiling points:

    I. Ethylmethylamine

    II. Propylamine

    III. Trimethylamine

    Solution

    The boiling point of a given compound is as follows:

    I. Ethylmethylamine - 33 to 34 °C

    II. Propylamine - 49 °C

    III. Trimethylamine - 2.9 °C

    Hence, the correct option is (B).

     

     

  • Question 8
    4 / -1

    By what factor must [H+] be increased to increase the reduction potential of a hydrogen electrode, having fixed pressure of hydrogen gas, by 0.0282 V?

    Solution

     

  • Question 9
    4 / -1

    Directions For Questions

    Consider the following statements with respect to respiration:

    (i) Glycolysis occurs in the cytoplasm of the cell.

    (ii) Aerobic respiration takes place within the mitochondria.

    (iii) The electron transport system is present in the outer mitochondrial membrane.

    (iv) C51 H98 O6 is the chemical formula of tripalmitin, a fatty acid.

    (v) Respiratory quotient 

    ...view full instructions

    Of the above statements:

    Solution

    Only (iii) and (v) options are incorrect because the Electron transport system occurs in the inner mitochondrial membrane and it is the final stage of aerobic respiration. Respiratory quotient is also known as RQ which is determined through this formula i.e. Volume of carbon dioxide produced to the volume of oxygen consumed.

    Hence, the correct option is (A).

     

  • Question 10
    4 / -1

    Electrons in a certain energy level (n = n1) can emit 3 spectral lines. When they are in another energy level, n = n2, they can emit 6 spectral lines. The orbital speeds of the electrons are in the ratio:

    Solution

     

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