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Biology Test - 36

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Biology Test - 36
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  • Question 1
    1 / -0

    The scientific name of mango is written as Mangifera indica L. Pickup the correct statement about the significance of the letter 'L'.

    Solution

    The scientific name of mango is written as Mangifera indica L. Letter 'L' signifies the taxonomist, Linnaeus.

    Carl Linnaeus was a Swedish botanist, physician and zoologist, who laid the foundations for the modern biological naming scheme of biological nomenclature. He is known as the father of taxonomy and is also considered one of the fathers of modern ecology. In botany, the author abbreviation is used to indicate Linnaeus as the authority for the species name. In older publications, sometimes the abbreviation "Linn" is found.

  • Question 2
    1 / -0

    Which of the following is not a characteristic of birds?

    Solution

    Birds are not cold-blooded. They are warm-blooded , as they can maintain their body temperature.

    Birds possess lungs. The bones of birds are hollow. Hollow bones make them light-weighted (required for flight). Birds lay amniotic eggs (embryo develops inside an amnion).

  • Question 3
    1 / -0

    Which kind of therapy is given to a patient suffering with Adenosine Deaminase (ADA) deficiency?

    Solution

    Gene therapy is given to a patient suffering with adenosine deaminase (ADA) deficiency.

    Gene therapy is the process of introduction of DNA into an organism e.g. human beings in order to treat a disease. It is used to replace a missing gene product or to correct mutant alleles. ADA is an autosomal-recessive inherited disorder that occurs due to defective adenosine deaminase (ADA) enzyme.

  • Question 4
    1 / -0

    Match the following:

    Diseases Causing pathogen
    A. Gonorrhoea 1. Treponema pallidum
    B. Syphilis 2. Human Papilloma virus
    C. Genital warts 3. Neisseria gonorrhoeae
    Solution

    A. Gonorrhoea - Gonorrhoea is a sexually transmitted infection (STI) caused by bacteria called Neisseria gonorrhoeae or gonococcus.

    B. Syphilis - Syphilis is a chronic bacterial infection that can be transmitted through sexual contact. Syphilis is caused by a type of bacteria known as Treponema pallidum.

    C. Genital warts - Genital warts are a type of sexually transmitted disease (STD). The disease causes warts (small bumps or growth ) to form in and around the genitals and rectum. it is caused by Human Papilloma virus.

  • Question 5
    1 / -0

    The salient features of genetic code are :

    (A) The code is palindromic

    (B) UGA act as initiator codon

    (C) The code is unambiguous and specific

    (D) The code is nearly universal

    Choose the most appropriate answer from the options given below :

    Solution

    The genetic code is unambiguous and specific, meaning each codon specifies only one amino acid. Also, the genetic code is nearly universal as the same codons specify the same amino acids in all organisms with a few minor exceptions. The code is not palindromic, and UGA does not act as an initiator codon; it is a stop codon in most organisms.

  • Question 6
    1 / -0

    Colchicine arrests which of the following stage of Cell Division?

    Solution

    Colchicine arrests at the metaphase stage of cell division.

    Colchicine is an alkaloid drug that is considered to be a cellular poison. It stops the cell division and arrests the cells at the metaphase stage. It generally works by destructing the spindle fibre formation which results in the separation of the chromosome. Thus chromosome cannot separate during the anaphase and they are stuck at the metaphase stage.

  • Question 7
    1 / -0

    What are the respiratory organs of Molluscs?

    Solution

    Molluscs are animals with soft bodies and covered with the hard calcareous shell as the exoskeleton. They are mostly aquatic. This shell is secreted by a thin sheet of tissue called a mantle, which encloses the internal organs. Within the mantle cavity hang the gills which are used to exchange oxygen and carbon dioxide in respiration. In certain bivalves, gills are used for respiration as well as for filter feeding. The pulmonary sac or cavity is an organ of aerial respiration and is found in land molluscs.

  • Question 8
    1 / -0

    Select the correct sequence for transport of sperm cells in male reproductive system.

    Solution

    The correct sequence for transport of spermcells in male reproductive system is
    Seminiferous tubules → Rete testis → Vasa efferentia → Epididymis → Vas deferens →Ejaculatory duct → Urethra → Urethralmeatus

  • Question 9
    1 / -0

    Which of the following does not affect the rate of diffusion?

    Solution

    Diffusion is a passive process and it doesn’t require energy in the form of ATP. Temperature, Pressure and Concentration gradient do affect the rate of diffusion to varying degrees.

  • Question 10
    1 / -0

    Nicotiana is a:

    Solution

    Nicotiana is a Genus.

    Nicotiana tabacum is the scientific name for the tobacco plant. The scientific name of any organism on the basis of binomial nomenclature consists of two epithets in which the first epithet is the genus name and the second epithet is the species name.

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