HomeLearn Fast select Course
Change UnitChange SubjectLast Menu
NEET-XII-Biology

Previous Year Paper year:2022

with Solutions - page 4
 
  • Qstn #45
    Which of the following is a correct statement?
    (A)Mycoplasma have DNA, Ribosome and cell wall

    (B)Cyanobacteria are a group of autotrophic organisms classified under Kingdom Monera.
    (C)Bacteria are exclusively heterotrophic organisms.
    (D)Slime moulds are saprophytic organisms classified under Kingdom Monera.
    digAnsr:   B
    :
  • Qstn #46
    The recombination frequency between the genes a `` \, \& \,c `` is `` 5 \%, b \,\&\, c `` is `` 15 \%, b \,\&\, d `` is `` 9 \%, a \,\&\, b `` is `` 20 \%, c\, \&\, d `` is `` 24 \% `` and `` a \,\&\, d `` is `` 29 \% `` . What will be the sequence of these genes on a linear chromosome?

    (A)a, c, b, d
    (B)a, d, b, c
    (C)d, b, a, c
    (D)a, b, c, d
    digAnsr:   A
    :
  • Qstn #47
    Match List - I with List - II with respect to methods of Contraception and their respective actions.
    List I List II
    a Diaphragms i Inhibit ovulation and Implantation
    b Contraceptive Pills ii Increase phagocytosis of sperm within Uterus
    c Intra Uterine Devices iii Absence of Menstrual cycle Devices and ovulation following parturition
    d Lactational Amenorrhea iv They cover the cervix blocking the entry of sperms
    Choose the correct answer from the options given below:
    (A)
    (a) - (iii),
    (b) - (ii),
    (c) - (i),
    (d) - (iv)
    (B)
    (a) - (iv),
    (b) - (iii),
    (c) - (i),
    (d) - (ii)

    (C)
    (a) - (iv),
    (b) - (i),
    (c) - (ii),
    (d) - (iii)
    (D)
    (a) - (ii),
    (b) - (iv),
    (c) - (i),
    (d) - (iii)
    digAnsr:   C
    :
  • Qstn #48
    Match List - I with List - II.
    List I List II
    a Bronchioles i Dense Regular Connective Tissue
    b Goblet cell ii Loose Connective Tissue
    c Tendons iii Glandular Tissue
    d Adipose Tissue iv Ciliated Epithelium
    Choose the correct answer from the options given below:
    (A)
    (a) - (iii),
    (b) - (iv),
    (c) - (ii),
    (d) - (i)

    (B)
    (a) - (iv),
    (b) - (iii),
    (c) - (i),
    (d) - (ii)
    (C)
    (a) - (i),
    (b) - (ii),
    (c) - (iii),
    (d) - (iv)
    (D)
    (a) - (ii),
    (b) - (i),
    (c) - (iv),
    (d) - (iii)
    digAnsr:   B
    :
  • Qstn #49
    If a colour blind female marries a man whose mother was also colour blind, what are the chances of her progeny having colour blindness ?
    (A) `` 100 \% ``
    (B) `` 25 \% ``

    (C) `` 50 \% ``
    (D) `` 75 \% ``
    Solution">
    digAnsr:   C
    Ans : Color blindness is specifically linked to defects within the x chromosome. For color blindness to be present all x chromosomes within an individual have to be affected, and since men only have one X chromosome and women have 2, the chances of men being impacted are exponentially higher.
    However, in this case, it would seem that due to the genetic inheritance of the mother the chances of their child being color blind would be approximately 50% because each parent is a carrier. However, the chances of inheriting a colorblind X chromosome would be twice as likely for a female child. Below is how I broke this scenario down, where the lower case x represents the affected X chromosome.
    F: xY M: xX
    xx—-Female child (color blind)
    xX—Female Child (not color blind but a carrier)
    Yx—Male Child (Color Blind)
    YX—Male Child (not color blind and not a carrier)
    So, the correct answer is '50%'.
  • Qstn #50
    Given below are two statements : Statement I : In a scrubber the exhaust from the thermal plant is passed through the electric wires to charge the dust particles. Statement II: Particulate matter (PM 2.5) can not be removed by scrubber but can be removed by an electrostatic precipitator. In the light of the above statements, choose the most appropriate answer from the options given below:
    (A)Statement I is incorrect but Statement II is correct
    (B)Both Statement I and Statement II are correct
    (C)Both Statement I and Statement II are incorrect

    (D)Statement I is correct but Statement II is incorrect
    digAnsr:   D
    :
next page