Biology_Today_-_October_2016

(lily) #1
I II III
(a) 6 PGAL 6 ATP 6 NADPH
(b) 12 PGAL 12 ATP 12 NADPH
(c) 12 PGAL 18 ATP 12 NADPH
(d) 6 PGAL 12 ATP 18 NADPH 2


  1. Read the following statements and select the correct
    option.


Statement A : The rate of transpiration is inversely
proportional to the relative humidity.


Statement B : DPD of atmospheric air is higher at low
relative humidity, so more of water vapours will diffuse out
of the leaf interior (having saturated air in its intercellular
spaces) compared to high relative humidity when DPD is
lower.
(a) Both statements A and B are correct and B is the
correct explanation of A.
(b) Both statements A and B are correct but statement B is
not the correct explanation of A.
(c) Statement A is incorrect while B is correct.
(d) Both statements A and B are incorrect.



  1. Match column I with column II and select the correct option
    from the codes given below.
    Column I Column II
    A. C 4 plants (i) Scotoactive
    B. Pigment system II (ii) Peroxisome
    C. CAM (iii) Evolution of molecular O 2
    D. Photorespiration (iv) Kranz anatomy
    (a) A-(iv), B-(iii), C-(i), D-(ii)
    (b) A-(iii), B-(iv), C-(ii), D-(i)
    (c) A-(i), B-(iv), C-(iii), D-(ii)
    (d) A-(iii), B-(ii), C-(iv), D-(i)

  2. Development of transpiration pull and continuous water
    column are the main features of
    (a) capillarity theory
    (b) vital force theory
    (c) root pressure theory
    (d) cohesion tension theory.

  3. Refer to the given graph and the statements following it.


Select the correct statements.
I. P has empirical formula C 55 H 70 O 6 N 4 Mg and is olive
green in colour.
II. Q absorbs more violet blue wavelength than red
wavelength of light.
III. R is hydrocarbon with a general formula of C 40 H 56.
IV. P is soluble in petroleum ether while Q is soluble in
methyl alcohol.
(a) I and II (b) I and III
(c) I, II and IV (d) II and IV


  1. The table given below shows the differences between
    apoplast and symplast pathway.
    Apoplast pathway Symplast pathway
    I. It consists of living parts
    of plant body.


It consist of non-living
parts of plant body.
II. It is a faster process. It is a slower process.
III. Metabolic state of root
directly affects the
pathway.

Metabolic state of root
does not affect this
pathway.
Which of the differences are incorrect regarding the two
pathways?
(a) I and II (b) I, II and III
(c) I and III (d) None of these


  1. Deficiency of which of the following elements causes marsh
    spot disease and whiptail disease, respectively?
    (a) Copper and Nickel
    (b) Zinc and Copper
    (c) Manganese and Molybdenum
    (d) Zinc and Nickel

  2. The empirical formula of chlorophyll a is
    (a) C 55 H 74 O 6 N 4 Mg (b) C 55 H 72 O 5 N 4 Mg
    (c) C 54 H 72 O 5 N 4 Mg (d) C 55 H 70 O 6 N 4 Mg.

  3. Hydroponics refers to growing plant in
    (a) water
    (b) soil culture
    (c) solution of mineral nutrients
    (d) tissue culture medium.

  4. Read the following sentences regarding girdling experiment
    and select the correct ones.
    I. Girdling experiment was performed to identify the
    tissues through which food is transported.
    II. This experiment explained that xylem is the tissue
    responsible for translocation of food.
    III. Nutrients get collected below the ring where the bark
    swells up.
    IV. This experiment cannot be carried out in monocots
    and dicots with bicollateral bundles as single strip of
    phloem is absent.
    (a) I, II, IV (b) II and III
    (c) II and IV (d) I and IV

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