http://avxhome.se/blogs/Torries

27. Match Column I with Column II. (There can be more than
    one match for items in Column I)
    Column I Column II
    A. Glycocalyx (i) Attachment to a surface
    B. Bacteria causing (ii) Thermoplasma
    disease in plants
    C. Bacteria having (iii) Cleaning agents in tooth
    dual ability to paste
    tolerate high tem-
    perature as well as
    acidity
    D. Diatomite (iv) Added to paints for
    enhancing night visibility
    E. Alginic acid (v) Thermoproteus
    (vi) Xanthomonas citri
    (vii) Macrocystis
    (viii) Protection from toxic
    chemicals and drugs
    (ix) Agrobacterium tumefaciens
    (x) Sargassum

passage Based Questions

28.(A) Complete the given passage with appropriate words or
phrases.

Algae do not occur generally in dry (i) habitats. They

usually possess (ii) and are (iii) in nutrition. Their

cell walls are made up of true (iv). Food reserve in algae

is (v) or related polysaccharide and (vi). (vii)

spores and gametes are quite common in the members

of this group.

(B) Read the given passage and correct the errors, wherever
present.

Sclerotia and rhizomorphs are the means of sexual
reproduction in fungi. Rhizomorphs are perennating bodies
made up of compact masses of hyphae whereas sclerotia
are rope like twisted subterranean masses of hyphae.
Vegetative reproduction in fungi occurs through spores.
The sexually produced spores are called mitospores,e.g.,
basidiospores, conidia, etc. Asexually produced spores are
called meiospores, e.g., ascospores, chlamydospores etc.

Assertion & reason

In each of the following questions, a statement of Assertion

(A) is given and a corresponding statement of Reason (R)
is given just below it. Of the statements, mark the correct
answer as :
(a) if both A and R are true and R is the correct explanation of

A

(b) if both A and R are true but R is not the correct explanation

of A

(c) if A is true but R is false

(d) if both A and R are false.

29. Assertion : Mycoplasma are pathogenic in animals and
    plants.
    Reason : Mycoplasma lack cell wall and can survive
    without oxygen.


30. Assertion : Viroids are small infectious RNA particles
    which are devoid of protein coat.
    Reason : Viroids contain more than 900 nucleotides
    and do not contain any genes.


31. Assertion : Hopanoids are pentacyclic sterols found in
    plasma membrane of some bacteria.
    Reason : Hopanoids stabilise the plasma membrane.


32. Assertion : Halobacterium is able to live under high
    salt conditions like salt beds, salt marshes, etc.
    Reason : Halobacterium contains red carotenoid pigment
    in its cell membranes which protects it against harmful
    solar radiations and also lacks sap vacuoles hence can
    avoid plasmolysis.


33. Assertion : Euglenoids pile up at the bottom of water
    reservoirs and from big heaps called diatomite.
    Reason : The reserve food material of euglenoids is in
    the form of volutin globules.


34. Assertion : In many Basidiomycetes the central septal
    pore possesses a barrel shaped inflation known as
    dolipore septum.
    Reason : Septal pores allow movement of substances
    between adjacent cells.


35. Assertion : Dikaryotic cells in fungi represent intervening
    stage between plasmogamy and karyogamy and contain
    two haploid nuclei.
    Reason : Fungal cellulose or chitin is basically made
    up of acetyl glucosamine.


36. Assertion : In lichens, mycobiont and phycobiont are
    symbiotically associated in which algae is predominant
    and fungi is a subordinate partner.
    Reason : The fungus provides food and alga protects
    the fungus from unfavourable conditions.


37. Assertion : Individuals of sporozoa lack locomotory
    organs.
    Reason : All sporozoans are parasites.


38. Assertion : Kingdom Protista includes all eukaryotic
    organisms.
    Reason : Membrane bound organelles and an organised
    nucleus is absent in Protista.