161. Which of the following
environmental conditions are essential for optimum growth of Mucor on a piece
of bread?
A. Temperature of about 25°C
B. Temperature of about 5° C
C. Relative humidity of about 5%
D. Relative humidity of about 95%
E. A shady place
F. A brightly illuminated place Choose
the answer from the following options:
(1) B, C and F only
(2) A, D and E only
(3) A, C and E only
(4) B, D and E only
162. The thalloid body of a slime mould
(Myxomycetes) is known as
(1) mycelium
(2) plasmodium
(3) protonema
(4) fruiting body
163. Which of the following statements
regarding cilia is not correct?
(1) Cilia contain an outer ring of nine
doublet microtubules surrounding two single microtubules
(2) Cilia are hair-like cellular appendages
(3) The organized beating of cilia is
controlled by fluxes of Ca2+ across the membrane
(4) Microtubules of cilia are composed
of tubulin
164. Which antibiotic inhibits
interaction between RNA and mRNA during bacterial protein synthesis?
(1) Tetracycline
(2) Neomycin
(3) Erythromycin
(4) Streptomycin
165. There exists a close association
between the alga and the fungus within a lichen. The fungus
(1) fixes the atmospheric nitrogen for the
alga
(2) provides protection, anchorage and absorption for the alga
(3) releases oxygen for the alga
(4) provides food for the alga
166. Which one of the following is a
slime mould?
(1) Anabaena
(2) Physarum
(3) Rhizopus
(4) Thiobacillus
167. Ergot of rye is caused by a species
of
(1) claviceps
(2) uncimula
(3) phytophthora.
(4) ustilago
168. Which pair of the following belongs
to Basidiomycetes
(1) Morchella and mushrooms
(2) puffballs and Claviceps
(3) birds nest fungi and puffballs.
(4) peziza and stink borns
169. Which one of the following
statements about mycoplasma is wrong?
(1) They cause diseases in plants
(2) They are pleomorphic
(3) They are also called PPLO.
(4) They are sensitive to penicillin
170. The causative agent of mad-cow
disease is a
(1) Bacterium
(2) Prion
(3) Virus
(4) Worm
171. Which one is the wrong pairing for
the disease and its causal organism?
(1) Root-knot of vegetables -
Meloidogyne sp
(2) Black rust of wheat - Puccinia
graminis
(3) Late blight of potato - Alternaria solani
(4) Loose smut of wheat - Ustilago nuda
172. Thermococcus, Methanococcus and
Methanobacterium exemplify:
(1) Bacteria whose DNA is relaxed or
positively supercoiled but which have
a cytoskeleton as well as mitochondria
(2) Archaebacteria that contain protein homologous to eukaryotic core histones
(3) Bacteria that contain a cytoskeleton
and ribosomes
(4) Archaebacteria that lack any
histones resembling those found in eukaryotes but whose DNA is negatively
supercoiled
173. In the light of recent
classification of living organisms into three domains of life (bacteria,
archaea and eukarya), which one of the following statements is true about
archaea?
(1) Archaea completely differ from both
prokaryotes and eukaryotes
(2) Archaea resemble eukarya in all
respects
(3) Archaea completely differ from
prokaryotes.
(4) Archaea have some novel features that are absent in other
prokaryotes and eukaryotes
174. Bacterial leaf blight of rice is
caused by a species of
(1) Alternaria
(2) Xanthomonas
(3) Erwinia
(4) Pseudomonas
175. Which one of the following is
linked to the discovery of Bordeaux mixture as a popular fungicide?
(1) Loose smut of wheat
(2) Bacterial leaf blight of rice
(3) Black rust of wheat
(4) Downy mildew of grapes
176. Membrane-bound organelles are
absent in:
(1) Chlamydomonas
(2) Saccharomyces
(3) Plasmodium
(4) Streptococcus
177. Ringworm in humans is caused by:
(1) Nematodes
(2) Bacteria
(3) Viruses
(4) Fungi
178. Single-celled eukaryotes are
included in:
(1) Archaea
(2) Protista
(3) Monera
(4) Fungi
179. Mannitol is the stored food in:
(1) Gracillaria
(2) Porphyra
(3) Chara
(4) Fucus
180. Phylogenetic system of
classification is based on:
(1) floral characters
(2) morphological features
(3) evolutionary relationships
(4) chemical constituents
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