A B C D
(a) Cytostome Photoreceptor Paramylum Myonemes
bodies
(b) Contractile Photoreceptor Paramylum Chloroplast
vacuole bodies
(c) Cytostome Stigma Paramylum Chloroplast
bodies
(d) Cytostome Stigma Myonemes Chloroplast- Which of the following statements regarding the Class
Phycomycetes is correct?
(a) These are found in aquatic habitats and on decaying
wood in moist and damp places or as obligate
parasites on plants.
(b) Mycelium in these fungi is aseptate and coenocytic.
(c) Asexual reproduction occurs by motile zoospores and
by non-motile aplanospores.
(d) All of these. - Study the given figure of structure of TMV (Tobacco Mosaic
Virus) and select the option that correctly identifies the
labellings A and B.
A B
(a) ssDNA Capsomeres
(b) dsDNA Capsomeres
(c) ssRNA Capsomeres
(d) dsRNA Tail fibres
- Select the incorrect statement regarding heterocyst.
(a) Heterocyst is a large sized thin walled cell
occurring only at terminal position in filamentous
cyanobacteria.
(b) The wall of heterocyst is impermeable to oxygen but
permeable to nitrogen.
(c) Heterocyst contains enzyme nitrogenase and is
specialised to perform nitrogen fixation.
(d) PS II is absent in heterocyst. - Which of the following statements is true about
viruses?
(a) All viruses known to man are obligate parasites.
(b) Some viruses have cellular structure and are
saprophytes.
(c) Viruses are filterable facultative parasites.
(d) Viruses are capable of performing metabolic activities
on their own.
14. Fungi can be distinguished from algae on the basis of
(a) cellulosic cell wall and heterotrophic nature
(b) chitinous cell wall and lacking chloroplast
(c) heterotrophic food habit and chloroplast presence
(d) none of the above.
15. Bryophytes comprise of
(a) dominant phase of gametophyte which produces
spores
(b) small sporophyte phase and generally parasitic on
gametophyte
(c) sporophyte is of longer duration
(d) dominant phase of sporophyte which is parasitic.
True or False - Classification based on evolutionary relationships of
organisms is called phylogenetic system of classification. - An inert virus can be crystallised and stored indefinitely.
- The viral genome gets integrated with host DNA in lytic
phase of reproductive cycle of virulent phages. - The outer membrane of bacterial cell has hydrophilic
channels of b-barrel proteins called porins. - Bacteria perform anoxygenic photosynthesis whereas
cyanobacteria perform oxygenic photosynthesis. - Zygote is the only diploid structure in organisms having life
cycle with gametic meiosis. - Euglenoids store their carbohydrates as paramylon,
scattered throughout the cytoplasm. - The brown colour of brown algae is due to the presence of
large amount of fucoxanthin. - In several cases, fungal hyphae get closely packed and
lose their individuality to form a compact tissue called
pseudoparenchyma. - Deuteromycetes are also called imperfect fungi because
they show autrotophic mode of nutrition.
Match The columns - Match Column I with Column II.
Column I Column II
A. Cytotaxonomy (i) Based on characteristics of
chemical constituents
B. Chemotaxonomy (ii) Systematic classification
based on evolutionary
history
C. Cladistics (iii) Divides organisms into
Plantae, Protista and
Animalia
D. Three-domain (iv) Based on comparative
system cytological studies
E. Three Kingdom (v) Divides cellular life forms
classification into archaea, bacteria and
eukarya