- Which of the following are found in extreme
saline conditions?
(a) Bubacteria (b) Cyanobacteria
(c) Mycobacteria (a) Archaebacteria
( 2017) - Viroids differ from viruses in having.
(a) DNA molecules without protein coat
(b) RNA molecules with protein coat
(c) RNA molecules without protein coat
(d) DNA molecules with protein coat
(2017) - Which among the following, are the smallest
living cells, known without a definite cel! wall
pathogenic to plants as well as animals and
can survive without oxygen? (a)Pseudomonas (b) Mycoplasma(c) Nostoc (d) Bacillus( 2017)
- Which of the following components provides
sticky character to the bacterial cell?
(a) Nuclear membrane
(b) Plasma membrane
(c) Glycocalyx
(d) Cell walt
( 2017) - DNA replication in bacteria occurs
(a) within nucleolus
(b) prior to fission
(c) just before transcription
(d) during s phase. ( 2017) - Which one of the following is wrong for fungi?
(a) They are eukaryotic.
(b) All fungi possess a purely cellulosic cell wall
(c) They are heterotrophic.
(d) They are both unicellular and multicellular
( 2016) - Chrysophytes, Euglenoids, Dinoflagellates and Slime moulds are included in the Kingdom (a) Fungi (b) Animalia (c) Monera (d) Protista (2016)
- Which one is a wrong statement? (a) Haploid endosperm is typical feature of Gymnosperms. (b) Brown algae have chlorophyll a and c and facoxanthin (c) Archegonia are found in Bryophyta,Pteridophyta and Gymnosperms (d) Mucor has biflagellate zoospores.
- Methanogens belong to
(a) eubacteria (b) archaebacteria
(c) dinoflagellates (d) slime moulds.
(2016) - Select the wrong statement,
(@) The walls of diatoms are easily
destructible.
(b) “Diatomaceous earth’ is formed by the cell
‘walls of diatoms.
(c), Diatoms are chief producers in the oceans.
(d) Diatoms are microscopic and float passively in wate, (2016) - ‘The primitive prokaryotes responsible for the production of biogas from the dung of ruminant animals, include the
(a) methanogens
(b) eubacteria
(c) halophiles
(d) thermoacidophiles.. (2016) - Which one of the following statements is wrong?
(a) Eubacteria are also called false bacteria
(b) Phycomycetes are also called algal fungi.
(c) Cyanobacteria are also called blue-green
algae.
(d) Golden algae are also called desmids.
(2016) - Which of the following statements is wrong for viroids?
(a) They cause infections,
(b) Their RNA is of high molecular weight.
(c) They lack a protein coat,
(d) They are smaller than viruses.
( 2016) - One of the major components of cell wall of most fungi is
(a) cellulose (b) hemicellulose
(c) chitin (d) peptidoglycan.( 2016) - Choose the wrong statement, (a) Morels and truffles are poisonous mushrooms, (b)Yeast is unicellular and useful in fermentation. (c) Penicillium is rwulticellular and produces antibiotics. (d) Neurospora is used in the study of bio-‘chemical genetics.(2013)
- Cell wall is absent in (a) Mycoplasma (b) Nosioe(c) Aspergillus (d) Funaria
- .True nucleus is absent in (a) Vaucheria (b) Fodor (c) Anabaena (d) Mucor (2015 )
- Archaebacteria differ from eubacteria in
(a) cell membrane structure
(b) mode of nutrition
(c) cell shape
(d) mode of reproduction.
17.Which structures perform the function of mitochondria in bacteria? (a) Nucleoid (b) Ribosomes
(c) Cell wall (d) Mesosomes
(2014)
18. The motile bacteria are able to move by
(a) fimbriae (b) Flagella
(c) cilia (d) pili
19.Anoxygenie photosynthesis is characteristic of (a) Rhodospiritium (b) Spirogyra
(c) Chlamydomonas (d) Ulva.
20.Which of the following are likely to be present in deep sea water?
(a) Blue-green aleae (b) Saprophytie fungi
(c) Archacbacteria (d) Eubacteria
(2013)
21.Pigment containing membranous extensions in some cyanobacteria are (a) pneumatophores (b) chromatophores(c) heterocysts(d) basal bodies.
( 2013)
- Why is a capsule advantageous to a bacterium?
a) It protects the bacterium ftom desiccation.
(b) It provides means of locomotion.
(c) Itallows bacterium to “hide” from host’s immune system.
(d) It allows the bacterium to attach to the surface.
(2013)
23.A free living nitrogen-fixing cyanobacterium which can also form symbiotic association with the water fern Azolla is (a) Tolypothrix (b) Chlorella(c) Nostoc (d) Anabaena.
(2004)
24.During replication ofa bacterial chromosome DNA synthesis starts from a replication origin site and
- (a) RNA primers are involved
- (b) is facilitated by telomerase
- (c) moves in one direction of the site
- (d) moves in bi-directional way. (2004)
25.Lichens are well known combination of an alga and a fungus where fungus has
- (a) a saprophytic relationship with the alga
- (b) an epiphytic relationship with the alga
- (c) a parasitic relationship with alga
- (d) a symbiotic relationship with alga.
(2004)
26.Chromosomes in a bacterial cell can be 1 —3 in number and
- (a) are always circular
- (b) are always linear
- (c) can be either circular or linear, but never both within the same cell
- (d) can be circular as well as linear within the same cell. (2003)
27.Which one of the following statements about viruses is correct ?
- (a) Viruses possess their own metabolic
- system.
- (b) All viruses contain both RNA and DNA.
- (c) Viruses are obligate parasites,
- (d) Nucleic acid of viruses is known as capsid.
(2003)
28.Tobacco mosaic virus is a tubular filament of size
(a) 300×10 nm (b) 300×5 nm
(c) 300 x 20 nm (d) 700 x 30 nm.
(2003)
29.Viruses are no more “alive” than isolated chromosomes because
(a) they require both RNA and DNA
(b) they both need food molecules
(c) they both require oxygen for respiration
(d) both require the environment of a cell to replicate. (2003)
30.Which one of the following is true for fungi?
(a) They lack a rigid cell wall.
(b) They are heterotrophs
(c) They lack nuclear membrane
(d) They are phagotrophs.
(2013)
31.Which one ofthe following also as a catalyst in a bacterial cell?
(a) 5SrRNA (b) snRNA,
(c) hnRNA (d) 23Sn RNA
32.In eubacteria, acellular component that resembles eukaryotic cell is
(a) plasma membrane (b) nucleus
(c) ribosomes (d) cell wall,
- Maximum nutritional diversity is found in the group
(a) fungi (b) animalia
(c) monera (d) plantae.
(2012) - Nuclear membrane is absent in
(a) Penicillium (b) Agaricus
(c) Volvox (d) Nostoc
(2012) - The cyanobacteria are also referred to as
(a) protists (b) golden algae
(c) slime moulds (d) blue green algae.
(2012) - The most abundant prokaryotes helpful to humans in making curd from milk and in production of antibiotics are the ones categorised as
(a) cyanobacteria
(b) archaebacteria
(c) chemosynthetic autotrophs
(d) heterotrophic bacteria. (2012) - Which one single organism or the pair of organisms is correctly assigned to its or their named taxonomic group?
- (a) Paramecium and Plasmodium belong to the same kingdom as that of Penicillium.
- (b) Lichen is a composite organism formed from the symbiotic association of an algae and a protozoan.
- (c) Yeast used in making bread and beer is a fungus.
- (d) Nostoc and Anabaena are examples of
- protista (2012)
- Which one of the following microbes forms symbiotic association with plants and helps them in their nutrition? (a) Azotobacter (b) Aspergillus(c) Glomus (d) Trichoderma (2012)
39.One of the free-living, anaerobic nitrogen-fixer is
(a) Beijernickia (b), Rhodospirillum
(c) Rhizobium (d) Azotobacter.
(2010)
40.Membrane-bound organelles are absent in
(a) Saccharomyces (b) Streptococcus
(c) Chlamydomonas (d) Plasmodium.
