Ergot of rye is caused by a species of:
Phytophthora
Uncinula
Ustilago
Claviceps
True nucleus is absent in
Anabaena
Mucor
Vaucheria
Volvox
Cell wall is absent in
Aspergillus
Funaria
Mycoplasma
Nostoc
Which of the following statements regarding Euglenoids is not true?
Instead of a cell wall, they have a lipid rich pellicle
They have two flagella, a short and a long one
They are photosynthetic in the presence of sunlight but behave like a heterotroph when deprived of sunlight
Pigments of Euglenoids are identical to those present in higher plants
Identify the incorrectly matched pair:
Diatoms: Chief producers in oceans
Dinoflagellates: Red tides
Slime moulds: Spores dispersed by water
Euglenoids: Protein rich pellicle
The domain Archaea is not characterized by:
Pseudopeptidoglycan in cell wall
Linear chromosomes
Introns present is some genes
Methanogeneisis as unique metabolism
Members of Kingdom Protista:
are primarily aquatic
do not have membrane bound organelles
are all ciliated or flagellated
reproduce exclusively by asexual means
In five kingdom classification, which single kingdom contains blue-green algae, nitrogen-fixing bacteria and methanogenic archaebacteria
Monera
Protista
Plantae
Fungi
In five-kingdom classification, unicellular green algae are included in the kingdom
Metaphyta
Metazoa
Fungi usually store the reserve food material in the form of
Starch
Glycogen and oil
Lipid
Protein
Consider the following regarding the reasons for the fact that now Cyanobacteria are kept in Monera and not in Plantae:
I. They are prokaryotes.
II. The cell wall of cyanobacteria has peptidoglycan.
III. They can fix atomspheric nitrogen
The correct explanations would be:
I and II only
I and III only
II and III only
I, II and III
Thermococcus, Methanococcus and Methanobacterium exemplify
archaebacteria that contain protein homologous to eukarytic core histones
archaebacteria that lack any histones resembling those found in eukaryotes but whose DNA is negatively supercoiled
bacteria whose DNA is relaxed or positively supercoiled but which have a cytoskeleton as well as mitochondria
bacteria that contain a cytoskeleton and ribosomes
Which of the following is a flowering plant with nodules containing filamentous nitrogen-fixing microorganism?
Casuarina equisetifolia
Crotolaria juncea
Cycas revoluta
Cicer arietinum
Which of the following are valid pointers to the demerits of the two kingdom classification proposed by Linnaeus?
I. Euglena has features both of plants and animals.
II. Chlamydomanas is autotrophic but has flagella.
III. Slime molds resemble animals in one phase of their life cycle and plants in the other phase.
Identify the group that is not matched correctly to all the characters shown
Math Column I with Column II and choose your answer from the codes given:
Column I (Bacterium)
Column II (shape)
I.
Escherechia coli
1.
Spherical
II.
Streptococcus pyogenes
2.
Helically coiled
III.
Treponema pallidum
3.
Rod shaped
I
II
III
(1)
3
(2)
1
2
(3)
(4)
Identify the incorrect statement regarding bacteria:
Bacteria are the most abundant micro-organisms.
Bacteria live in extreme habitats where very few other life forms can survive.
Bacteria as a group show the most extensive metabolic diversity.
They are obligate intracellular parasites.
Consider the following statements regarding characters of Archaebacteria that they share with eukaryotes:
I. The cell wall does not contain peptidoglycan.
II. DNA associated with histones.
III. Translation initiated with formylated methionine.
IV. RNA polymerase similar to eukaryotic RNA polymerase II
V. ATPase similarity
VI. Similar DNA replication and repair
How many of the above characters Archaebacteria share with eukaryotes?
4
5
6
Identify a character that is not unique to archaebacteria:
Flagellin protein structure
Fatty acid synthetase present
Cell wall structure
Cell membrane structure
Identify the incorrect statement regarding true bacteria?
As a group, they exhibit maximum metabolic diversity
Chemosynthetic autotrophic bacteria play a great role in recycling nutrients like nitrogen, phosphorous, iron and sulphur.
Heterotrophic bacteria are the most abundant in nature.
Bacteria reproduce mainly by fission but sometimes under favourable conditions, they produce spores.
Consider the following statements regarding Mycoplasma:
I. They are a genus of bacteria that have a unique cell wall of their own.
II. In their genetic code UGA codes for tryptophan.
III. None of them is pathogenic to humans.
IV. They have a large genome.
V. They can be killed by penicillins.
VI. They can survive without oxygen
The number of correct statements is:
Diatoms have left behind large amount of cell wall deposits in their habitat because:
They are most abundant in that habitat
Their life span is long
Their wall is indestructible
The statement is not true.
Dinoflagellates:
I. Are mostly marine and photosynthetic.
II. Have a cell wall that has stiff cellulose plates on the outer surface.
III. Have two flagella
IV. Have chloroplasts bound by three membranes
The correct statements are:
I, III and IV
II, III and IV
I, II III and IV
Consider the following characters:
I. Heterotroph organisms
II. A dikaryon stage
III. Cell wall made of chitin
IV. Undergo nuclear mitosis
Which of the above relate to fungi?
I, II, III and IV
How many of the following statements regarding fungi are true?
I. Asexual reproduction is common by the formation of spores.
II. Their bodies consist of hyphae that many be interconnected to form mycelium.
III. They secrete digestive enzymes onto organic matter and then absorb the products of the digestion.
IV. Fungi can break down almost any carbon containing product.
V. Fungi do not enter symbiotic relationships.
Which of the following is not an edible mushroom?
Agaricus bispora
Pleurotus ostreatus
Lentinula edodes
Amantia phalloides
I. Nuclear envelope
II. Membranes lacking sterols
III. 80s ribosomes
IV. split genes
The character not shared by fungi with other eukaryotes is/are:
II alone
IV alone
II and IV only
III and IV only
Fungi resemble plants in:
Lack of chloroplasts and heterotrophic nutrition
Reproduction by only sexual means
Having a cell wall and vacuoles
Exhibition of bioluminiscence
Identify the characteristic that is unique to fungi:
Cell wall of glucans and chitin
Mannitol, trehalose and glycogen as storage products.
Having haploid nuclei and production of spores
What is not true for Mycorrhizae?
I. Nearly 30% of vascular plants have this symbiotic relationship with fungi.
II. The fungus primarily makes nitrogen available to plants.
III. Fungi get organic carbon from plants.
I alone
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