Which of the following is an example of amoeboid protozoans ?
Trypanosoma
Paramecium
Gonyaulax
Entamoeba
Correct Answer :
D. Entamoeba
Amoeboid protozoans are organisms that live in fresh water, sea water or moist soil. They move and capture their prey by putting out pseudopodia (e.g. Amoeba). Some of them such as Entamoeba are parasites.
Related Questions
Which of the following is not a viral disease ?
AIDS and mumps
Small pox and herpes
Influenza
Cholera
Which of the following is used extensively in biochemical and genetic work ?
Agaricus
Alternaria
Neurospora
Mucor
Fungi show asexual reproduction by all of the following kinds of spores except
conidia
oospores
sporangiospores
zoospores
Mycorrhizae are useful for plants because they
fix atmospheric nitrogen.
enhance absorption of nutrients from the soil.
kill insects and pathogen.
provide resistance against abiotic stresses.
Which of the following is a parasitic fungi on the mustard plant ?
Albugo
Puccinia
Yeast
Ustilago
Match column I (containing fungus name) with column II (common name) and choose the correct options.
| Column-I | Column-II |
|---|---|
| (Fungus name) | (Commonly called) |
| A. Puccinia | I. Yeast |
| B. Ustilago | II. Mushroom |
| C. Agaricus | III. Smut fungus |
| D. Saccharomyces | IV. Rust fungus |
A I, B II, C III, D IV
A II, B III, C IV, D I
A III, B IV, C I, D II
A IV, B III, C II, D I
Which of the following is smallest living cell and can live without oxygen ?
Mycoplasma
Mycorrhiza
Euglena
Trypanosoma
Which of the following pair is correctly matched ?
Fungi Saprophytic parasitic mode of nutrition.
Monera Nuclear membrane is present.
Plantae Cell wall is made up of cellulose.
Animalia Cell wall is absent.
Match the class of fungi given in column I with their examples given in column II and choose the correct option
| Column-I | Column-II |
|---|---|
| (Class of fungi) | (Examples) |
| A. Ascomycetes | I. Rhizopus |
| B. Basidiomycetes | II. Penicillium |
| C. Deuteromycetes | III. Ustilago |
| D. Phycomycetes | IV. Alternaria |
A IV, B III, C I, D II
A II, B III, C IV, D I
A IV, B I, C II, D III
A III, B IV, C II, D I
Bacteria are found to be primitive organisms because they
are small, microscopic which are not seen with naked eye.
cause serious diseases to human being, domesticated animals and crop plants.
produce endospores which are very resistant to adverse conditions.
possess incipient nucleus and show amitotic division.
Match column I with column II and choose the correct option.
| Column I | Column II |
|---|---|
| A. Mycoplasma | (i) Nitrogen fixing cells |
| B. Decomposers | (ii) Blue green algae |
| C. Methanogens | (iii) Production of methane |
| D. Heterocysts | (iv) Most abundant heterotrophs |
| E. Cyanobacteria | (v) Pathogenic in plants and animals |
A-(i) B-(ii) C-(iii) D-(iv) E-(v)
A-(iii) B-(v) C-(ii) D-(iv) E-(i)
A-(iii) B-(i) C-(v) D-(ii) E-(iv)
A-(v) B-(iv) C-(iii) D-(i) E-(ii)
Clamp connection is found in
basidiomycetes
ascomycetes
saccharomycetes
haplomycetes
Read the following statements and answer the question given below
(i) They are saprophytic protists.
(ii) Under suitable conditions, they form an aggregation (called plasmodium) which may grow and spread over several feet.
(iii) During unfavourable conditions, the plasmodium differentiates and forms fruiting bodies bearing spores at their tips.
Which of the following class of protists is being described by the above statements ?
Euglenoids
Dinoflagellates
Slime moulds
Protozoans
The subunit of capsid is called
core
nucleotide
amino acid
capsomere
Fungi are filamentous with the exception of X which is unicellular. Identify X.
Yeast
Algae
Bacteria
Lichen
Which statement is not correct for viruses ?
Viruses are obligate parasites.
Viruses can multiply only when they are inside the living cells.
Viruses cannot pass through bacterial filters.
Viruses are made up of protein and DNA or RNA (never both DNA and RNA).
How many bacteria are produced in four hours if a bacterium divides once in half an hour ?
8
64
16
256
Choose the correct statements (i v) regarding mycoplasma
(i) Mycoplasma has no cell wall.
(ii) Mycoplasma is the smallest living organism.
(iii) Mycoplasma cannot survive without O2.
(iv) Mycoplasma are pathogenic in animals and plants.
(v) A sort of sexual reproduction occurs in bacterium by adopting a primitive DNA transfer from one bacterium to the other.
Only (iii)
(i), (iii) and (v)
(i), (ii), (iv), and (v)
All of the above
Plasmogamy is the fusion of
two haploid cells including their nuclei.
two haploid cells without nuclear fusion.
sperm and egg.
sperm and two polar nuclei.
How many organisms in the list given below are autotrophs? Lactobacillus, Nostoc, Chara, Nitrosomonas, Nitrobacter, Streptomyces, Saccharomyces, Trypanosomes, Porphyra, Wolffia
Four
Five
Six
Three
The given figure shows some labelled structure as A, B, C and D. In which structure the protein coat that encloses the nucleic acid is present?
A
B
C sheath
D tail fibres
Bacteria were regarded to be plants because
some of them are green in colour.
they are present every where.
some of them cannot move.
they have a rigid cell wall.
Match the class of fungi given in column-I with their common name given in column-II and select the correct option.
| Column-I | Column-II |
|---|---|
| (Class of fungi) | (Common name) |
| A. Phycomycetes | I. Sac fungi |
| B. Ascomycetes | II. Algal fungi |
| C. Basidiomycetes | III. Fungi imperfecti |
| D. Deuteromycetes | IV. Club fungi |
A II, B I, C IV, D III
A II, B IV, C I, D III
A IV, B I, C II, D III
A IV, B III, C II, D I
Which of the following characteristic(s) is used by Whittaker for the classification of organisms ?
Mode of nutrition
Thallus organisation
Phylogenetic relationships
All of the above
T. O. Diener discovered a new infectious agent that was smaller than viruses and have the following characteristics.
(i) It causes potato spindle tuber disease.
(ii) It has free RNA.
(iii) Molecular weight of RNA is low.
Identify the infections agent.
Viruses
Viroids
Virion
Mycoplasma
Which of the following statement is incorrect ?
TMV has a double-stranded RNA molecule.
Most plant viruses are RNA viruses.
The bacteriophage has a double-stranded DNA molecule.
Most animal viruses are DNA viruses.
A virus can be considered a living organism because it
responds to touch stimulus
respires
reproduces (inside the host)
can cause disease
A specimen of fungus is brought by a student for identification. Upon close examination, he discovered that its hyphae are completely septate and it has gills on the underside of the pileus. To which fungal group does it most likely belong ?
Basidiomycetes
Zygomycetes
Ascomycetes
Chytrids
Match column-I (Characters/feature) with column-II (examples) and choose the correct option.
| Column-I | Column-II |
|---|---|
| (Characters/features) | (Examples) |
| A. Red dinoflagellates | I. Rhizopus |
| B. Unicellular fungi used to | II. Gonyaulax make bread and beer |
| C. Source of antibiotics | III. Yeast |
| D. Bread mould | IV. Penicillium |
A III; B II; C I; D IV
A II; B III; C I; D IV
A II; B III; C IV; D I
A II; B IV; C III; D I
The figure given below shows the structure of a bacteriophage. Identify its parts labelled as A, B, C and D.
A - Tail fibres B - Head C - Sheath D - Collar
A - Sheath B - Collar C - Head D - Tail fibres
A - Head B - Sheath C - Collar D - Tail fibres
A - Collar B - Tail fibres C - Head D - Sheath