Related Questions
What is the correct answer?
4
Assume that two normal hyphal cells of different fungal mating types unite. After a period of time, the cell between these cells will dissolve producing a
D. dikaryotic cell, which is also heterokaryotic
What is the correct answer?
4
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.
What is the correct answer?
4
Which of the following are the characters of dinoflagellates?
(i) They are planktonic golden yellow algae with soap box like structure.
(ii) They are marine red biflagellated protista.
(iii) They appear yellow, green, brown, blue and red in colour.
(iv) They are biflagellated organisms with pellicle.
(v) They are saprophytic (or) parasitic unicellular forms.
What is the correct answer?
4
The genetic material of virus includes
D. RNA or DNA i.e. one nucleic acid in a virus.
What is the correct answer?
4
Chemosynthetic autotrophic bacteria are named so because
A. they oxidize various inorganic substances such as nitrates, nitrites and ammonia and use the released energy for their ATP production.
B. they oxidize various organic substances and use the released energy for their ATP production.
What is the correct answer?
4
Bladderwort and Venus fly trap are examples of
What is the correct answer?
4
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?
What is the correct answer?
4
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.
C. (i), (ii), (iv), and (v)
What is the correct answer?
4
Which of the following statements regarding cyanobacteria is incorrect?
A. It is also called blue green algae.
B. They are chemosynthetic autotrophs.
C. It forms blooms in polluted water bodies.
D. It is unicellular, colonial or filamentous, marine or terrestrial bacteria.
What is the correct answer?
4
Fungi show asexual reproduction by all of the following kinds of spores except
What is the correct answer?
4
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 ?
What is the correct answer?
4
Select the correct match from the given option.
A. Occurrence of dikaryotic stage - ascomycetes and basidiomycetes.
B. Saprophytes - They are autotrophic and absorb soluble organic matter from dead substrates.
C. Vegetative mean of reproduction in fungi - fragmentation, budding and sporangiophores.
D. Steps involved in asexual cycle of fungi - plasmogamy, karyogamy and meiosis in zygote resulting in haploid spores.
What is the correct answer?
4
A virus can be considered a living organism because it
A. responds to touch stimulus
C. reproduces (inside the host)
What is the correct answer?
4
Which of the following statement is correct for dinoflagellates flagella ?
A. A single flagellum lies in the transverse groove between the cell plates.
B. A single flagellum lies in the longitudinal groove between the cell plates.
C. Two flagella, one lies longitudinally and the other transversely in a furrow between the wall plates.
What is the correct answer?
4
The bacteria which oxidize various inorganic substances and use the released energy for their ATP production are called _______________.
B. Heterotrophic bacteria
C. Photosynthetic autotrophic bacteria
D. Chemosynthetic autotrophic bacteria
What is the correct answer?
4
Which of the following is an example of amoeboid protozoans ?
What is the correct answer?
4
The given characters are seen in which of the following group?
(i) Unicellular, colonial, filamentous, marine or terrestrial forms.
(ii) The colonies are surrounded by a gelatinous sheath.
(iii) Some can fix atmospheric nitrogen in specialized cells called heterocysts.
(iv) They often form blooms in water bodies.
What is the correct answer?
4
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. A-(i) B-(ii) C-(iii) D-(iv) E-(v)
B. A-(iii) B-(v) C-(ii) D-(iv) E-(i)
C. A-(iii) B-(i) C-(v) D-(ii) E-(iv)
D. A-(v) B-(iv) C-(iii) D-(i) E-(ii)
What is the correct answer?
4
The symbiotic association of fungi and algae is called
What is the correct answer?
4
Which of the following pair is correctly matched ?
A. Fungi Saprophytic parasitic mode of nutrition.
B. Monera Nuclear membrane is present.
C. Plantae Cell wall is made up of cellulose.
D. Animalia Cell wall is absent.
What is the correct answer?
4
The most abundant prokaryotes helpful to humans in making curd from milk and in production of antibiotics are the ones categorised as
C. chemosynthetic autotrophs
D. heterotrophic bacteria
What is the correct answer?
4
How many organisms in the list given below are autotrophs? Lactobacillus, Nostoc, Chara, Nitrosomonas, Nitrobacter, Streptomyces, Saccharomyces, Trypanosomes, Porphyra, Wolffia
What is the correct answer?
4
Refer the given figure of bacteria cell and Nostoc and choose the option which shows correct label for the structure marked as A, B, C, D and E ?
A. A – Cell wall, B – Cell membrane, C – Heterocyst, D – DNA, E – Mucilagenous sheath
B. A – Cell wall, B – Cell membrane, C – DNA, D – Heterocyst, E – Mucilagenous sheath
C. A – Mucilagenous sheath, B – Cell membrane, C – DNA, D – Heterocyst, E – Cell wall
D. A – Cell membrane, B – Cell wall, C – DNA, D – Heterocyst, E – Mucilagenous sheath
What is the correct answer?
4
Which scientist classify plants into trees, shrubs and herbs & animals into two groups having red blood cells and without red blood cells?
What is the correct answer?
4
Which of the following characteristic(s) is used by Whittaker for the classification of organisms ?
C. Phylogenetic relationships
What is the correct answer?
4
Ustilago causes plant diseases (called smuts) because
A. they parasitize on cereals.
C. they develop sooty masses of spores.
D. their affected parts becomes completely black.
What is the correct answer?
4
Which of the following is/are example(s) of deuteromycetes?
What is the correct answer?
4
Which class of fungi lacks sex organs but the process of plasmogamy is brought about by fusion of two vegetative or somatic cells of different strains or genotypes?
What is the correct answer?
4
Why food can be kept for a longer time in cold house than in normal conditions ? Because,
B. bacterial multiplication stops.
C. bacterial multiplication is reduced.
D. there is plasmolysis at low temperature.
What is the correct answer?
4
Which of the following class of fungi is being described by the given statements ?
(i) They are found in aquatic habitats and on decaying wood in moist and damp places.
(ii) Mycelium is aseptate and coenocytic.
(iii) Asexual reproduction takes place by zoospores (motile) or by aplanospores (non-motile).
(iv) Some common examples are Mucor, Rhizopus and Albugo.