Which of the following statement is correct?

Which of the following are found in extreme saline conditions?

Which of the following organisms are known as chief producers in the oceans?

Oxygen is not produced during photosynthesis by

Which of the following is incorrect about cyanobacteria?

The size of Pleuropneumonia Like Organism (PPLO) is

Which among the following are the smallest living cells, known without a definite cell wall, pathogenic to plants as well as animals and can survive without oxygen?

The primitive prokaryotes responsible for the production of biogas from the dung of ruminant animals, include the

Which one of the following statements is wrong?

Methanogens belong to

Chromatophores take part in

Archaebacteria differ from eubacteria in

Besides paddy fields, cyanobacteria are also found inside vegetative part of

Pigment-containing membranous extensions in some cyanobacteria are

Which of the following are likely to be present in deep sea water?

The cyanobacteria are also referred to as

Nuclear membrane is absent in

In eubacteria, a cellular component that resembles eukaryotic cells is

Organisms called methanogens are most abundant in a

A prokaryotic autotrophic nitrogen fixing symbiont is found in

Maximum nutritional diversity is found in the group

Some hyperthermophilic organisms that grow in highly acidic habitats belong to the two groups called

Thermococcus, Methanococcus and Methanobacterium exemplify

Bacterial leaf blight of rice is caused by a species of

Which one of the following statements about Mycoplasma is wrong?

Barophillic prokaryotes

A free living nitrogen fixing cyanobacterium which can also form symbiotic association with the water fern Azolla is

Chromosomes in a bacterial cell can be 1-3 in number and

Organisms which obtain energy by the oxidation of reduced inorganic compounds are called

In bacteria, plasmid is

What is true for archaebacteria?

What is true for cyanobacteria?

What is true for photolithotrophs?

Photosynthetic bacteria have pigments in

A few organisms are known to grow and multiply at temperatures of 100-105°C. They belong to

The hereditary material present in the bacterium Escherichia coli is

Bacterium divides every 35 minutes. If a culture containing 105 cells per mL is grown for 175 minutes, what will be the cell concentration per mL after 175

The site of respiration in bacteria is

In bacterial chromosomes, the nucleic acid polymers are

Sex factor in bacteria is

The plasmid

Temperature tolerance of thermal blue-green algae is due to

Escherichia coli is used extensively in biological research as it is

Genophore bacterial genome or nucleoid is made of

Bacteria lack alternation of generation because there is

Which one belongs to the Monera?

Ciliates differ from all other protozoans in

Chrysophytes, euglenoids, dinoflagellates and slime moulds are included in the kingdom

Select the wrong statement.

Pick up the wrong statement.

In which group of organisms the cell walls form two thin overlapping shells which fit together?

What is common about Trypanosoma, Noctiluca, Monocystis and Giardia?

Auxospores and hormocysts are formed respectively by

Which of the following unicellular organism has a macro-nucleus for trophic function and one or more micro-nuclei for reproduction?

When a freshwater protozoan possessing a contractile vacuole is placed in a glass containing marine water, the vacuole will

The chief advantage of encystment to an Amoeba is

In which animal, dimorphic nucleus is found?

Extranuclear inheritance occurs in

Which of the following organisms possesses characteristics of both a plant and an animal?

Macro and micronucleus are the characteristic feature of

When a freshwater protozoan possessing a contractile vacuole, is placed in a glass containing marine water, the vacuole will

In Protozoa like Amoeba and Paramecium, an organelle is found for osmoregulation which is

Excretion in Amoeba occurs through

Protistan genome has

Entamoeba coli causes

Protists obtain food as

African sleeping sickness is due to

In Amoeba and Paramecium osmoregulation occurs through

Genetic information in Paramecium is contained in

Plasmodium, the malarial parasite, belongs to class

What is true about Trypanosoma?

rypanosoma belongs to class

Select the wrong statement.

Which of the following would appear as the pioneer organisms on bare rocks?

One of the major components of cell wall of most fungi is

Which one of the following is wrong for fungi?

Choose the wrong statement.

The imperfect fungi which are decomposers of litter and help in mineral cycling belong to

The highest number of species in the world is represented by

Which one of the following has haplontic life cycle?

Which one is the wrong pairing for the disease and its causal organism?

Trichoderma harzianum has proved a useful microorganism for

Cellulose is the major component of cell walls of

Which of the following is a slime mold?

Ergot of rye is caused by a species of

Which pair of the following belongs to Basidiomycetes?

The thalloid body of a slime mold (Myxomycetes) is known as

There exists a close association between the alga and the fungus within a lichen. The fungus

Lichens are well known combination of an alga and a fungus where fungus has

During the formation of bread it becomes porous due to the release of CO2 by the action of

Which fungal disease spreads by seed and flowers?

Plant decomposers are

Adhesive pad of fungi penetrates the host with the help of

In fungi stored food material is

Black rust of wheat is caused by

Which of the following is the use of lichens in case of pollution?

Columella is a specialised structure found in the sporangium of [

Puccinia forms

Most of the lichens consist of

Which one of the following is not true about lichens?

Which of the following is not correctly matched?

The chemical compounds produced by the host plants to protect themselves against fungal infection is

White rust disease is caused by

Ustilago caused plant diseases are called smuts because

Absorptive heterotrophic nutrition is exhibited by

Lichens indicate SO2 pollution because they

Which of the following statements is incorrect?

Viroids differ from viruses in having

Which of the following statements is wrong for viroids?

Select wrong statement.

Which of the following shows coiled RNA strand and capsomeres?

Which statement is wrong for viruses?

Virus envelope is known as

TO Diener discovered a

Viruses that infect bacteria, multiply and cause their lysis are called

Which of the following statements is not true for retroviruses?

Viruses are no more ‘alive’ than isolated chromosomes because

Which one of the following statements about viruses is correct?

Tobacco mosaic virus is a tubular filament of size

Interferons are synthesised in response to

Cauliflower mosaic virus contains

Which one of the following statements about viruses is correct?

Influenza virus has

Tobacco Mosaic Virus (TMV) genes are