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NEET/Medical PG Medical K-12-Medical
24 followers study24x7 30 Apr 2019 05:07 PM study24x7 study24x7

Viruses have

A

DNA enclosed in a protein coat

B

Prokaryotic nucleus

C

Single chromosome

D

Both DNA and RNA

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24 followers study24x7 30 Apr 2019 04:22 PM study24x7 study24x7

Pigment-containing membranous extensions in some cyanobacteria are:

A

Heterocysts

B

Basal bodies

C

Pneumatophores

D

Chromatophores

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  • Edubabble LLP
  • Chromatophore is a pigmented lamellar or vesicular structure that can be isolated from disrupted photosynthetic bacteria or cyanobacteria. A cyanobacterium is having membranous extensions that are containing pigments that are known as chromatophores that are responsible for photosynthesis. It is having chlorophyll similar to green plants and thus acts as photosynthetic autotrophs. The colonies of this bacterium are generally surrounded by gelatinous sheath. A cyanobacterium is having membranous extensions that are containing pigments that are known as chromatophores that are responsible for photosynthesis.
    24 followers study24x7 30 Apr 2019 04:13 PM study24x7 study24x7

    Maximum nutritional diversity is found in the group

    A

    Monera

    B

    Plantae

    C

    Fungi

    D

    Animalia

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    24 followers study24x7 30 Apr 2019 04:09 PM study24x7 study24x7

    Which one of the following organisms is not an example of eukaryotic cells ?

    A

    Amoeba proteus

    B

    Paramecium caudatum

    C

    Escherichia coli

    D

    Euglena viridis

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    24 followers study24x7 30 Apr 2019 04:04 PM study24x7 study24x7

    Organisms called methanogens are most abundant in a:

    A

    Hot spring

    B

    Sulphur rock

    C

    Cattle yard

    D

    Polluted stream

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    24 followers study24x7 29 Apr 2019 01:00 PM study24x7 study24x7

    Some hyperthermophilic organisms that grow in highly acidic (pH2) habitats belong to the two Groups:

    A

    Eubacteria and archaea

    B

    Cyanobacteria and diatoms

    C

    Protists and mosses

    D

    Liverworts and yeasts

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    24 followers study24x7 29 Apr 2019 12:52 PM study24x7 study24x7

    Ringworm in humans is caused by:

    A

    Bacteria

    B

    Fungi

    C

    Nematodes

    D

    Viruses

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    24 followers study24x7 29 Apr 2019 12:46 PM study24x7 study24x7

    Virus envelope is known as

    A

    Capsid

    B

    Virion

    C

    Nucleoprotein

    D

    Core

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    24 followers study24x7 29 Apr 2019 12:25 PM study24x7 study24x7

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

    A

    Root-knot of vegetables: Meloidogynespecies

    B

    Late blight of potato: Alternaria solani

    C

    Black rust of wheat: Puccinia graminis

    D

    Loose smut of wheat: Ustilago nuda

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    24 followers study24x7 29 Apr 2019 12:16 PM study24x7 study24x7

    Bacterial leaf blight of rice is caused by a species of:

    A

    Alternaria

    B

    Erwinia

    C

    Xanthomonas

    D

    Pseudomonas

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    24 followers study24x7 27 Apr 2019 06:02 PM study24x7 study24x7

    Thermococcus, Methanococcus and Methanobacterium exemplify:

    A

    bacteria whose DNA is relaxed or positively supercoiled but which have a cytoskeleton as well as mitochondria

    B

    bacteria that contain a cytoskeleton and ribosomes

    C

    archaebacteria that contain protein homologous to eukaryotic core histones

    D

    archaebacteria that lack any histones resembling those found in eukaryotes but whose DNA is negatively supercoiled.

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    24 followers study24x7 27 Apr 2019 05:08 PM study24x7 study24x7

    Which one of the following statements about mycoplasma is wrong?

    A

    They cause diseases in plants

    B

    They are also called PPLO

    C

    They are pleomorphic

    D

    They are sensitive to penicillin

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    24 followers study24x7 27 Apr 2019 05:07 PM study24x7 study24x7

    Ergot of rye is caused by a species of:

    A

    Claviceps

    B

    Phytophthora

    C

    Uncinula

    D

    Ustilago

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    24 followers study24x7 27 Apr 2019 05:06 PM study24x7 study24x7

    The causative agent of mad-cow disease is ?

    A

    Bacterium

    B

    Prion

    C

    Worm

    D

    Virus

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    24 followers study24x7 27 Apr 2019 05:04 PM study24x7 study24x7

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

    A

    Protonema

    B

    Plasmodium

    C

    Fruiting body

    D

    Mycelium

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