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Test: Biological Classification 4 - From Past 28 Years Questions


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25 Questions MCQ Test Biology 31 Years NEET Chapterwise Solved Papers | Test: Biological Classification 4 - From Past 28 Years Questions

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Test: Biological Classification 4 - From Past 28 Years Questions - Question 1

A virus can be considered a living organism because it [2000]

Detailed Solution for Test: Biological Classification 4 - From Past 28 Years Questions - Question 1

Virus  is an  ultra microscopic nucleoprotein entity which becomes active only inside a living cell. It resembles living beings due to presence of genetic material and  reproduction.

Test: Biological Classification 4 - From Past 28 Years Questions - Question 2

In fungi stored food material is [2000]

Detailed Solution for Test: Biological Classification 4 - From Past 28 Years Questions - Question 2

Glycogen is a glucosan Ohomopolysaccharide which is the major reserve food of animals, fungi and some bacteria. Starch is also glucosan homopolysaccharide and is  the major reserve food of plants. Sucrose is formed of one molecule of glucose and one molecule of fructose.

Test: Biological Classification 4 - From Past 28 Years Questions - Question 3

Black rust of wheat is caused by [2000]

Detailed Solution for Test: Biological Classification 4 - From Past 28 Years Questions - Question 3

Black rust of wheat is caused by Puccinia graminis. The symptoms are seen in stem or leaf sheath as brownish spot.
Yeast helps in ethyl alcohol formation.

Test: Biological Classification 4 - From Past 28 Years Questions - Question 4

Industrial production of ethanol from starch is brought about by [2000]

Detailed Solution for Test: Biological Classification 4 - From Past 28 Years Questions - Question 4

Lactobacillus is the milk bacteria while Azotobacter is the free living nitrogen fixing bacteria and Penicillium is the source of Penicillin.

Test: Biological Classification 4 - From Past 28 Years Questions - Question 5

Interferons are synthesized in response to

Detailed Solution for Test: Biological Classification 4 - From Past 28 Years Questions - Question 5

Interferons are virus induced proteins produced by cells infected with virus.

Test: Biological Classification 4 - From Past 28 Years Questions - Question 6

Extra-nuclear inheritance occurs in [2001]

Detailed Solution for Test: Biological Classification 4 - From Past 28 Years Questions - Question 6

Colour blindness follows sex-linked inheritance. Phenylketonuria is an in born error of metabolism.

Test: Biological Classification 4 - From Past 28 Years Questions - Question 7

What is true for cyanobacteria? [2001]

Detailed Solution for Test: Biological Classification 4 - From Past 28 Years Questions - Question 7

Cyanobacteria are oxygenic photoautotroph. Many members perform nitrogen fixation. 

Test: Biological Classification 4 - From Past 28 Years Questions - Question 8

What is true for archaebacteria ? [2001]

Detailed Solution for Test: Biological Classification 4 - From Past 28 Years Questions - Question 8

Archaebacteria are the most ancient and halogenous group of bacteria and are called living fossils.

Test: Biological Classification 4 - From Past 28 Years Questions - Question 9

Cauliflower mosaic virus contains [2001]

Detailed Solution for Test: Biological Classification 4 - From Past 28 Years Questions - Question 9

Cauliflower mosaic virus contains double stranded DNA.

Test: Biological Classification 4 - From Past 28 Years Questions - Question 10

What is true for plasmid ? [2001]

Detailed Solution for Test: Biological Classification 4 - From Past 28 Years Questions - Question 10

Plasmids are small intranuclear circular DNAs which carry extra chromosomal genes in bacteria.

Test: Biological Classification 4 - From Past 28 Years Questions - Question 11

Plant decomposers are [2001]

Detailed Solution for Test: Biological Classification 4 - From Past 28 Years Questions - Question 11

Plant decomposers are Bacteria (Kingdom Monera) and Fungi.

Test: Biological Classification 4 - From Past 28 Years Questions - Question 12

Adhesive pad of fungi penetrates the host with the help of [2001]

Detailed Solution for Test: Biological Classification 4 - From Past 28 Years Questions - Question 12

The fungal hyphae secrete enzymes which convert insoluble complex food material in the substratum to the soluble ones. The hyphae wall  of intracellular hyphae come in contact with the host protoplasm and obtain food by direct diffusion.

Test: Biological Classification 4 - From Past 28 Years Questions - Question 13

Some bacteria able to grow in Streptomycin containing medium due to

Detailed Solution for Test: Biological Classification 4 - From Past 28 Years Questions - Question 13

Normally bacteria cannot survive in antibiotic containing medium but if it does so it must have acquired resistance against that antibiotic. These are well adapted to grow in streptomycin containing medium and thus are more evolved. So due to natural selection only the more evolved and better adapted species is able to survive.

Test: Biological Classification 4 - From Past 28 Years Questions - Question 14

Which bacteria is utilized in gober gas plant?

Detailed Solution for Test: Biological Classification 4 - From Past 28 Years Questions - Question 14

Methanobacillus (methanogen) occurs in marshes and also in dung. It produces CH4 gas under anaerobic condition and is utilized in gobar gas plant. 

Test: Biological Classification 4 - From Past 28 Years Questions - Question 15

In bacteria, plasmid is [2002]

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Plasmid is attached to mesosome in bacteria.

Test: Biological Classification 4 - From Past 28 Years Questions - Question 16

Which statement is correct for bacterial transduction ? [2002]

Detailed Solution for Test: Biological Classification 4 - From Past 28 Years Questions - Question 16

 Transduction experiments were carried out by Hershey and Chase.

Test: Biological Classification 4 - From Past 28 Years Questions - Question 17

Which of the following secretes toxins during storage conditions of crop plants? [2002]

Detailed Solution for Test: Biological Classification 4 - From Past 28 Years Questions - Question 17

Aspergillus f lavus produces carcinogenic fungus toxin (Aflatoxin) during storage condition of crop plant.

Test: Biological Classification 4 - From Past 28 Years Questions - Question 18

Which fungal disease spreads by seed and flowers? [2002]

Detailed Solution for Test: Biological Classification 4 - From Past 28 Years Questions - Question 18

Ustilago causes loose smut of wheat, as a result the grain and flower get converted into powdered mass.

Test: Biological Classification 4 - From Past 28 Years Questions - Question 19

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

Detailed Solution for Test: Biological Classification 4 - From Past 28 Years Questions - Question 19

Yeast carry out fermentation, releasing CO2 making bread soft and porous. Hence Saccharomyces is referred to as baker’s yeast. 

Test: Biological Classification 4 - From Past 28 Years Questions - Question 20

The chief advantage of encystment to an Amoeba is [2003]

Detailed Solution for Test: Biological Classification 4 - From Past 28 Years Questions - Question 20

Encystment enables the zygote to survive  under adverse or infavourable conditions wherein it lies dormant.

Test: Biological Classification 4 - From Past 28 Years Questions - Question 21

Viruses are no more “alive” than isolated chromosomes because [2003]

Detailed Solution for Test: Biological Classification 4 - From Past 28 Years Questions - Question 21

Viruses can live only inside the host cell, using their machinery for its own metabolism.

Test: Biological Classification 4 - From Past 28 Years Questions - Question 22

Chromosomes in a bacterial cell can be 1 – 3 in number  and [2003]

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 Prokaryotes (bacteria) have only circular chromosomes.

Test: Biological Classification 4 - From Past 28 Years Questions - Question 23

Which one of the following statements about viruses is correct ? [2003]

Detailed Solution for Test: Biological Classification 4 - From Past 28 Years Questions - Question 23

Virus is a nucleoprotein entity which becomes active only inside a living cells utilizing the latter machinery for multiplication. Capsid is the protein covering around the genetic material.

Test: Biological Classification 4 - From Past 28 Years Questions - Question 24

Tobacco mosaic virus is a tubular filament of size[2003]

Detailed Solution for Test: Biological Classification 4 - From Past 28 Years Questions - Question 24

Tobacco mosaic virus is 300 nm long and 20 nm in diameter.

Test: Biological Classification 4 - From Past 28 Years Questions - Question 25

Lichens are well known combination of an alga and a fungus where fungus has [2004]

Detailed Solution for Test: Biological Classification 4 - From Past 28 Years Questions - Question 25

Lichens are composite dual organisms formed by symbiotic association between  a fungus and alga. A saprophyte is an organism feeding on dead, decaying organic matter. Epiphyte is a plant growing over another plant. Parasites live inside their host.

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