Plant Science Jrf 2019

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First 90 questions

Which element is a part of chlorophyll?

0 points

Clear selection

In India, domestic quarantine is in force for which of the following bananadiseases?

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Moko disease

Panama wilt

Bunchy top

Sigatoka

Clear selection

Which of the following is a polysaccharide?

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Sucrose

Maltose

Starch

Lactose

Clear selection

Which of the following belongs to the imperfect fungi?

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Puccinina

Phytophthora

Ustilago

Rhizoctonia

Clear selection

While analyzing the structural variation in DNA, the 'B' form of DNA consistsof how many base pairs per helical turn?

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10.5

8.5

Clear selection

If fertilty of the pollen is determined by the genotype of the pollenitself in F1, then it is?

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sporophytic male sterility

gametophytic male sterility

cytoplasmic male sterility

apomictic plants

Clear selection

In which direction, do the 5-3 phosphodiester bonds run, in Watsonand Crick DNA model?

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Parallel

Antiparallel

Forward

Alternate

Clear selection

Sphacelia phase is the characteristic of?

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Penicillium

Aspergillus

Claviceps

Curvularia

Clear selection

Presence of flagella all around the cell of bacteria is referred to as?

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Peritrichous

Monotrichous

Lophotrichous

A trichous

Clear selection

Assuming Hardy-Weinberg equilibrium, if the frequency of the two alleles at the gene being studied are 0.6 and 0.4, the genotypic frequency of heterozygotes will be

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0.80

0.48

0.64

0.16

Clear selection

Use of juvenile hormone and sex attractant comes under?

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1st generation insecticides

2nd generation insecticides

3rd generation insecticides

4th generation insecticides

Clear selection

Identfy the common step between aerobic and anaerobic respiration?

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glycolysis

citric acid cycle

ETC

glycolysis, citric acid cycle, and ETC

Clear selection

Monocot seed sowing epigeal germination is found in?

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rice

wheat

onion

maize

Clear selection

Actinomycetes have characters of both?

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) bacteria and algae

fungi and alga

fungi and viruses

bacteria and fungi

Clear selection

Okazaki fragment is related to?

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DNA synthesis

Protein synthesis

mRNA formation

tRNA formation

Clear selection

Bioassay of cytokinin is done by conducting?

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Dwarf maize test

Cotyledonary expansion test

Avena coleoptile test

Rice tip test

Clear selection

Bulked segregant analysis’ was proposed by?

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Vos et al

Williams et al

Botstein et al

Michelmore et al.

Clear selection

What is the source of D genome of wheat?

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Aegilops tauschii

T. monococcum

Aegilops speltoides

Aegilops squarosa

Clear selection

ICAR- National Bureau of Agriculturally Important Micro organisms islocated at?

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Ludhiana

Shimla

Mau

Bangalore

Clear selection

Who proposed the concept of 'Gene Pool'?

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Vavilov

Barbara McClintock

Harlan and de Wet.

Mather and Jink

Clear selection

In a crop plant, if the percentage of cross pollination exceeds 5 percent and may reach up to 30 per cent, then the pollination behavior of suchcrop species is refered as?

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cross pollinated

self-pollin ated

often cross pollinated

open pollinated

Clear selection

EDVS’ are?

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Extant derived varieties

Extinct derived varietie

Expressed derived varietie

Essentially derived varieties

Clear selection

Which of the following is an example of hesperidium?

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Apple

Orange

Pear

Pomegranate

Clear selection

How many types of gametes will be formed in F1 in a trihybrid cross?

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Clear selection

Pink boll worm is a serious pest of?

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Gram

Cotton

Mustard

Ladysfinger

Clear selection

Minimum population size required for recombination of all F1 gametes at random is?

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Clear selection

Single nucleotide polymorphism (SNP) is?

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biallelic

triallelic

monoallelic

null allele

Clear selection

Peach leaf curl is caused by?

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Fungi

Bacteria

Virus

Phytoplasma

Clear selection

Sclerotinia sclerotiorum produces ascocarp named?

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Apothecium

Pseudothecium

Cleistothecium

Perithecium

Clear selection

The process of breeding food crops that are rich in bioavailablemicronutrients is referred to as?

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Molecular breeding

Speed breeding

Quality breeding

Biofortification

Clear selection

Gir National Park is known for conservation of?

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Tiger

Rhino

Lion

Pelican

Clear selection

9 In 1965, which famous rose breeder was appointed as First DirectorGen eral of ICAR was?

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B. P. Pal

M. S. Swaminath an

Har Bhajan Sing

S. A. Hydari

Clear selection

Scientific name of maize used to make popcorn is?

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Zea mays indurata

Zea mays saccharata

Zea mays amylacea

Zea mays everta

Clear selection

The organic compound glucosinolates are present in members of thefamily?

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Caryophyllaceae

Chenopodiaceae

Euphorbiaceae

Brassicaceae

Clear selection

Total no. of nuclei involved in double fertilization in normal diploidplant is?

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Clear selection

Use of light traps for the management of pest is an example of?

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Chemical control

Mechanical control

Cultural control

Biological control

Clear selection

Which of the following is NOT a gram +ve bacterial plant pathogenicgenus?

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Rathayibacter

Streptomyces

Xanthomonas

Clavibacter

Clear selection

Sheath rot disease in paddy is caused by?

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Pyricularia enyzae

Sarocladium oryzae

Rhizoctonia oryzae

Helminthosporium oryzae

Clear selection

The tetrazolium chloride tests activity of

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peroxidase

superoxide dismutase

oxidase

dehydrogenase

Clear selection

ICAR-India Institute of Pulses Research is located at?

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Varanasi

Mau

Kanpur

Lucknow

Clear selection

Which one of the following is an example of a bacteria which in aninsecticidal?

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Bacillus polymyxa

Yersina pestis

Bacillus thurinegiensis

Klebsiella oxytocha

Clear selection

Which of the following is a simple interest disease?

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Powdery mildew of mango

Downy mildew of grapes

Rust of pea

Loose smut of wheat

Clear selection

Which of the following represents genome and chromosome number of theoilseed Brassica napus sub. sp. Napus?

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AACC, 38

BBCC, 34

CC, 18

AA, 20

Clear selection

The inner layer of ovary wall of an angiospermnis?

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Exocarp

Endocarp

Mesocarp

Polycarp

Clear selection

Heterostyly is observed in?

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Linseed

Orchids

Maize

Pearlmillet

Clear selection

Which is the single most important factor affecting drift?

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Spray volume

) Spray drop size

Kind of sprayer

Kind of solvent

Clear selection

Tifton A cytoplasm is found in?

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Sorghum

Rice

Pearl millet

Pigeon pea

Clear selection

In tRNA molecule, the D arm is named for the presence of the base?

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Dihydrouridine

Thymidine

Pseudouridine

Uridine

Clear selection

The enzyme GOGAT stands for?

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Glutamine 2-oxoglutarate aminotransferase

Glutamate oxoglutarate aminotransferase

Glutamine oxoglutarate aldolase

Glutamine 2-oxoglutarate

Clear selection

Common scale of potato is caused by

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Synchytrium endobioticum

Spongospora subterrana

Rhizoctonia bataticola

Streptomyces scabies

Clear selection

Complex corrin ring system and cobalt is present in?

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Vit B2

Vit B6

Vit B1

Vit B12

Clear selection

3 Die back disease is caused by the?

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virus

fungi

deficiency of 'Cu'

deficiency of Zn'

Clear selection

During the process of lint development in cotton, how many days afterfertilization does the lint gain maturity?

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45-50 days

70-75 days

100-105 days

75-80 days

Clear selection

The unit of radiation dose is called Gray (Gy) and 1 Gray equals?

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One Jule/gram of the irradiated object

One Jule/kg of the irradiated object

100 J/kg of the iradiated object

1000 J/kg of the iradiated object

Clear selection

If the sequence of bases in a section of DNA is TAGGCTAA,what are thecorres ponding sequenced bases in mRNA?

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ATCCGATT

TAGGCTAA

AUCCGAUU

AATCGGAT

Clear selection

Which of the following is NOT free living N fixers?

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Clostridium

Rhizobium

Rhodospirillum

Azotobacter

Clear selection

According to the dominance hypothesis of heterosis, which one of thefollowing is a false statement?

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Open pollinated populations are highly heterozygous

In breeding, depression is due to the harmful effects of dominant alleles

Heterosis is due to the masking of harmful effects of recessive alleles by their dominant alleles

Each locus of dominant alleles has a favorable effect.

Clear selection

In recombinant DNA technology, which enzyme is used to joinfragments that have been cut by restriction enzymes?

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Eco RI

DNA polymerase

DNA methylase

DNA ligase

Clear selection

The seed replacement rate of hybrid seeds is?

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40%

50%

100%

75%

Clear selection

The genetic gain under selection is more rapid if?

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the character is polygenic

there is non-additive gene

the alleles are rare

the heritability is 100 per cent

Clear selection

The temperature, pressure and time combination usually employed inautoclaving is?

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125 oC, 15 Ibs, 10-15 min

128o C, 20 lbs, 10-15 min

125 oC, 20 Ibs, 15-20 min

121o C, 15 ibs, 15-20 min

Clear selection

Which of the following checks the untimely sprouting of potato tubers?

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Abscisic acid

Ethylene

Gibberelin

) Maleic hydrazide

Clear selection

What is the total no. of anthers found in a rice floret?

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Clear selection

Which of the following bacterium is used as a biocontrol agent for thecontrol of Meloidogyne species?

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Agrobacterium

Rhizobium

Pasteuria

Erwinia

Clear selection

In term of ploidy, trisomy is a form of?

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hypoploidy

hyperploidy

polyploidy

diploidy

Clear selection

The hybrid progeny between a single cross and an inbred line isreferred to as?

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Three way cross hybrid

Double top cross hybrid

Double cross hybrid

Two way cross hybrid

Clear selection

When a disease becomes prevalent throughout the country continent or the world in a severe form, it is referred to as?

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Epidemic

Sporadic

Endemic

Pandemic

Clear selection

The tag colour of breeder seed is?

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opel green

white

blue

golden yellow

Clear selection

Green ear disease of Pearl millet is caused by?

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Tolyposporium penicillariae

Sclerospora graminicola

Claviceps microcephala

Curvulania penniseti

Clear selection

germinating mustard seed converts its lipid into sugar by?

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TCA

Calvin cycle

Glycolate pathway

Glyoxalate cycle

Clear selection

In which of the following situations, the enzyme RUBISCO plays dualfunction during photosynthesis, and produces either 3 phosphoglycericacid or glycolic acid?

0 points

In C3 plants when the CO2 concentration is higher than that of oxygen

In C3 plants when the oxygen concentration is higher than that of CO2

In C4 plants when oxygen concentration is higher than that of CO2

In CAM plants

Clear selection

Biologically, seed is a matured?

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ovary

ovule

fruit

capsule

Clear selection

4 In the seeds of most flowering plants, a triploid albuminous tissue is foundwhich is botanically described as?

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Seed coat

Cotyledon

Endosperm

Embryo

Clear selection

ldentify the Fungi which grow on dung?

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Corticolous

Option 2

Coprophillaus

Xyllophilous

Clear selection

Which of the following amino acids are aromatic in nature?

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Aspartic acid and glutamic acid

Proline and histidin

Option 3

Phenyl alanine and tyrosine

Clear selection

The type of germination in which seeds germinate by keepingcotyledons below the soil surface due to rapid elongation of epicotyle, isreferred to as?

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Epigeal

Hypogeal

Hypo-epigeal

Epi-hypogeal

Clear selection

The recent molecular technology which is used to determine the exactorder of the bases in a genome is?

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RNAi technology

PCR technique

DNA sequencing technique

DNA walking

Clear selection

The conversion of fixed forms of nitrogen to molecular nitrogen iscalled?

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Nitrogen fixation

Denitrification

Nitrification

Ammonification

Clear selection

II-stage of Purccinia graminis tritici produces?

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Teleutospores

Uredospores

Aeciospores

Pycniospores

Clear selection

Which bacterium is associated with preparation of Sauerkraut?

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Lactobacillus plantarum

Clostridium butyricum

Bacillus subtillis

Bacillus megaterium

Clear selection

Red leaf of cotton is caused due to deficiency of?

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Nitrogen

Boron

Calcium

Silicon

Clear selection

Castor oil falls under which of the following category of fixed oils?

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) Drying oil

Semidrying oil

Non-drying oil

Fats

Clear selection

Heterobeltios is is the superiority of F1 over?

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mean parent

popular check

better parents

commercial hybrids

Clear selection

A set of germplasm accession derived from base collection to represent thegenetic diversity in the whole collection is?

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Active collection

Reference set

Working collection

) Core collectio

Clear selection

If total no. of ‘n’ inbred lines are involved, then the total no. ofpossible synthetics is?

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N=2-2^n

N=2-2^n-n

N=2-2^n-2

N=2^n-n-1

Clear selection

Biological nitrogen fixation is the conversion of?

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N2 to NH3

N3 to Urea

N2 to N

N2 to NO3

Clear selection

The viable gametes produced by a translocation heterozygote is in?

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Adjacent

Alternate

Adjacent II

Adjacent I &II

Clear selection

Etiology is the study of?

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cause of disease

symptoms of diseas

predisposing factors for disease

management of disease

Clear selection

Cell wall of a bacteria is made up of?

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cellulose

chitin

peptidoglycan

dextran

Clear selection

XYZ system for hybrid production was proposed for?

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barley

rice

wheat

triticale

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