List of top Plant Sciences Questions

In maize, the opaque 2 mutants are found to have some of the following quality parameters. Identify -
Match List I with List II
List I (Phytochemical):
A. BOAA
B. Erusic acid
C. Gossypol
D. Linolenic acid
List II (Plant species):
I. Brassica species
II. Flax or Linseed
III. Lathyrus
IV. Cotton
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Sclerotia of Claviceps purpurea responsible for the infamous St. Anthony's Fire is believed to contain
Match List I with List II
List I (Terminology):
A. Double monosomy
B. Trisomy
C. Nullisomy
D. Double tetrasomy
List II (Genetical formula):
I. 2N+2+2
II. 2N-2
III. 2N-1-1
IV. 2N+1
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Match List I with List II
List I (Parameter):
A. Germplasm conservation
B. Clonal degeneration
C. DMSO
D. Virus elimination
List II (Activity):
I. Virus infection, mutation
II. Cryoprotectant
III. Cryotherapy
IV. In-situ, ex-situ, cryopreservation
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Match List I with List II
List I (Terminology):
A. Hybrid
B. Pure line variety
C. Composite variety
D. Synthetic variety
List II (Description):
I. A variety produced by mixing the seeds of several phenotypically outstanding lines not tested for GCA.
II. A variety developed by intercrossing a number of genotypes of known superior combining ability.
III. First generation cross product has grown commercially.
IV. Progeny of a single, self-fertilized, homozygous plant.
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The C4 plants usually have the following features -
A. The first stable product in the system is a 4-carbon compound
B. There are two CO2 acceptors, viz., PEP and RUBP
C. Oxygen does not have any inhibitory effect on the process.
D. RUBP carboxylase is present in the mesophyll.
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Match List I with List II
List I (Micropropagation propagules):
A. Protocorms
B. Bulblets
C. Somatic embryos
D. Adventitious shoot buds
List II (Crops):
I. Oil palm
II. Orchids
III. Begonia
IV. Lily
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Match List I with List II
List I (Process):
A. Anther culture
B. Asymmetric hybrid
C. Analytical breeding
D. Actinomycin D
List II (Results/Related to):
I. Virus elimination
II. Gamatoclonal variation
III. Chromosome elimination
IV. Ploidy manipulation
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Match List I with List II
List I (Compound):
A. Benzyl alcohol
B. Silica content
C. Asparagine content
D. Sinigrin content
List II (Target/Related insect-pests):
I. Brown plant hopper
II. Green bugs
III. Cabbage aphid
IV. Rice stem borer
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The process of mitosis in a cell consists of a series of events as given below. Arrange the events in order from first to the last as per the time of occurrence
A. The highly condensed chromosomes move to the equatorial plate of the spindle
B. The centromere interacts with the spindle fiber apparatus
C. Division of the cytoplast
D. Sister chromatids move apart to the oppositive poles
E. The nuclear membrane breaks down and the spindle-shaped structure of microtubules is organized
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Which of the following constitutes 'genetic emasculation'?
A. Genetic male sterility
B. Transgenic male sterility
C. Cytoplasmic-genetic male sterility
D. Chemical hybridizing agent
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The use of synthetic varieties is more beneficial than single-cross or double-cross hybrids. The reasons are-
A. Yield of synthetic varieties is higher than hybrids
B. Farmers can save their own produce as seeds and no need to buy new seeds every year
C. Synthetic varieties have wider adaptability than hybrids
D. No need to make fresh crosses every year to produce seeds
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In seed technology, the term 'dockage' is commonly used to describe-
In maize, the diploid chromosome number (2n) is 20. The number of chromosomes in endosperm cell (EC), pollen mother cell (PMC), pollen tube nucleus (PTN), and root tip cells (RTC) will be-
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The formation of a loop during the pachytene stage of meiosis indicates occurrence of -
A: Translocation
B: Deficiency
C: Inversion
D: Duplication
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Suppose, you wish to combine the mitochondria from species A with the chloroplast and nucleus of species B. Which of the following techniques is highly suited to achieve the objective?
An 'artificial seed' consists of gel enclosing one of the following components. Which one?
The test cross ratio for a trait governed by two genes with masking gene action will be-
Which one of the following characteristics is NOT true for 'genetic drift'?
For hybridization, in which of the following crops, the florets are clipped at the top to expose the anthers?
The onion we consume is a-
If Meselson and Stahl's experiment on the mode of DNA replication is continued up to the sixth generation in bacteria, the ratio of Heavy strands 15N/15N: Hybrid15N/14N: light strand 14N/14N containing DNA in the sixth generation would be-
As per the general model, the order of the activities in the DNA replication in E coli from the beginning to the end is:
A. Enzyme ‘primase’ synthesizes the ‘primer RNA’
B. Single-strand binding (SSB) proteins bind to the separated single strands and stabilize them.
C. DNA gyrase and DNA helicase unwind the complementary strands of DNA in the origin of replication (Ori C).
D. After digesting the RNA primers, the ‘Okazaki fragments' are joined together by the enzyme ‘ligase’.
E. Synthesis of DNA starts and goes continuously in the ‘leading strand’ and discontinuously in the ‘lagging strand’
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Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A: University Education Commission (1948-49) recommended the establishment of Rural Universities in India
Reason R: In 1960, the 1st Agricultural University was established in India in the pattern of the Land-Grant Universities of the USA.
In light of the above statements, choose the correct answer from the options given below: