JRF Plant Science Paper 2020

The scientific name of Oil palm is?

Which of the following statements is NOT true for Koch’s postulates?
1. A specific organism can always be found in association with a given disease
2. The organism can be isolated from a diseased animal and grown in pure culture in the laboratory
3. The pure culture will produce the disease when inoculated into a resistant animal
4. The pure culture will not produce the disease when inoculated into a susceptible animal
5. It is possible to recover the organism in pure culture from the experimentally infected animal
Choose the correct answer from the options given below:

How many linkage groups are present in maize (Zea mays L)?

Given below are two statements:
Statement I: Xanthomonas causes disease on fiber plant parts
Statement II: Xanthomonas can cause vascular wilt in rice
In light of the above statements, choose the most appropriate answer from the options given below:

Which one of the following bacterial pathogenic genus is classified under Gram-negative aerobic and microaerophilic rods?

The gene A-B-D is present in one chromosome in the coupling phase of linkage. One of the double cross-Over gametes has A-b-D gene combination.
The gene which was in the middle of the sequence is?

The degree of compost maturity can be assessed by?

Conjugation between two bacteria is mediated through?

Which of the statements below do NOT stand true about the ‘Convention on Biological Diversity (CBD)?
1. CBD deals with all biological resources
2. One of the objectives of CBD is the conservation and sustainable use of the component of biodiversity
3. The CBD affirms the sovereign rights of the nation over its genetic resources
4. CBD is an instrument for harmonizing phytosanitary measures in international trade
5. CBD provides a model for securing protection for plant breeder rights for plant varieties

Maximum assimilation of nitrate takes place in which part of the plant?

Match List I with List ll

Choose the correct answer from the options given below:

Which of the following statements are correct with respect to fibers or fiber-yielding plants?
1. Vegetable fibres are mainly composed of cellulose
2. Vegetable fibres are mainly composed of proteins
3. Fibre durability is conditioned by the diameter of the fiber or fibrous aggregate
4. The flexible wall of cotton fiber contains no lignin
Choose the correct answer from the options given below:

The purity standard of certified seeds of carrot is?

Match List I with List lI
           

Choose the correct answer from the options given below

Cell theory was put forward by?

Given below are two statements?
Statement I: Nitrogenase enzyme is sensitive to molecular oxygen
Statement II: Bacteria of genus Azospirillum fix nitrogen under microaerophilic conditions
In the light of the above statements, choose the most appropriate answer from the options are given below

Which one of the following is NOT an introduced variety of wheat crop? 

The first product to be tagged with GI in India is?

Translocation of carbohydrates in plants usually occurs in the form of?

When two self-incompatible but cross-compatible parental lines are inter-planted, the seeds harvested from both the self-incompatible lines will be?

Match List I with List II

Choose the correct answer from the options given below:

Toxic shock syndrome, a severe infection characterized by high fever and vomiting is caused by?

Match List I with List II
 

Choose the correct answer from the options given below:

Given below are two statements:
Statement I: Potato is essentially a crop of cool moist regions and grows best in a climate where cool nights alternate with warm days during the period of tuber formation

Statement II: Irrigation or rainfall at or just before the initiation of tuber the formation will result in a decrease in the number of tuber sets
In the light of the above statements, choose the most appropriate answer from the options given below

The yield of inbred A is 40 a/ha, inbred B is 20 q/ha, check hybrid yield is 45 a/ha and the yield of hybrid (A x B) is 50 q/ha. The standard heterosis (%) is?

Given below are two statements?
Statement I: Higher the degree of cross-pollination in crops, the more will be the isolation distance requirement
Statement ll: self-pollinated crops need more isolation distance like cross-pollinated crops
In light of the above statements, choose the most appropriate answer from the options are given below

The National Genebank Facility to conserve plant genetic resources in India is located at?

The minimum standard of seed germination (%) for seed certification in maize is?

Which of the following is NOT a non-sense codon?

Certain plant pathogens do not live at the site of the symptom or symptomatic plant niche?
1. They only transfer virulent factors to host
2. Plant attracts the virulence factors by its chemical signals
3. This kind of pathogen survive in the rhizosphere of the infected plant
4. Virulence factors can be cultured on media
5. Infected plant can be recovered with time

The tag for Breeders Seed is issued by?

With regard to the cultivation of groundnut, which of the following statements are correct?
1. Groundnut is a warm-season crop requiring abundant sunshine
2. Well-drained sandy loams are most favorable for growing groundnut
3. Groundnut is propagated through whole pods, decorticated seeds or from seedlings
4. Groundnut is widely grown in coastal and deltaic regions
5. Groundnut takes six to nine months to mature
Choose the correct answer from the options given below:

The seed dormancy can be detected by?

Given below are two statements:
Statement I: Leaf curl is one of the symptoms of viral disease
Statement II: Fungi can also cause leaf curl symptoms
In light of the above statements, choose the most appropriate answer from the options given below:

At the minimum, how many years of multi-location testing is required for a conventionally bred genotype to be released as a new variety?

Given below are two statements:
Statement I: Witches broom symptoms are caused by phytoplasmas
Statement II: Nutrient deficiency also causes witches broom in crop plants
In light of the above statements, choose the most appropriate answer from the options given below:

Naked asci can be observed in which ascomycete fungus?

In which of the following seed storage conditions, the longevity of the seeds would be maximum?

Given below are two statements?
Statement I: Cleistogamy and chasmogamy favor self-fertilization
Statement II: Male sterility and self-incompatibility do not favor cross-fertilization
In light of the above statements, choose the most appropriate answer from the options are given below:

Given below are two statements:
Statement I: When one dominant allele of one gene and recessive allele of another gene are present on one chromosome and their opposite alleles are present on the homologous chromosome, the arrangement is called Cisheterozygote

Statement II: When the dominant alleles of two genes are present on one chromosome and their corresponding recessive alleles are present on the homologous chromosome, the arrangement is called Cis-heterozygote
In the light of the above statements, choose the most appropriate answer from the options given below:

Which of the following listed items does not come under the purview of the National Plant Protection Organization (NPPO) under the International Plant Protection Convention (IPPC)?
1. Surveillance and inspection
2. Controlling pests (for example administering treatments, preventing spread, disinfection or disinfestation)
3. Conduction of pest risk analysis
4. Conservation and regeneration of plant genetic resources
5. Multiplication of plant genetic resources
Choose the correct answer from the options given below

Which one of the following viruses is transmitted by pollen?

An organism has a haploid chromosome number 7. The probability that a sperm produced by it will contain all the 7 chromosomes whose centromeres were derived from the maternal homologue is?

Cell wall of archaebacteria do not contain?

Arrange these Conventions and Treaties in ascending order of year they entered into force?
A. World Trade Organization-Trade Related Aspect of Intellectual Property Rights (WTO-TRIPS)
B. Convention on Biological Diversity (CBD)
C. Nagoya Protocol on Access and Benefit Sharing (NP)
D. Geographical Indication of Goods (Registration and Protection, GI Act
E. International Treaty on Plant Genetic Resources for Food and Agriculture (ITPGRFA)

Match ListI with List-II:

Choose the correct answer from the options given below:

Given below are two statements?
Statement I: Spatial and temporal transmission of plant pathogens are in general guided by asexual and sexual spores
Statement II: Bacterial pathogens produce asexual cells
In the light of the above statements, choose the most appropriate answer from the options given below

Vertical resistance is useful in crop improvement program for importing resistance?
1. Because of their monogenic nature
2. Because of their polygenic nature
3. The pathogen can break their resistance by evolving new race
4. The pathogen cannot break this resistance
5. Vertical resistance will work against biotrophic pathogens
Choose the correct answer from the options given below:

Given below are two statements?
Statement I: The process of CTC in tea stands for Crushing, Tearing, and Curling
Statement II: The process of CTC in tea stands for Curling, Tearing, and Crushing
In the light of the above statements, choose the most appropriate answer from the options given below

Which one of the following species has an inflorescence of terminal digitate spikes of spikelets?

Zein, a special kind of protein is obtained from?

The hormone needed for cell division during germination of seed is?

The isolation distance required for the production of certified seeds of maize composite variety is?

Irradiation by UV light causes?

Match List I with List II?

Who among the following scientist is considered as Father of Green Revolution in India’?

The genome of Triticale is designated as?

End product of Glycolysis is?

Identify the correct order of activities followed for testing and release of crop varieties?
1. Multi-location testing
2. Station trial
3. Variety identification
4. Release and notification
5. seed multiplication and distribution
Choose the correct answer from the options given below:

Given below are two statements:
Statement I: Light reaction takes place in the stroma
Statement II: Dark reaction takes place in grana
In light of the above statements, choose the most appropriate answer from the options given below