List of top Plant Sciences Questions

Fixation of heterosis can NOT be achieved by -
Which one of the following is NOT a component of heat stress tolerance in crop plants ?
If an autosomal recessive disorder, which shows Hardy-Weinberg equilibrium, has an incidence of 1 in 6400, then the frequency of a carrier is approximately -
The following genotypes are found in a population: AA/35, Aa/25, and aa/10. What are the allele frequencies of A and a ?
If the frequency of males affected with an X-linked recessive allele in a human population is 0.10 (1 in 10), what will be the expected frequency of affected females ?
If you have 5 nucleotides, say A, T, G, C and X, how many triplet codons you could have formed from it ?
An example of 'primary introduction' of crop varieties in plant breeding in India is -
Which one of the following is NOT a path of genetic information flow as per the modern Central Dogma of Biology ?
A nonsense mutation involves the creation of a an -
Along with JD Watson, Francis Crick and Maurice Wilkins, Rosalind Franklin also contributed significantly towards the development of double helical structure of the DNA. All but Rosalind Franklin was awarded with the Nobel Prize. The reason for not awarding Nobel Prize to Roslind Franklin was -
Arrange the following classes of seeds in ascending order of their genetic purity percentage:
A. Certified seed
B. Breeder seed
C. Foundation seed
D. Nucleus seed
Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A : DNA polymerase can synthesize DNA in the 5' to 3' direction.
Reason R : DNA polymerase can synthesize DNA in the 3' to 5' direction.

In light of the above statements, choose the correct answer from the options given below:
Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A: The mode of DNA replication is semi-conservative in nature.
Reason R: One of the DNA strands is synthesized continuously, while the other is synthesized discontinuously.

In light of the above statements, choose the most appropriate answer from the options given below:
Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A: India is the largest producer of potato in the world.
Reason R: The states Uttar Pradesh, West Bengal and Punjab account for majority of potato production in India.

In light of the above statements, choose the correct answer from the options given below:
The inflorescence of rice is called:
In molecular marker technologies, the acronym RFLP stands for:
Which of the following amino acids initiates protein synthesis in all organisms?
Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A: Dioecy ensures that outbreeding will always occur.
Reason R: In dioecy, male and female flowers are present on different parts of the same plant.

In light of the above statements, choose the most appropriate answer from the options given below:
Arrange the following parts of Wheat (Triticum aestivum L.) in descending order with respect to their chromosome number:
A. Endosperm
B. Male gamete
C. Embryo
Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A: CAM plants are present in dry and arid environments.
Reason R: The CAM pathway is adapted to minimize water loss and photorespiration.

In light of the above statements, choose the most appropriate answer from the options given below:
Which one is incorrect with respect to transpiration in plants?
The Prime Minister of India dedicated 35 climate-resilient crop varieties developed by ICAR, State & Central Agricultural Universities in September 20 The list of these 35 varieties includes which of the following crop groups?
Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A : Inbreeding depression is the reduced survival and fertility of offspring of related individuals.
Reason R : Inbreeding increases heterozygosity exposing harmful recessive alleles in homozygotes.

In light of the above statements, choose the correct answer from the options given below:
Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A : ICAR‐Indian Institute of Sugarcane Research is located at Coimbatore.
Reason R : ICAR‐National Bureau of Plant Genetic Resources is located at New Delhi.

In light of the above statements, choose the correct answer from the options given below:
Arrange in descending order the following soil types of India according to their area of predominance:
A. Alluvial soils
B. Red soils
C. Laterite soils
D. Black soils