Genetics And Plant Breeding - Study Mode

[#276] Pressure exerted by the cell wall is known as
Correct Answer

(D) Wall pressure

Explanation

Solution: The pressure exerted by the cell wall is known as Wall pressure. The pressure exerted on the contents of a plant cell by the cell wall is equal in force and opposite in direction to the turgor pressure. Turgor pressure acts on the cell wall. Cell wall pressure is generated by the cell wall.

[#277] Match the following columns: Column I (Institute) Column II (Location) a. IARI 1. New Delhi b. VPKAS 2. New Delhi c. NBPGR 3. Almora (UA) d. CSSRI 4. Karnal (Haryana)
Correct Answer

(C) a-1, b-3, c-2, d-4

Explanation

Solution: a. The Indian Agricultural Research Institute (IARI), commonly known as the Pusa Institute, is India's national institute for agricultural research, education, and extension. It was relocated to Delhi in 1936. b. VPKAS is Vivekananda Parvatiya Krishi Anusandhan Sansthan and is located in Almora. Basic, strategic and adaptive research for improving productivity and quality of important hill crops with emphasis on conservation and efficient utilization of natural resources. c. NBPGR National Bureau of Plant Genetic Resources (NBPGR) has its headquarters in New Delhi. The NBPGR played a pivotal role in the improvement of various crop plants and the diversification and development of agriculture in India. d. CSSRI is Central Soil Salinity Research Institute and is located in Karnal, Haryana. It Conducts basic and advanced research on the reclamation and management of salt-affected soils and the development of suitable agrochemical, biological and hydraulic technologies for the use of irrigation water for the development of various agroecological zones for sustainable production.

[#278] DNA can be denatured by heating at a gene in temperature of
Correct Answer

(A) 94°C

Explanation

Solution: DNA can be denatured by heating a gene at a temperature of 94°C. DNA can be denatured through the heat in a process that is very similar to melting. Heat is applied until the DNA has unwound itself and separated into two single strands. This initial denaturation step usually occurs at around 94°C, depending on the specific polymerase involved. To fully denature the DNA, initial denaturation can take up to 2 minutes.

[#279] If the gametic composition of a genotype is AbC, Abc, abc, abC, in equal proportion, the genotype of the source individual is
Correct Answer

(C) AabbCc

Explanation

Solution: If the gametic composition of a genotype is AbC, Abc, abc, abC, in equal proportion, the genotype of the source individual is AabbCc. As genetic composition of offsprings are AbC, Abc, abc, abC, that is A and C are both recessive and dominant, but b is all recessive, that makes it AabbCc.

[#280] DNA as a genetic element' was shown by the experiment of
Correct Answer

(A) Avery, Macleod and McCarty

Explanation

Solution: DNA as a genetic element' was shown by the experiment of Avery, Macleod, and McCarty. Oswald Avery, Colin MacLeod, and Maclyn McCarty showed that DNA (not proteins) can transform the properties of cells, clarifying the chemical nature of genes. Avery, MacLeod and McCarty identified DNA as the "transforming principle" while studying Streptococcus pneumoniae, bacteria that can cause pneumonia.