Genetics And Plant Breeding - Study Mode

[#361] The 0.3% of DNA does not replicate during the S phase. This DNA replication occurs in
Correct Answer

(C) Zygotene

Explanation

Solution: The 0.3% of DNA does not replicate during the S phase. This DNA replication occurs in Zygotene. S phase (Synthesis Phase) is the phase of the cell cycle in which DNA is replicated, occurring between G 1 phase and G 2 phase. Since accurate duplication of the genome is critical to successful cell division, the processes that occur during S-phase are tightly regulated and widely conserved. Zygotene is the second stage of meiosis prophase-1 after the S phase, here uncoiling and condensing of chromosomes takes place. Also, the leftover DNA that does not replicate during S-phase, replicates in the zygotene phase.

[#362] Total number of DOS centre in India is
Correct Answer

(B) 43

Explanation

Solution: A total number of DOS centres in India is 43. The Department of Space is an Indian government department responsible for the administration of the Indian space program. It manages several agencies and institutes related to space exploration and space technologies. The Indian space program under the DoS aims to promote the development and application of space science and technology for the socio-economic benefit of the country.

[#363] Source of turgor in plant cells is
Correct Answer

(C) Water

Explanation

Solution: The Source of turgor in plant cells is Water. Turgor pressure is the force within the cell that pushes the plasma membrane against the cell wall. It is also called hydrostatic pressure and is defined as the pressure in a fluid measured at a certain point within itself when at equilibrium. Turgor pressure is caused by the osmotic flow of water and occurs in plants, fungi, and bacteria, thus, the source of turgor in plant cells is water.

[#364] Photorespiration is induced by
Correct Answer

(C) High O 2 content

Explanation

Solution: Photorespiration is induced by High O 2 content. Photorespiration refers to a process in plant metabolism where the enzyme RuBisCO oxygenates RuBP, wasting some of the energy produced by photosynthesis. This process is induced by a higher concentration of oxygen. RuBisCO enzyme catalyzes the carboxylation of RuBP during the first step of the Calvin cycle, functions as an oxygenase, and oxygen fixation is increased.

[#365] Who coined the term chromosome?
Correct Answer

(D) Waldeyer

Explanation

Solution: Waldeyer coined the term chromosome. He was a German anatomist, known for summarizing neuron theory and for naming the chromosome in 1888. A chromosome is a long DNA molecule with part or all of the genetic material of an organism. These chromosomes display a complex three-dimensional structure, which plays a significant role in transcriptional regulation.