Genetics And Plant Breeding - Study Mode

[#116] The defective copies of normal genes are known as
Correct Answer

(D) Pseudo genes

Explanation

Solution: The defective copies of normal genes are known as Pseudo genes. A pseudogene is a segment of DNA that structurally resembles a gene but is not capable of coding for a protein. Pseudogenes are most often derived from genes that have lost their protein-coding ability due to accumulated mutations that have occurred throughout evolution.

[#117] Match the following columns: Column I (Institute) Column II (Established year) a. CPCRI 1. 1966 b. CTCRI 2. 1959 c. IASRI 3. 1970 d. IGFRI 4. 1963
Correct Answer

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

Explanation

Solution: a. CPCRI was established in the year 1970. Central Plantation Crops Research Institute (CPCRI) was established in 1970 as one of the agricultural research institutes at Kasaragod. b. CTCRI was established in the year 1963. Central Tuber Crops Research Institute, Thiruvananthapuram to create a Satellite Incubation Centre in the Industrial tapioca areas of Viluppuram and Namakkal districts. c. IASRI was established in 1959. Indian Agricultural Statistics Research Institute (IASRI) is a pioneer institute of ICAR undertaking research, teaching, and training in Agricultural Statistics, Computer Application and Bioinformatics. d. IGFRI was established in 1966. Indian Grassland and Fodder Research Institute aim to fulfill the needs of the nation and to conduct organized scientific research exclusively on grasslands and fodder production and their utilization.

[#118] Self splicing introns are found in
Correct Answer

(B) rRNA genes

Explanation

Solution: Self-splicing introns are found in rRNA genes. Self-splicing occurs for rare introns that form a ribozyme, performing the functions of the spliceosome by RNA alone. The Tetrahymena pre-rRNA self-splicing intron is shown to function in the unnatural context of an mRNA transcribed by RNA polymerase II in mammalian cells.

[#119] The organelle directly connected to the outer membrane of nucleus in an eukaryote cell is
Correct Answer

(C) ER

Explanation

Solution: The organelle directly connected to the outer membrane of the nucleus in a eukaryote cell is ER. The outer nuclear membrane is continuous with the endoplasmic reticulum, so the space between the inner and outer nuclear membranes is directly connected with the lumen of the endoplasmic reticulum.

[#120] Pigments which is responsible for skin colour?
Correct Answer

(B) Melanin

Explanation

Solution: Melanin is the Pigment that is responsible for skin colour. Melanin is a complex polymer that originates from the amino acid tyrosine. Melanin is present in human and animal skin to varying degrees and is responsible for your unique eye, hair and skin colour. Melanin is a substance in your body that produces hair, eye and skin pigmentation. The more melanin is produced, the darker the eyes, hair and skin will be.