Genetics And Plant Breeding - Study Mode
[#166] The outer membrane of mitochondria has
Correct Answer
(A) Porin
Explanation
Solution: The outer membrane of mitochondria has Porin . The outer mitochondrial membrane fully surrounds the inner membrane, with a small intermembrane space in between. The outer membrane has many protein-based pores that are big enough to allow the passage of ions and molecules as large as a small protein known as porins.
[#167] Which of the law explains the ratio obtained by crossing Rr × Rr?
Correct Answer
(A) Law of segregation
Explanation
Solution: The Law of segregation is the law that explains the ratio obtained by crossing Rr × Rr. The law of segregation states that each individual that is a diploid has a pair of alleles for a particular trait. Each parent passes an allele at random to their offspring resulting in a diploid organism. The allele that contains the dominant trait determines the phenotype of the offspring.
[#168] The process in which seeds are formed but embryo develops without fertilization is
Correct Answer
(A) Apomixis
Explanation
Solution: The process in which seeds are formed but an embryo develops without fertilization is Apomixis. Apomixis (asexual seed formation) is the result of a plant gaining the ability to bypass the most fundamental aspects of sexual reproduction: meiosis and fertilization. Without the need for male fertilization, the resulting seed germinates a plant that develops as a maternal clone.
[#169] End product of photosynthesis is
Correct Answer
(A) Starch
Explanation
Solution: The end product of photosynthesis is Starch. Photosynthesis is a process used by plants and other organisms to convert light energy into chemical energy that, through cellular respiration, can later be released to fuel the organism's activities. Starch is the primary product of photosynthesis. Starch represents the main plant storage carbohydrate that provides energy during heterotrophic growth.
[#170] The resulting two daughter cells produced by bridge-breakage fusion cycle will have
Correct Answer
(C) Both A and B
Explanation
Solution: The resulting two daughter cells produced by the bridge-breakage fusion cycle will have Both Duplication and Deficiency. Breakage-fusion-bridge (BFB) cycle is a mechanism of chromosomal instability, discovered by Barbara McClintock in the late 1930s. The BFB cycle begins when the end region of a chromosome, called its telomere, breaks off. When that chromosome subsequently replicates it forms two sister chromatids which both lack a telomere.