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Question
Lampbrush loops represent sites of intense RNA synthesis. This RNA is of which of the following type?
Lampbrush loops represent sites of intense RNA synthesis. This RNA is of which of the following type?
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Solution
The correct option is B mRNA
Lampbrush chromosomes are large sized diplotene chromosomes bivalents. A lampbrush chromosome is made up of two homologous chromosomes held at several places by chiasmata. Each chromosome has an axis with alternate chromomeres and inter chromomeric areas. Many of the chromomeres give out lateral loops of various sizes which are thin in the region of origin and thick in the area where they are wound back into the chromomeres. Loops are meant for rapid transcription and production of materials like yolk. Hence, lampbrush chromosomes occur in oocytes. The loops produce Informosomes (mRNA + proteins) for future development of the embryo.
So, the correct answer is option B.
Lampbrush chromosomes are large sized diplotene chromosomes bivalents. A lampbrush chromosome is made up of two homologous chromosomes held at several places by chiasmata. Each chromosome has an axis with alternate chromomeres and inter chromomeric areas. Many of the chromomeres give out lateral loops of various sizes which are thin in the region of origin and thick in the area where they are wound back into the chromomeres. Loops are meant for rapid transcription and production of materials like yolk. Hence, lampbrush chromosomes occur in oocytes. The loops produce Informosomes (mRNA + proteins) for future development of the embryo.
So, the correct answer is option B.
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