Directions : In the following question more than one of the answers given may be correct. Select the correct answer and mark it according to the code:
Heterochro matin (1) contains a highly repetitice sequence of DNA (2) is the inert segment of the chromosome adjacent to the centromere (3) is tightly coiled during the in terphase (4) lightly stained regionsA) 1, 2 and 3 are correct
B) 1 and 2 are correct
C) 2 and 4 are correct
D) 1 and 3 are correct
Correct Answer: A
Solution :
Heterochromadn (i) Is composed of 250Å fibres (ii) Is found in the condensed region of chromosomes and is associated with tight folding and coiling of chromosome. (iii) Contains highly repetitive sequence of DNA (iv) Is genetically inert (ie, does not have the capacity of transcription) (v) Stains deeply in interphase
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