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Transcription continues until a termination series is reached. The most common termination signal is a GC-rich region which is a palindrome, followed by an AT-rich sequence. The RNA made from the DNA palindrome is self- complementary and so base pairs internally to form a hairpin structure rich in GC base pairs followed by four or more U residues shown in the figure. Though, not all termination sites have this hairpin structure. Those which lack such a structure require an additional protein, called rho (p), to help identify the termination site and stop transcription.
P A TTERNS OF CLEAVAGE - Patterns of cleavage depends upon amount of yolk & distribution of yolk. These are following types - 1 . RADIAL CLEAVAGE PATTERN -
Define Homogenization or Blending of Food Sample? Food homogenization - Liquid food samples are mixed manually before analyzing whereas solid foods are homogenized in a diluent
Determine the different types of sensory receptors There are different types of sensory receptors as follows: Visual receptors in the eyes for vision. Auditory receptor
Self- vs. Cross-Pollination A major advantage of self-pollination is its certainty. Continued self-pollination over many generations, however, results in weaker progeny. This
Q. What are the major events of the third mitotic period? The third mitotic period is anaphase. In anaphase the following events occur breaking and duplication of centromeres w
CIRCUL A T O R Y SYSTEM IN COCKROACH Type is open or lacunar. i.e. b.v. absent. Organs are dipped in haemolymph. 1 . HAEMOLYMPH - Blood and lymph are mixed.
High fibre diets High fibre diets: The patients are advised to eat high fibre cereals as whole grain flour and bread, whole grain bread cereals, whole wheat pasta and b
What are the two main classes into which fishes are divided? Fishes are separated into two main classes: chondrichthyes, fishes with cartilaginous skeletons (sharks, rays, dog-
What are the sign of Horner's syndrome? 1. Miosis, 2. ptosis, 3. enophthalmos, 4. anhidrosis and 5. heterochrome iridis.
What is the relation among fecundation and the end of the meiotic process during oogenesis? The oocyte II only completes the second meiotic division (interrupted at metaphase) i
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