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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.
a) Name two food additives needed to keep food wholesome, and say what they do. b) Name two food additives (or types of additive) which are not necessary for keeping fo
Vesicular stomatitis Vesicular sto matitis virus be longs to the ge nus Vesiculovirus in fa mily Rhabdoviridae. The disease clinically resembles foot-and-mouth disease, but is
Determine the Symptoms of Campylobacteriosis Symptoms: C. jejuni infection causes diarrhoea, which may be watery or sticky and can contain blood and faecal leukocytes (white
Grasping instruments -Plier or clamp forceps -put piece of rubber in the plier -applied on the buccal and lingual surface -make pressure to
What gum conditions may result from a failure to remove plaque? Gingivitis (gum inflammation) and periodontal disease (infection of the socket) might be result from a failure t
Vitamin C (Ascorbic acid) Vitamin C, ascorbic acid is also called anti-scorbutic vitamin. Ascorbic acid occurs as white crystals or white crystalline powder without odour and o
State two ways in which cardiac muscle is microscopically similar to skeleton muscle.
How is DNA replication related to cancer? Cancer can result when errors happen in the replication of DNA in genes that control how a cell divides. A mass of cancerous cells kno
DISORDERS OF UPPER RESPIRATORY TRACT: Common Cold: It is most frequent and most common infection in infants and children. Common cold corresponds to acute nasopharyn
Which are plant tissues that form the plant roots? Roots have a central portion called medulla made of vascular tissue outer phloem and inner xylem. Medulla is delimited by per
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