(4) The attachment of the pyrimidine base to the ribose phosphate ring is catalyzed by orotate phosphoribosyl transferase (OPRT) and PRPP provides the ribose-5-phosphate moeity. Hydrolysis of the PP i that is split off of the PRPP makes this reaction irreversible.
Red Squirrels shed their coats twice a year, switching between a thinner coat in summer and a darker, thicker winter coat. 6. Males may live in an area of up to 17 hectares of woodland... thatâs about the same size as 34 football pitches! 7.
Turn on the lights. The kinds of moths that eat wool sweaters avoid light, so storing your clothing in a well-lit area (e.g., an attic with a window) will deter moths from living and breeding in your clothes.ave your wool sweaters cleaned before putting them up for the winter. Moths like to nest in the presence of organic materials. Body sweat and skin residue attract moths to your clothing. Disturb your wool sweaters on a monthly basis.