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Doctors Medicines MCQs Q&A

Related Questions

Consider the following statements and choose the correct answer:
1. The structural genes direct the synthesis of cellular proteins through messenger RNA (mRNA)
2. The promoter gene determines whether or not the structural genes are to be repressed by the repressor
3. The regulator gene directs the synthesis of a protein which may be an active repressor or an inactive repressor
Lac repressor dissociates from its operator when the repressor binds to ____________
In a mero-diploid you have one I- and one I+ Repressor gene in the two lac operons. I+ is wild type while I- is a mutant which produces a repressor that doesn’t bind. What would be the functionality of the diploid?
A Lac repressor is a tetramer repressed when bound to the inducer. The trp repressor is a ____________________
The hydrolysis of lactose can be catalysed only by the enzyme lactase. Also, lactase is only able to work on lactose and no other compound.
Immobilised lactase is used to hydrolyse lactose in dairy waste to glucose and galactose. Enzyme is immobilised in resin particles and packed into a 0.5 m3 column. The total effectiveness factor for the system is close to unity; Km for the immobilised enzyme is 1.32 kg m-3; Vmax is 45 kg m-3 h-1. The lactose concentration in the feed stream is 9.5 kg m-3; a substrate conversion of 98% is required. The column is operated with plug flow for a total of 310 d per year. At what flow rate should the reactor be operated?
Low levels of the enzyme lactase may lead to lactose intolerance. Symptoms of lactose intolerance include ALL of the following EXCEPT?
The repressor for the β-galactosidase gene is encoded by ___________
The repressor protein is encoded by _________________
If "HABIT" is encoded as "TIBAH", what will be encoded from "CRAZY"?