#Question id: 47
#Unit 1. Molecules and their Interaction Relevant to Biology
If 30 J of energy is added to water in the form of heat at 27°C, what is the change in entropy of water?
#Question id: 7133
#Unit 5. Developmental Biology
In what way are mrf4, myoD, and the other muscle-inducing genes similar to the homeotic genes of Drosophila?
#Question id: 5382
#General Aptitude
The average of weight of 5 persons is decreased by 2 kg when one of the men whose weight is 50kg is replaced by a new man. The weight of the new man is.
#Question id: 2863
#Unit 2. Cellular Organization
The promoter of the araBAD operon from E. coli is activated in the presence of arabinose and the absence of glucose and directs expression of genes encoding enzymes required for arabinose metabolism. Unlike the cases of lac and gal genes, where a repressor and an activator work together, here two activators work together: AraC and CAP
|
+ arabinose |
AraC binds that sugar and adopts a configuration that allows it to bind DNA as a dimer to the adjacent half-sites, araI1 and araI2 |
|
– arabinose |
the AraC dimer adopts a different conformation and binds to araO2 and araI1, there is no monomer at site araI2, and so the protein cannot activate the araBAD promoter (araPBAD). This promoter is also controlled by CAP. |
#Question id: 33282
#Unit 2. Cellular Organization