487.After doing proper etching ,what is the ideal depth of the microtags formed.

a.0.5-5micrometres
b.5-50 micrometres
c.50-500 micrometres
d.500-5000 micrometres


Ans-b.5-50 micrometres

486.When estimating working length using paralleling technique radiograph,how much enlargement of image is allowed

a.1mm
b.2mm
c.3mm
d.None

Ans-b.2mm

485. Thiamine deficiency causes decreased energy production because

 a) It is required for the process of transamination.
 b) It is co-factor in oxidative reduction .
c)It is co-enzyme for transketolase in pentose phosphate pathway .
d) It is co-enzyme for pyruvate dehydrogenase.

Ans-d) It is co-enzyme for pyruvate dehydrogenase.