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TLS Online TPP Program

#Question id: 6961

Do HOX genes play a role in the development of C. elegans?

#5. Developmental Biology
  1. No, C. elegans does not have HOX genes
  2. No, C. elegans has HOX genes but none of them are used during development
  3. Yes, C. elegans has 4 clusters of HOX genes, just like mammals, that are required for specification of the identity of structures during embryogenesis
  4. Yes, but only one HOX gene is required in the embryo; the others provide positional identity in the larva
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TLS Online TPP Program

#Question id: 22955

#5. Developmental Biology

Based On ABC model during flower development, loss of class A activity results the formation of only stamen and carpel. Which of the flowering floral organs identity genes controls the class  A activity ?
TLS Online TPP Program

#Question id: 22956

#5. Developmental Biology

Individual and overlapping expression of homeotic genes in adjacent whorl of a flower determine the pattern of floral organ development. In an Arabidopsis mutant, floral organs are distributed as follows
WHORL 1 Sepal
WHORL 2 Petal
WHORL 3 Petal
WHORL 4 Sepal
Loss of function mutation in which one of the following genes would have caused the above pattern of floral organs development 
TLS Online TPP Program

#Question id: 22957

#5. Developmental Biology

floral organ development is controlled by overlapping expressions of A class , B class and C class genes in different whorls. In an Arabidopsis mutant, the floral whorls had following pattern:
Sepal àSepal àcarpel àcarpel 
Mutation in which one of the following class of gene causes above pattern.  
TLS Online TPP Program

#Question id: 22958

#5. Developmental Biology

Which of the following statement is correct regarding to the flower development in Arabidopsis?
TLS Online TPP Program

#Question id: 23140

#13. Methods in Biology

What will be the resolution of a compound microscope where numerical aperture given is 1.5 at 240 wavelength of light?
TLS Online TPP Program

#Question id: 23141

#13. Methods in Biology

Resolution of a light microscope is 0.42nm at 300 wavelength of light. If the specimen is viewed under oil what is the refractive index?