Practice Questions

TLS Online TPP Program

#Question id: 7248

Planning of the Xenopus mesoderm along the dorso-ventral axis contains an antagonistic relationship between chordin and bmp-4. Is there an analogy here to dorso-ventral patterning in the Drosophila embryo?

#Unit 5. Developmental Biology

Yes, the Drosophila homolog of Bmp-4, decapentaplegic (DPP), is antagonized by the Drosophila homolog of chordin, short gastrulation (SOG), in patterning of the dorso-ventral axis
Yes, Drosophila also uses bmp-4 to specify ventral fates and chordin to specify dorsal fates
Yes, the Drosophila dorsal protein is identical to the vertebrate bmp-4 protein, and specifies the ventral region of the embryo
No. The closest analogy from Drosophila would be the antagonism between hunchback and nanos, but neither of those is signalling molecules, and they act to pattern the antero-posterior axis

More Questions

TLS Online TPP Program

#Question id: 29503

#Unit 6. System Physiology – Plant

Trichomes of nettles (Urtica dioica) have “cocktail” of secondary metabolites that can cause severe irritation of the skin of animals which are

a. Tartaric acid

Which of the following combination secondary metabolites is true

TLS Online TPP Program

#Question id: 31414

#Unit 4. Cell Communication and Cell Signaling

Which one of the following options represents the correct match between the proteins (Column X) and related processes(Column Y)?

TLS Online TPP Program

#Question id: 11003

#Unit 7. System Physiology – Animal

Which of the following statements about cardiac muscle is most accurate?

TLS Online TPP Program

#Question id: 1154

#Unit 4. Cell Communication and Cell Signaling

Which of the following events do not occur during the epinephrine-stimulated conversion of glycogen to glucose-1-phosphate?

TLS Online TPP Program

#Question id: 23055

#Unit 12. Applied Biology

In cell lines normal tissues and are themselves non-tumorigenic, such as MDCK dog kidney, 3T3 fibroblasts, these are an example of___