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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
  1. 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
  2. Yes, Drosophila also uses bmp-4 to specify ventral fates and chordin to specify dorsal fates
  3. Yes, the Drosophila dorsal protein is identical to the vertebrate bmp-4 protein, and specifies the ventral region of the embryo
  4. 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
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TLS Online TPP Program

#Question id: 29031

#Unit 11. Evolution and Behavior

A certain species shows where they live is not actively  defended, and a completely homogenous habitat where resources are distributed throughout that showing____
TLS Online TPP Program

#Question id: 15263

#Unit 2. Cellular Organization

Pure colonies also can be obtained from
TLS Online TPP Program

#Question id: 10206

#Unit 6. System Physiology – Plant

The excess energy is absorbed by three carotenoids molecules such as violaxanthin, antheraxanthin, and zeaxanthin, which of the following statements correct about these molecules?
TLS Online TPP Program

#Question id: 3957

#Unit 3. Fundamental Processes

In mammalian cells, the DNA of the centromere is characteristic of:
TLS Online TPP Program

#Question id: 18910

#Unit 13. Methods in Biology

is a lactose analog which is broken down by enzyme beta-galactosidase to give a product deep blue in colour.