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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: 18006

#Unit 11. Evolution and Behavior

During which geological period origin, first forests; lands plants well established?
TLS Online TPP Program

#Question id: 18007

#Unit 11. Evolution and Behavior

The following geological eras mark the advent of important events in the history of earth- origin of first vertebrates armored fishes, origin of First reptiles, origin of first dinosaurs;
a) Triassic b) Pennsylvanian
c) Ordovician d) Cambrian

Identify the correct match of the events with the geological era;
TLS Online TPP Program

#Question id: 18008

#Unit 7. System Physiology – Animal

The perception of a stressor triggers this area of the brain to initiate the stress response.
TLS Online TPP Program

#Question id: 18009

#Unit 7. System Physiology – Animal

Fleeing from or confronting a threat is known as ______.
TLS Online TPP Program

#Question id: 18013

#Unit 13. Methods in Biology

Each of five questions on a multiple-choice examination has four choices, only one of which is correct. The student is attempting to guess the answers. The random variable X is the number of questions answer correctly. Probability that the student will get At least one correct answer.
TLS Online TPP Program

#Question id: 18014

#Unit 13. Methods in Biology

Each of five questions on a multiple-choice examination has four choices, only one of which is correct. The student is attempting to guess the answers. The random variable X is the number of questions answer correctly. Probability that the student will get Atmost three correct answers