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TLS Online TPP Program

#Question id: 7254

Following statements regarding to the micromeres specification and regulatory input  in sea urchin embryo. Which of the following statement is correct?

#Unit 5. Developmental Biology
  1. OTX is a general transcription factor, and β-catenin from the maternal cytoplasm is concentrated at the vegetal pole of the egg. These transcriptional regulators are inherited by the macromeres and activate the Pmar1 gene.
  2. Pmar1 encodes a repressor of HesC, which in turn encodes activator of several genes involved in micromere specification.
  3. In the veg2 cells, Pmar1 is not activated and the HesC gene product shuts down the non-skeletogenic genes.
  4. As soon as the micromeres form, maternal β-catenin and Otx activate the Blimp1 gene, whose product activates the Wnt8 gene. Wnt8 protein is then received by the same micromeres that made it (i.e., autocrine regulation), activating the micromeres’ own genes for β-catenin.
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TLS Online TPP Program

#Question id: 18007

#Unit 9. Evolution & Diversity of Life Forms

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 14. 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 14. 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
TLS Online TPP Program

#Question id: 18072

#Unit 9. Evolution & Diversity of Life Forms

First invertebrates insects fossil appeared in which of the following geological ages?
a) Mesozoic b) Jurassic
c) Paleozoic d) Devonian
e) Permian f) Pennsylvanian
Which of the following combinations give the best answer?