Practice Questions

TLS Online TPP Program

#Question id: 4972

Fossils of Lystrosaurus, a dicynodont therapsid, are most common in parts of modern-day South America, South Africa, Madagascar, India, South Australia, and Antarctica. It apparently lived in arid regions, and was mostly herbivorous. It originated during the mid-Permian period, survived the Permian extinction, and dwindled by the late Triassic, though there is evidence of a relict population in Australia during the Cretaceous. The dicynodonts had two large tusks, extending down from their upper jaws; the tusks were not used for food gathering, and in some species were limited to males. Food was gathered using an otherwise toothless beak. Judging from the fossil record, these pig-sized organisms were the most common mammal-like reptiles of the Permian. Anatomically, what was true of Lystrosaurus?

#Unit 11. Evolution and Behavior

Its jaw would have been hinged the same way as the jaws of the early reptiles were hinged.
It was a tetrapod.
It had thin, moist skin without scales.
Its dentition (tooth pattern) was typical of modern mammals.

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#Question id: 26568

#Unit 3. Fundamental Processes

Hp1 oligomerisation tales place by

#Question id: 26569

#Unit 3. Fundamental Processes

#Question id: 26570

#Unit 3. Fundamental Processes

#Question id: 26571

#Unit 3. Fundamental Processes

Which of the following is required to initiate modifications of histone H3 (deacetylation of K9 and K14, followed by methylation of K9) in human

#Question id: 26572

#Unit 3. Fundamental Processes

Choose the following is incorrect statement about Polycomb or Pc-G proteins

a. Pc-G proteins do not initiate repression

b. Pc-G proteins initiate repression

c. They are responsible for maintainingrepression

d. There are Polycomb repressive complexes: PRC1 and PRC2

e. PRC2 complexes contain histone deacetylases that inhibit transcription

f. PRC1 complex binds the methylated nucleosomes

g. The PRC1 complex contains a ubiquitin ligase

#Question id: 26573

#Unit 3. Fundamental Processes