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TLS Online TPP Program

#Question id: 7264

The Dictyostelia social amoebas are found in a wide range of soil habitats. They can come together to form a fruiting structure, in which a proportion of cells are sacrificed to build the stalk and the remainder differentiate into resilient dormant spores. This multicellular life cycle is common to all Dictyostelids. It consists of an interconnected programme of cell movement and cell differentiation, and has been intensively studied in the model organism D. discoideum. Few mutants (Column A) and phenotypes (Column B) are listed in the table given below.

    Column A

    Column B

A. Loss of function of cAMP-dependent protein kinase (PKA)

i. cell develop normally but unable to germinate

B. Loss of function of RegA

ii. Loose aggregate form

C. Loss of function of adenylate cyclase B

iii. No aggregation

D. Loss of function of gp80

iv. accumulation of cAMP and PKA activation

 Match the correct mutant with the observed phenotype.

#Unit 5. Developmental Biology
  1. A-iv, B-ii, C-iii, D-i
  2. A-iv, B-iii, C-i, D-ii
  3. A-ii, B-iii, C-iv, D-i
  4. A-iii, B-iv, C-i, D-ii
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TLS Online TPP Program

#Question id: 14857

#Unit 13. Methods in Biology

A man has 9 friends (4 men and 5 women). In how many ways can he invite them, if there have to be exactly 3 women in the invitees ?
TLS Online TPP Program

#Question id: 680

#Unit 1. Molecules and their Interaction Relevant to Biology

Super secondary structures that contain recognizable combinations of α-helices, β-strands and loops (e.g. the Greek Key) are called ________.
TLS Online TPP Program

#Question id: 11473

#Unit 7. System Physiology – Animal

Lateral inhibition via horizontal cells in the mammalian retina ________.
TLS Online TPP Program

#Question id: 6945

#Unit 5. Developmental Biology

The portion of the Drosophila body plan which will produce the wing is called
TLS Online TPP Program

#Question id: 5527

#Unit 5. Developmental Biology

Ectoderm cells related with anterior neural crest cells condense and form