TLS Online TPP Program

#Question id: 19793


The specificity of cry protein seems to be lost upon reduction of which amino acid residues of the protoxin, but can be restored by reoxidation of these residues?

#Unit 12. Applied Biology
  1. Tryptophan
  2. Glutamate
  3. Cysteine
  4. Proline
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TLS Online TPP Program

#Question id: 7264

#Unit 5. Developmental Biology

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.

TLS Online TPP Program

#Question id: 4716

#Unit 11. Evolution and Behavior

Which of the following is correct match?

A

Wallace

I

Changes in allele frequency due

to random genetic drift

B

Sewall Wright

II

Evolution by natural selection

C

Carl Woese

III

hybrid sterility

D

Haldane’s rule

IV

DNA sequencing led to molecular phylogenetics

TLS Online TPP Program

#Question id: 2166

#Unit 2. Cellular Organization

Typical ion/ligand concentrations are

TLS Online TPP Program

#Question id: 24654

#Unit 2. Cellular Organization

Which of the following is not an example of an ion transporter?

TLS Online TPP Program

#Question id: 12582

#Unit 10. Ecological Principles

Which of  the  following  describes carbon dioxide,  methane, and  water  vapor re-reflecting infrared radiation back toward Earth?