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TLS Online TPP Program

#Question id: 16323

Tastes and smells are distinct kinds of environmental information where ________.

#Unit 7. System Physiology – Animal
  1. neural projections from taste receptors reach different parts of the brain than the neural projections from olfactory receptors
  2. the single area of the cerebral cortex that receives smell and taste signals can distinguish tastes and smells by the pattern of action potentials received
  3. tastant molecules are airborne, whereas odorant molecules are dissolved in fluids
  4. distinguishing tastant molecules requires learning, whereas smell discrimination is an innate process
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TLS Online TPP Program

#Question id: 3427

#Unit 11. Evolution and Behavior

Natural selection can alter the frequency of distribution allele and heritable trait in different following way

A- Accumulation of those mutation that increase fitness of population in changing environment

B- Check accumulation of mutation that lower the fitness of species in unchanging environment

c- occur when population is subjected to divergent selection
TLS Online TPP Program

#Question id: 14739

#Unit 4. Cell Communication and Cell Signaling

In heart muscle, activation series of the muscarinic acetylcholine receptor its effector K+ channel via the Gβγ subunit of a Gi protein.
a. Binding of acetylcholine triggers activation of the Gαi subunit and its dissociation from the Gβγ subunit in the usual way. 
b. The released Gβγ subunit (rather than Gαi∙GTP) binds to and opens the associated effector protein, a K+ channel. 
b. The increase in K+ permeability hyperpolarizes the membrane, which reduces the frequency of heart muscle contraction. 
d. Activation is terminated when the GTP bound to Gαi is hydrolyzed (by a GAP enzyme that is an intrinsic part of the Gαi subunit) to GDP and Gαi∙GDP recombines with Gβγ.
TLS Online TPP Program

#Question id: 24143

#General Aptitude

DEPENDABLE : CAPRICIOUS
TLS Online TPP Program

#Question id: 11166

#Unit 2. Cellular Organization

Which of the following fatty acids are linked to membrane proteins?
TLS Online TPP Program

#Question id: 879

#Unit 1. Molecules and their Interaction Relevant to Biology

 Correct approaches to protein structure prediction-:

i. Homology modeling

a) Methods is the Rosetta program, formulated by David Baker. To satisfy the program’s computational needs, a volunteer network of ∼100,000 computers, known as Rosetta@home, provides the 500,000 or so hours of processing time required to generate a structure.

ii. Structural genomics

b) which seeks to determine the X-ray structures of all representative domains, is aimed at expanding this predictive technique. The identification of structural homology is likely to provide clues as to a protein’s function even with imperfect structure prediction.

iii. Threading

c) Is a computational technique that attempts to determine the unknown structure of a protein by ascertaining whether it is consistent with a known protein structure. It does so by placing the unknown protein’s residues along the backbone of a known protein structure and then determining whether the amino acid side chains of the unknown protein are stable in that arrangement

iv. Ab initio

d) Aligns the sequence of interest with the sequence of a homologous protein or domain of known structure—compensating for amino acid substitutions, insertions, and deletions—through modeling and energy minimization calculations.