TLS Online TPP Program

#Question id: 15780


In drosophila, the somatic cells of the hub are able to regulate stem cell proliferation by secreting the paracrine factor Unpaired onto the cells attached to them. Unpaired activates the JAK-STAT pathway in the adjacent germ stem cells to specify their self-renewal. Those cells that are distant from the paracrine factor cannot receive this signal, they begin their differentiation into the sperm cell lineage. This means hub cells act as

#Unit 5. Developmental Biology
  1. Stem cell niches allow controlled self-renewal and also survival of the cells that leave the niche.
  2. Stem cell niches not allow controlled self-renewal but allow survival of the cells that leave the niche.
  3. Stem cell niches allow uncontrolled self-renewal and also division of the cells that leave the niche.
  4. Stem cell niches allow controlled self-renewal and regulate the ratio of cell division to differentiation.
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TLS Online TPP Program

#Question id: 3483

#Unit 11. Evolution and Behavior

Which of the following statements about evolution of behavior is correct?

A) Natural selection will favor behavior that enhances survival and reproduction.

B) An animal may show behavior that maximizes reproductive fitness.

C) If a behavior is less than optimal, it is not completely evolved but will eventually,become optimal.

TLS Online TPP Program

#Question id: 2253

#Unit 1. Molecules and their Interaction Relevant to Biology

Match the following lipid linked proteins (column I) with their function (Column II).

Column I

Column II

A. prenylated proteins

i. These proteins are located in a number of subcellular compartments, including the cytosol, the endoplasmic reticulum, the inner face of the plasma membrane, and the nucleus.

B. fatty acylated proteins

ii. The core structure of these proteins consists of phosphatidylinositol glycosidically linked to a linear tetrasaccharide composed of three mannose residues and one glucosaminyl residue.

C. glycosylphosphatidylinositol-linked proteins

iii. The proteins that have covalently attached lipids that are built from isoprene units

TLS Online TPP Program

#Question id: 2016

#Unit 4. Cell Communication and Cell Signaling

Most newly emerging diseases, no matter how severe their effects on a population, human or otherwise, have which of the following in common?

TLS Online TPP Program

#Question id: 6589

#General Aptitude


1

4

?

4

2

5

2

2

3

49

64

169

TLS Online TPP Program

#Question id: 33487

#Unit 2. Cellular Organization

Match the statements

A. In the fruit fly, gene sizes have a bimodal distribution

B.