Practice Questions

TLS Online TPP Program

#Question id: 2110

According to the fluid mosaic model of cell membranes, phospholipids:

#Unit 2. Cellular Organization

can move laterally along the plane of the membrane
frequently flip-flop from one side of the membrane to the other
occur in an uninterrupted bilayer, with membrane proteins restricted to the surface of the membrane
have hydrophilic tails in the interior of the membrane

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TLS Online TPP Program

#Question id: 4957

#Unit 11. Evolution and Behavior

How many half-lives should have elapsed if 6.25% of the parent isotope remains in a fossil at the time of analysis?

TLS Online TPP Program

#Question id: 28664

#Unit 2. Cellular Organization

DNA-bound G1 cohesins Convert into cohesive complexes by cohesin acetyl transferases (CoATs), that are involve to acetylation, which acetylate__

TLS Online TPP Program

#Question id: 30091

#Unit 2. Cellular Organization

Which is not true of transposable elements?

TLS Online TPP Program

#Question id: 28441

#Unit 5. Developmental Biology

Which of the following mechanism is involve to the primitive streak formation_____

a) epithelial-to-mesenchymal transformation

b) cellular dance mechanism

c) Wnt planar cell polarity pathway

e )Nonplanar cell polarity pathway

TLS Online TPP Program

#Question id: 902

#Unit 1. Molecules and their Interaction Relevant to Biology

Which demonstrates that the primary structure of a protein determines its tertiary structure?