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TLS Online TPP Program

#Question id: 760

Which force can stabilize a DNA double-helix?

#Unit 1. Molecules and their Interaction Relevant to Biology

  1. Hydrophobic bases are found in the interior of the helix where each base pair is stabilized by the same number of hydrogen bonds.

  2. Hydrophilic sugar-phosphate groups are found on the exterior of the helix where they can interact with water.

  3. Non-covalent N-glycosidic bonds can form between nitrogenous bases in opposite strands in the helix.

  4. Covalent base-stacking interactions can occur between adjacent bases within the same strand in the helix.

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TLS Online TPP Program

#Question id: 3437

#Unit 11. Evolution and Behavior

Learning in which an associated stimulus may be used to elicit the same behavioral response as the original sign stimulus is called
TLS Online TPP Program

#Question id: 7003

#Unit 5. Developmental Biology

What structural adaptation in chickens allows them to lay their eggs in arid environments rather than in water?
TLS Online TPP Program

#Question id: 6595

#General Aptitude

A

D

H

F

I

M

?

N

R

TLS Online TPP Program

#Question id: 535

#Unit 1. Molecules and their Interaction Relevant to Biology

In some diabetic patients, glucose increases disproportionately and is unresponsive to an insulin challenge; under these conditions, how would oneʹs liver normally respond?

A) phosphorylating glucose for entry into the glycolytic pathway

B) saturating glucokinase with glucose

C) phosphorylating glucose for entry into the glycogen synthesis pathways
TLS Online TPP Program

#Question id: 19095

#Unit 4. Cell Communication and Cell Signaling

Coronatine is a toxin effector produced by the bacterium Pseudomonas syringae. Coronatine is involved interfering which type of defense response?