Practice Questions

TLS Online TPP Program

#Question id: 760

Which force can stabilize a DNA double-helix?

#1. Molecules and their Interaction Relevant to Biology

Hydrophobic bases are found in the interior of the helix where each base pair is stabilized by the same number of hydrogen bonds.
Hydrophilic sugar-phosphate groups are found on the exterior of the helix where they can interact with water.
Non-covalent N-glycosidic bonds can form between nitrogenous bases in opposite strands in the helix.
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: 2102

#2. Cellular Organization

In which of the following environments would there be the greatest need for osmoregulation?

TLS Online TPP Program

#Question id: 5066

#5. Developmental Biology

The mutations of RAS that make it oncogenic by

TLS Online TPP Program

#Question id: 4917

#8. Inheritance Biology

Cytoplasmic male sterility in maize is manifestation of interaction between

TLS Online TPP Program

#Question id: 10405

#6. System Physiology – Plant

In some cases phytochrome itself moves to the nucleus in a light-dependent manner. Detection of this movement relied on the ability to fuse phytochrome with,

TLS Online TPP Program

#Question id: 345

#1. Molecules and their Interaction Relevant to Biology

As the [H₃O⁺] of the solution decreases, the [OH-] ________.