Practice Questions

TLS Online TPP Program

#Question id: 736

The most important contribution to the stability of a protein’s conformation appears to be the:

#Unit 1. Molecules and their Interaction Relevant to Biology

entropy increase from the decrease in ordered water molecules forming a solvent shell around it.
maximum entropy increase from ionic interactions between the ionized amino acids in a protein.
sum of free energies of formation of many weak interactions among the hundreds of amino acids in a protein.
sum of free energies of formation of many weak interactions between its polar amino acids and surrounding water.

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TLS Online TPP Program

#Question id: 9239

#Unit 9. Diversity of Life Forms

Why are changes in the global carbon cycle important?

TLS Online TPP Program

#Question id: 12317

#Unit 10. Ecological Principles

You discover a rare new bird species, but you are unable to observe its mating behavior. You see that the male is large and ornamental compared with the female. On this basis, you can probably conclude that the species is

TLS Online TPP Program

#Question id: 3528

#Unit 8. Inheritance Biology

Consider the following cross:

A/a ; B/b ; C/c ; D/d ; E/e X a/a ; B/b ; c/c ; D/d ; e/e

What proportion of progeny will phenotypically resemble the first parent?

TLS Online TPP Program

#Question id: 2988

#Unit 2. Cellular Organization

Use the figure to answer the question below.

If the cell whose nuclear material is shown in the figure continues toward completion of mitosis, which of the following events would occur next?

TLS Online TPP Program

#Question id: 12716

#Unit 6. System Physiology – Plant

Some cis-elements of target genes, which are involved in the Signal perception of stress (Drought/salinity and cold) to activating tolerance,

These cis-elements are____