Practice Questions

TLS Online TPP Program

#Question id: 807

Which of the following forces can stabilize a normal DNA double-helix?

#Unit 1. Molecules and their Interaction Relevant to Biology

Base-stacking is a non-covalent interaction that occurs between the relatively hydrophobic bases in the interior of the helix.
Base-pairing is a non-covalent interaction that occurs between adjacent bases in the same strand of the DNA molecule.
The hydrophilic sugar-phosphate groups are on the exterior of the helix where they can interact with each other.
The deoxyribose rings form N-glycosidic bonds with the phosphate groups that link neighboring nucleotides.

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TLS Online TPP Program

#Question id: 24233

#Unit 4. Cell Communication and Cell Signaling

Epithelial-to-mesenchymal transition is associated with a reduction in the expression of;

TLS Online TPP Program

#Question id: 13222

#Unit 6. System Physiology – Plant

More mature regions of the root often have an outer layer of protective tissue, called an

TLS Online TPP Program

#Question id: 22969

#Unit 7. System Physiology – Animal

Glucocorticoids promote osteoclast activity and bone resorption by;

a. Decreasing RANKL production

b. Decreasing formation of OPG

c. Increasing RANKL production

d. Increasing formation of OPG

TLS Online TPP Program

#Question id: 11016

#Unit 7. System Physiology – Animal

A ventricular depolarization wave when traveling −90° in the frontal plane will cause a large negative deflection in which lead?

TLS Online TPP Program

#Question id: 24029

#General Aptitude

The total number of members in the Press Council of India are: