Practice Questions

TLS Online TPP Program

#Question id: 2121

Which of the following membrane activities requires energy from ATP hydrolysis?

#Unit 2. Cellular Organization

facilitated diffusion of chloride ions across the membrane through a chloride channel
movement of Na+ ions from a lower concentration in a mammalian cell to a higher concentration in the extracellular fluid
movement of glucose molecules into a bacterial cell from a medium containing a higher concentration of glucose than inside the cell
movement of carbon dioxide out of a paramecium

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TLS Online TPP Program

#Question id: 33393

#Unit 1. Molecules and their Interaction Relevant to Biology

In case of Beta Hairpin

TLS Online TPP Program

#Question id: 33394

#Unit 1. Molecules and their Interaction Relevant to Biology

For Helix-turn-Helix, which of the following is correct

TLS Online TPP Program

#Question id: 33395

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following is correct for Zinc Finger Motif

a. Zinc atom stabilizes the structure / fold by coordination bonds.

b. Each motif contains about 30-50 amino acids.

c. Contains regular patterns of Cys / His, which coordinate with Zinc atom.

TLS Online TPP Program

#Question id: 33396

#Unit 1. Molecules and their Interaction Relevant to Biology

In case of Coiled-coils

a. Alpha-helices are packed together through the charged interactions only

b. They have heptad repeated sequences.

c. 3.6 aa / turn and 5.2A for a helix.

d. abcdefg 'a' &'d’ are hydrophobic residues 'e' and 'g' are found to be charged amino.

Which of the following is correct

TLS Online TPP Program

#Question id: 33397

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following characterises domains

a. Highly conversed and may be common in most unrelated proteins.

b. They do not evolve.

c. Can function Independently.

d. Average 100 amino acids.

e. Single hydrophobic core.

TLS Online TPP Program

#Question id: 33398

#Unit 1. Molecules and their Interaction Relevant to Biology

Immunoglobulin fold is characterised by