Practice Questions

TLS Online TPP Program

#Question id: 7271

In drosophila, Head formation required higher Bicoid concentrations than thorax formation, because

#Unit 5. Developmental Biology

The promoters of such head specific genes would have high-affinity binding sites for Bicoid protein, causing them to be activated only at extremely high concentrations of Bicoid.
The promoters of such head specific genes would have low-affinity binding sites for Bicoid protein, causing them to be activated only at extremely high concentrations of Bicoid.
The promoters of such head specific genes would have high- affinity binding sites for bicoid protein, causing them to be activated only at extremely low concentratrations of bicoid.
The promoters of such head specific genes would have low-affinity binding sites for Bicoid protein, causing them to be activated only at extremely low concentrations of Bicoid.

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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