Protein Motifs and Domain Prediction MCQ

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In the zinc finger, which residues in this sequence motif form ligands to a zinc ion?

ক
Cysteine and histidine

খ
Cysteine and arginine

গ
Histidine and proline

ঘ
Histidine and arginine
Which of the following is not the function of Short Linear Motifs?

ক
Irreversible cleavage of the peptide at the SLiM

খ
Reversible cleavage of the peptide at the SLiM

গ
Moiety addition at targeted sites on SLiM

ঘ
Structural modifications of the peptide backbone
The protein structural motif domain- helix loop helix are contained by all of the following except ________

ক
Scleraxis

খ
Neurogenins

গ
Transcription Factor 4

ঘ
Leucine zipper
Which of the following wrongly describes protein domains?

ক
They are made up of one secondary structure

খ
Defined as independently foldable units

গ
They are stable structures as compared to motifs

ঘ
They are separated by linker regions
Motifs that can form α/β horseshoes conformation are rich with which protein residue?

ক
Proline

খ
Arginine

গ
Valine

ঘ
Leucine
Which of the following least describes Long Loop β-hairpins?

ক
They are Often referred to as a ‘random coil’ conformation

খ
Generally they are referred to as the β-meander supersecondary structure

গ
Loop looks similar to the Greek Letter Ω

ঘ
Wide-range of conformations with very specific sequence preferences
Which of the common structural motifs are described wrongly?

ক
β-hairpin – adjacent antiparallel strands

খ
Greek key – 4 adjacent antiparallel strand

গ
β-α-β – 2 parallel strands connected by helix

ঘ
β-α-β – 2 antiparallel strands connected by helix
Which of the following is false about the ‘loop’ structure in proteins?

ক
They connect helices and sheets

খ
They are more tolerant of mutations

গ
They are more flexible and can adopt multiple conformations

ঘ
They are never the components of active sites
On average, what is the length of a typical domain?

ক
About 100 residues

খ
About 300 residues

গ
About 500 residues

ঘ
About 900 residues
What is the length of a motif, in terms of amino acids residue?

ক
30- 60

খ
10- 20

গ
70- 90

ঘ
1- 10