Questions and answers for exam Preparation

MCQs

Total Questions : 150 | Page 12 of 15 pages

Question 111. Motifs that can form α/β horseshoes conformation are rich with which protein residue?

Proline
Arginine
Valine
Leucine

Discuss Question

Answer: Option D. -> Leucine
Answer: (d).Leucine

Question 112. Which of the following wrongly describes protein domains?

They are made up of one secondary structure
Defined as independently foldable units
They are stable structures as compared to motifs
They are separated by linker regions

Discuss Question

Answer: Option A. -> They are made up of one secondary structure
Answer: (a).They are made up of one secondary structure

Question 113. Which of the following is not the function of Short Linear Motifs?

Irreversible cleavage of the peptide at the SLiM
Reversible cleavage of the peptide at the SLiM
Moiety addition at targeted sites on SLiM
Structural modifications of the peptide backbone

Discuss Question

Answer: Option A. -> Irreversible cleavage of the peptide at the SLiM
Answer: (a).Irreversible cleavage of the peptide at the SLiM

Question 114. The protein structural motif domain- helix loop helix are contained by all of the following except ________

Scleraxis
Neurogenins
Transcription Factor 4
Leucine zipper

Discuss Question

Answer: Option D. -> Leucine zipper
Answer: (d).Leucine zipper

Question 115. In the zinc finger, which residues in this sequence motif form ligands to a zinc ion?

Cysteine and histidine
Cysteine and arginine
Histidine and proline
Histidine and arginine

Discuss Question

Answer: Option A. -> Cysteine and histidine
Answer: (a).Cysteine and histidine

Question 116. On analysis of the alignment scores of random sequences will reveal that the scores follow a different distribution than the normal distribution called the _________

Gumbel equal value distribution
Gumbel extreme value distribution
Gumbel end value distribution
Gumbel distribution

Discuss Question

Answer: Option B. -> Gumbel extreme value distribution
Answer: (b).Gumbel extreme value distribution

Question 117. Waterman, in1989, provided a set of means and standard deviations of global alignment scores between random DNA sequences, using mismatch and gap penalties that produce a linear increase in score with _______ a distinguishing feature of global alignments.

alignment score
sequence score
sequence length
scoring system

Discuss Question

Answer: Option C. -> sequence length
Answer: (c).sequence length

Question 118. When random or unrelated sequences are compared using a global alignment method, they can have ____________ reflecting the tendency of the global algorithm to match as many characters as possible.

very low scores
very high scores
moderate scores
low scores

Discuss Question

Answer: Option B. -> very high scores
Answer: (b).very high scores

Question 119. Which of the following are not related to Needleman-Wunsch alignment algorithm?

Global alignment programs use this algorithm
The output is a positive number
Small changes in the scoring system can produce a different alignment
Changes in the scoring system can produce the same alignment

Discuss Question

Answer: Option D. -> Changes in the scoring system can produce the same alignment
Answer: (d).Changes in the scoring system can produce the same alignment

Question 120. The statistical analysis of alignment scores is much better understood for ________ than for _______