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HTH Motif & Homeodomain MCQ Questions & Answers

HTH Motif & Homeodomain MCQs : This section focuses on the "HTH Motif & Homeodomain". These Multiple Choice Questions (MCQs) should be practiced to improve the HTH Motif & Homeodomain skills required for various interviews (campus interview, walk-in interview, company interview), placement, entrance exam and other competitive examinations.




Question 1

Considering the specificity of the protein-DNA interaction in the case of regulatory proteins it can be concluded that there is a particular amino acid-base code.

A. True
B. False

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Question 2

From the H-T-H motif, only one of the two α-helical segments is called the recognition helix.

A. False
B. True

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Question 3

The H-T-H structure is inherently very stable.

A. True
B. False

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Question 4

The lac repressor has which of the following DNA-binding motifs?

A. Leucine zippers
B. Zinc fingers
C. Homeodomain
D. H-T-H motif

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Question 5

What are the genes that regulate the development of body patterns called?

A. Developmental genes
B. Growth genes
C. Activator genes
D. Homeotic genes

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Question 6

What is the average length of the H-T-H motif?

A. 30 amino acid residues
B. 50 amino acid residues
C. 100 amino acid residues
D. 20 amino acid residues

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Question 7

What is the average length of the α-helical segments in the H-T-H motif?

A. 13 – 15 amino acid residues
B. 11 – 19 amino acid residues
C. 10 – 15 amino acid residues
D. 7 – 9 amino acid residues

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Question 8

What is the DNA sequence that encodes the homeodomain known as?

A. Zinc fingers
B. H-T-H motifs
C. Leucine zippers
D. Homeobox

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Question 9

Which among the following is not a DNA-binding motif?

A. H-T-H
B. Zinc fingers
C. Homeodomain
D. Homeobox

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Question 10

Which DNA-binding motif has two short helical segments separated by a turn?

A. H-L-H
B. Leucine zipper
C. Zinc fingers
D. H-T-H

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Question 11

Which of the following DNA-binding motif functions as transcriptional regulators, especially during eukaryotic development?

A. Zinc fingers
B. Leucine zippers
C. H-T-H motif
D. Homeodomain

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Question 12

Which of the following interactions majorly imparts specificity to most of the protein-DNA contacts?

A. Hydrophobic interaction
B. Covalent interactions
C. Disulfide bonds
D. Hydrogen bonds

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Question 13

Which of the following is a feature of a lac repressor?

A. It is a dimer
B. It is a trimer
C. It is a monomer
D. It is a tetramer

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Question 14

Which of the following proteins have discrete DNA-binding domains?

A. Excretory proteins
B. Plasma membrane proteins
C. Catalytic proteins
D. Regulatory proteins

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