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Question
Which of the following eukaryotes are devoid of histone proteins?
Which of the following eukaryotes are devoid of histone proteins?
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Solution
The correct option is C Fire algae
Chrysophytes are characterized by presence of yellow and brown carotenoids which impart them golden colour; hence the name golden algae; Option A is incorrect answer as histone proteins are present in them. Dinoflagellates are the only eukaryotes that have no histone protein in their DNA, which is always in condensed form. They are luminescent algae; their pigment luciferin is acted upon by the enzyme luciferase causing production of light without any heat, thus the name fire algae. Option C is correct. Euglenoids are unicellular biflagellated algae which are characterized by euglenoid movement but have histone proteins. Slime molds are fungus like protists, characterized by presence of plasmodium at a stage of their life cycle; they have histone proteins. Option D is incorrect. Thus, the correct answer is option C.
Chrysophytes are characterized by presence of yellow and brown carotenoids which impart them golden colour; hence the name golden algae; Option A is incorrect answer as histone proteins are present in them. Dinoflagellates are the only eukaryotes that have no histone protein in their DNA, which is always in condensed form. They are luminescent algae; their pigment luciferin is acted upon by the enzyme luciferase causing production of light without any heat, thus the name fire algae. Option C is correct. Euglenoids are unicellular biflagellated algae which are characterized by euglenoid movement but have histone proteins. Slime molds are fungus like protists, characterized by presence of plasmodium at a stage of their life cycle; they have histone proteins. Option D is incorrect. Thus, the correct answer is option C.
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