DNA Packing Quiz

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How DNA is packed in the nucleus

Créé par

Crystal Janelle Tabsing

Philippines

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DNA Packing Quiz


DNA Packing QuizVersion en ligne How DNA is packed in the nucleus par Crystal Janelle Tabsing 1 Why must DNA be packed tightly inside the nucleus? a To fit long molecules and regulate access for processes b To increase DNA length c To prevent any gene from being expressed d To make the nucleus look compact at all times 2 What happens if DNA becomes tangled or unfolded? a It can impede replication and transcription b It has no effect c It makes the cell divide faster d It speeds up protein synthesis 3 How do histones help chromosomes form? a DNA wraps around histone proteins to form nucleosomes b Histones degrade DNA to shorten it c Histones bind to RNA instead d Histones lengthen DNA strands 4 What is a nucleosome? a A type of RNA molecule b DNA wrapped around a core of histone proteins c A protein that breaks DNA d A flat DNA loop with no proteins 5 Which level of DNA packing is most directly responsible for chromatin structure? a Ribosome assembly b DNA triplets c Mitochondrial DNA looping d Nucleosome and histone interaction 6 What is chromatin? a Protein alone with no DNA b A lipid layer surrounding DNA c DNA plus proteins that package and regulate it d RNA only 7 Which enzyme modifies histones to regulate access to DNA? a DNA polymerase b Ligase c Histone-modifying enzymes d Ribosome 8 What role do histone tails play in packing? a They can be modified to condense or relax chromatin b They break down histones c They do not have any function d They transport DNA out of the nucleus 9 Which structure is the first level of DNA compaction? a Genome b Centromere c Chromosome d Nucleosome core particle 10 How does DNA packaging affect gene expression? a All packaged DNA is always active b Packaging never affects expression c Packaging only affects replication, not expression d Packaging can hide or expose genes to transcriptional machinery Feedback 1 DNA must be densely packed to fit in the nucleus and to regulate gene access during processes like transcription. 2 Tangling can block enzymes, hindering replication and transcription; proper packaging prevents this. 3 DNA coils around histones to create nucleosomes, the first level of chromatin structure. 4 Nucleosomes are the basic units of chromatin, consisting of DNA wound around histone cores. 5 Nucleosomes, formed by DNA-histone interactions, establish chromatin architecture. 6 Chromatin is DNA associated with histones and other proteins that organize and regulate it. 7 Histone acetyltransferases, deacetylases, and other enzymes modulate chromatin accessibility. 8 Post-translational modifications on histone tails alter interactions and chromatin compaction. 9 The nucleosome core particle is the initial chromatin unit forming higher-order structures. 10 Chromatin compaction states influence whether genes are accessible for transcription.

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DNA Packing Quiz

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À propos de cette activité

Créé par

Téléchargez la version pour jouer sur papier

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DNA Packing QuizVersion en ligne

par Crystal Janelle Tabsing

Why must DNA be packed tightly inside the nucleus?

What happens if DNA becomes tangled or unfolded?

How do histones help chromosomes form?

What is a nucleosome?

Which level of DNA packing is most directly responsible for chromatin structure?

What is chromatin?

Which enzyme modifies histones to regulate access to DNA?

What role do histone tails play in packing?

Which structure is the first level of DNA compaction?

How does DNA packaging affect gene expression?

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