Cell Nucleus Fundamentals B

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What is the main function of nucleoporins?

Control gene expression

Facilitate movement of molecules across the nuclear pores (correct)

DNA packaging within the nucleus

Regulate cellular metabolism

Which of the following is NOT a component of a nucleosome?

Histones

Non-histone chromosomal proteins

Nucleosomes (correct)

Chromatin

What is the role of Ran in nuclear import and export of proteins?

Formation of nucleosomes

Regulation of histone modifications

Facilitation of movement through nuclear pores

Regulation of nuclear transport receptors (correct)

What is a key significance of nuclear import signals?

Recognition by nuclear transport receptors Signup and view all the answers

Which scientist is associated with the discovery of histones?

Albrecht Kossel Signup and view all the answers

What is the function of histones in nucleosome structure?

Packaging and organizing DNA into nucleosomes Signup and view all the answers

What is the role of histones in nucleosome structure?

Facilitate the compaction of DNA Signup and view all the answers

Which component is responsible for the import and export of proteins in the nucleus?

Ran Signup and view all the answers

What is the significance of nuclear import signals?

Facilitating the movement of proteins into the nucleus Signup and view all the answers

Which structures trap various proteins and mRNAs, hindering their function in the nucleus?

Nuclear pores Signup and view all the answers

What do meiosis I and mitosis have in common?

Both involve DNA synthesis Signup and view all the answers

Which process does lamin phosphorylation play a significant role in?

Mitosis Signup and view all the answers

Which cellular structure plays a role in ribosome biogenesis?

Nucleolus Signup and view all the answers

What is the function of the PML nuclear body?

Transcriptional regulation Signup and view all the answers

What is the additional function of Ran-GTP in spindle assembly during mitosis?

Assembling lamin into a matrixlike network Signup and view all the answers

Which component of the interphase nucleus is a structural protein?

Lamins Signup and view all the answers

In T-cell activation, what is NF-AT primarily involved in?

Transcriptional regulation Signup and view all the answers

What triggers an increase in the production of lncRNA NEAT1 leading to paraspeckle formation under stress?

Various cellular stress factors Signup and view all the answers

Cell Nucleus Fundamentals B - Lecture Quiz

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Questions and Answers

What is the main function of nucleoporins?

Which of the following is NOT a component of a nucleosome?

What is the role of Ran in nuclear import and export of proteins?

What is a key significance of nuclear import signals?

Which scientist is associated with the discovery of histones?

What is the function of histones in nucleosome structure?

What is the role of histones in nucleosome structure?

Which component is responsible for the import and export of proteins in the nucleus?

What is the significance of nuclear import signals?

Which structures trap various proteins and mRNAs, hindering their function in the nucleus?

What do meiosis I and mitosis have in common?

Which process does lamin phosphorylation play a significant role in?

Which cellular structure plays a role in ribosome biogenesis?

What is the function of the PML nuclear body?

What is the additional function of Ran-GTP in spindle assembly during mitosis?

Which component of the interphase nucleus is a structural protein?

In T-cell activation, what is NF-AT primarily involved in?

What triggers an increase in the production of lncRNA NEAT1 leading to paraspeckle formation under stress?

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