Núcleo Celular Flashcards
(27 cards)
What is the primary function of the cell nucleus?
The primary function of the cell nucleus is to store and protect the cell’s genetic material (DNA).
True or False: The nucleus is present in all types of cells.
False: The nucleus is not present in prokaryotic cells.
What structure surrounds the nucleus?
The nucleus is surrounded by the nuclear envelope.
Fill in the blank: The nuclear envelope consists of ______ membranes.
two
What are the small openings in the nuclear envelope called?
Nuclear pores.
What is the role of nuclear pores?
Nuclear pores regulate the transport of molecules in and out of the nucleus.
What is the substance within the nucleus called?
Nucleoplasm.
What is the function of nucleolus?
The nucleolus is responsible for ribosome production.
True or False: Chromatin is the uncoiled form of DNA found in the nucleus.
True.
What is the difference between chromatin and chromosomes?
Chromatin is the relaxed form of DNA, while chromosomes are the condensed, visible form during cell division.
What is the primary component of chromatin?
DNA and proteins (histones).
Fill in the blank: The process of DNA replication occurs in the ______.
nucleus.
What type of RNA is synthesized in the nucleus?
Messenger RNA (mRNA).
True or False: The nucleus plays a role in gene expression.
True.
What is the function of the nuclear lamina?
The nuclear lamina provides structural support to the nucleus and helps organize chromatin.
What is the term for the division of the nucleus during cell division?
Mitosis.
Fill in the blank: The nucleus contains genetic material in the form of ______.
DNA.
What is a key difference between eukaryotic and prokaryotic cells regarding the nucleus?
Eukaryotic cells have a defined nucleus, while prokaryotic cells do not.
What is the role of histones in the nucleus?
Histones help package and organize DNA into chromatin.
True or False: The nucleus is involved in the synthesis of lipids.
False.
What happens to the nucleus during apoptosis?
The nucleus disassembles and the DNA is degraded.
What is the function of the nuclear pore complex?
The nuclear pore complex facilitates the transport of proteins and RNA between the nucleus and cytoplasm.
Fill in the blank: During interphase, DNA exists as ______.
chromatin.
What is the importance of the nuclear envelope in protecting genetic material?
The nuclear envelope protects DNA from damage and regulates access to genetic information.
