Which of the following is a function of the nucleus stores DNA?
stores DNA. The nucleus stores the coded instructions for making the cell’s proteins. The nucleus usually contains a nucleolus region which is where ribosome assembly begins.
Which of the following functions is the nucleus responsible for?
The nucleus controls and regulates the activities of the cell (e.g., growth and metabolism) and carries the genes, structures that contain the hereditary information. Nucleoli are small bodies often seen within the nucleus. The gel-like matrix in which the nuclear components are suspended is the nucleoplasm.
Which of the following is a function of the nucleus quizlet?
The nucleus controls the cell because it has all the DNA. The nucleus directs the formation of proteins and the proteins run everything else.
What does the nucleus store?
The nucleus stores chromatin (DNA plus proteins) in a gel-like substance called the nucleoplasm. To understand chromatin, it is helpful to first consider chromosomes.
Why is a nucleus important?
The nucleus is considered to be one of the most important structures of eukaryotic cells as it serves the function of information storage, retrieval and duplication of genetic information. It is a double membrane‐bound organelle that harbours the genetic material in the form of chromatin.
What is a nucleus simple definition?
1 : a usually round part of most cells that is enclosed in a double membrane, controls the activities of the cell, and contains the chromosomes. 2 : the central part of an atom that comprises nearly all of the atomic mass and that consists of protons and neutrons.
What is nucleus example?
The nucleus is the center core of an atom that has a positive charge and that contains most of the atom’s mass, or the central heart of an organization or group. An example of a nucleus is the center core of an atom. The nucleus of a city. …
What are the functions of nucleus class 8?
The nucleus has 2 primary functions:
- It is responsible for storing the cell’s hereditary material or the DNA.
- It is responsible for coordinating many of the important cellular activities such as protein synthesis, cell division, growth and a host of other important functions.
What are 2 functions of the nucleus?
What is the nucleus?
- The nucleus is an organelle found in most eukaryotic cells, the exception being red blood cells.
- The primary functions of the nucleus are to store the cell’s DNA, maintain its integrity, and facilitate its transcription and replication.
What is the definition of mitochondrion?
Mitochondrion, membrane-bound organelle found in the cytoplasm of almost all eukaryotic cells (cells with clearly defined nuclei), the primary function of which is to generate large quantities of energy in the form of adenosine triphosphate (ATP).
What is the structure and function of Golgi body?
The Golgi apparatus, also called Golgi complex or Golgi body, is a membrane-bound organelle found in eukaryotic cells (cells with clearly defined nuclei) that is made up of a series of flattened stacked pouches called cisternae. It is located in the cytoplasm next to the endoplasmic reticulum and near the cell nucleus.
What are the characteristics of Golgi bodies?
Distinguishing Characteristics A Golgi apparatus is composed of flat sacs known as cisternae. The sacs are stacked in a bent, semicircular shape. Each stacked grouping has a membrane that separates its insides from the cell’s cytoplasm. Golgi membrane protein interactions are responsible for their unique shape.
What are the two functions of Golgi body?
A major function is the modifying, sorting and packaging of proteins for secretion. It is also involved in the transport of lipids around the cell, and the creation of lysosomes. The sacs or folds of the Golgi apparatus are called cisternae.
Why is the Golgi apparatus the most important organelle?
Why is the Golgi Apparatus the most important organelle? The main function of Golgi apparatus is to carry out the processing of proteins generated in the ER. Golgi apparatus also transports protein to the different parts of cell. Cells synthesize a large number of different macromolecules required for life.
What is the main function of lysosomes Class 9?
CBSE NCERT Notes Class 9 Biology Fundamental Unit of Life. The sac-like structures in a cell surrounded by membrane are called lysosomes. They keep the cells clean by digesting and breaking the outside materials like bacteria, food entering the cell or worn-out cell organelles into small pieces.
What Colour are lysosomes?
What is the main function of lysosomes quizlet?
Lysosomes break down lipids, carbohydrates, and proteins into small molecules that can be used by the rest of the cell. They are also involved in breaking down organelles that have outlived their usefulness. The cytoskeleton helps the cell maintain its shape and is also involved in movement.
What are the two major functions of lysosomes?
A lysosome has three main functions: the breakdown/digestion of macromolecules (carbohydrates, lipids, proteins, and nucleic acids), cell membrane repairs, and responses against foreign substances such as bacteria, viruses and other antigens.
Which of the following is not function of Golgi apparatus?
Answer. The detoxification of drugs is not done by the Golgi apparatus. Storing and packaging of products synthesised in ER, the formation of lysosomes, and the synthesis of complex sugars from simple sugars are all some of the functions that are performed by the Golgi apparatus.
What is the function of Cisternae?
Cisternae pack and modify proteins and polysaccharides. Biosynthetic cargo proteins travel through cisternae and undergo glycan remodeling and other modifications. Cisternae pack the proteins and then send them to transport carriers. They also pack polysaccharides that are synthesized in the Golgi apparatus.
How many Golgi apparatus are in cells?
The number of compartments in any one Golgi apparatus is usually between 3 and 8. The number of sets of Golgi apparatus in a cell can be as few as 1, as in many animal cells, or many hundreds as in some plant cells. Specialised secretory cells contain more sets of Golgi apparatus than do other cells.