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Questions and Answers
What is the primary function of the nucleus in a cell?
What is the primary function of the nucleus in a cell?
- Controlling all metabolic activities and cell division (correct)
- Regulating water balance
- Transporting nutrients
- Synthesizing proteins
Which structure is responsible for protein synthesis in the Rough Endoplasmic Reticulum?
Which structure is responsible for protein synthesis in the Rough Endoplasmic Reticulum?
- Nucleolus
- Nuclear pores
- Chromatin fibers
- Ribosomes (correct)
What distinguishes Smooth Endoplasmic Reticulum from Rough Endoplasmic Reticulum?
What distinguishes Smooth Endoplasmic Reticulum from Rough Endoplasmic Reticulum?
- It is connected to the nuclear membrane only
- It conducts sugars
- It contains ribosomes on its surface
- It detoxifies harmful substances (correct)
What happens to chromatin fibers during cell division?
What happens to chromatin fibers during cell division?
What benefit does the loss of the nucleus provide in red blood cells?
What benefit does the loss of the nucleus provide in red blood cells?
Flashcards
Nucleus Structure
Nucleus Structure
Enclosed by a double-layered membrane with pores; contains nucleolus and chromatin.
Nucleus Functions
Nucleus Functions
Controls metabolic activities and cell division; transmits hereditary traits.
Endoplasmic Reticulum (ER)
Endoplasmic Reticulum (ER)
Network of fluid-filled tubes connected to the nuclear and plasma membranes.
Rough ER
Rough ER
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Smooth ER
Smooth ER
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Study Notes
Nucleus
- The nucleus is enclosed by a double membrane with pores
- Pores allow material passage
- Nucleolus is a round structure within the nucleus
- Chromatin fibers are thread-like structures
- Chromatin condenses to form chromosomes during cell division
- Chromosomes contain genes, segments controlling cell functions and heredity
Nucleus Functions
- Controls all cell metabolic activities
- Cell division is controlled
- Transmission of hereditary traits from parents to offspring
Endoplasmic Reticulum (ER)
- Network of interconnected tubes and sheets
- Filled with fluid
- Connected to the nucleus (inner side) and plasma membrane (outer side)
- Rough ER has ribosomes on its surface
Functions of ER
- Forms framework supporting the cell
- Transports proteins
- Detoxifies substances (toxins, chemicals) that enter the body
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