29 Questions
Which region of nucleolonema contains dense granules representing maturing ribosomal subunits during assembly for export to the cytoplasm?
Pars granulosa
What characterizes Pars fibrosa of nucleolonema?
Consists of densely packed ribonucleic protein fibers
Which structure surrounds epithelial cells in a belt-like fashion?
Belt desmosomes or zonula adherens
What is the main composition of the nucleoplasm?
Enzymatic and non-enzymatic proteins, metabolites, ions, and water
What is the size range of spot desmosomes or macula adherens?
~200-400 nm in diameter
What appears second in the Pars fibrosa region of nucleolonema?
Newly synthesized rRNA
What does the mitochondrial matrix contain?
Water, solutes, and large matrix granules
Which process is mainly associated with the Krebs cycle in the mitochondria?
Yielding CO2 and NADH along the respiratory chain
What is a key function of mitochondria related to energy production?
Generating ATP by storing energy from cellular metabolites
Which statement accurately describes mitochondrial DNA (mtDNA)?
It is replicated independently of the cell cycle
How do mitochondria reproduce themselves?
Using fission or budding processes
Where are mitochondria typically located within cells?
Randomly distributed throughout the cytoplasm
Which of the following is NOT a function of the rough endoplasmic reticulum (rER)?
Synthesis of complex lipids
Which of the following statements about the smooth endoplasmic reticulum (sER) is INCORRECT?
It is responsible for the synthesis of secretory proteins.
What is the primary function of the Golgi complex?
Coordinating membrane flow and vesicle traffic among organelles
Which of the following is a function of the smooth endoplasmic reticulum (sER) in hepatocytes (liver cells)?
Synthesis of complex lipids and drug detoxification
Which organelle is responsible for the release and capture of $Ca^{2+}$ ions in striated muscle cells?
Smooth endoplasmic reticulum (sER)
Which of the following statements about the Golgi complex is INCORRECT?
It is involved in the synthesis of secretory proteins.
Which of the following statements about cells is correct?
Cells are the structural and functional units of all living organisms.
What is the primary difference between prokaryotic and eukaryotic cells?
Eukaryotic cells have a nuclear envelope and membrane-bound organelles, while prokaryotic cells lack these structures.
Which of the following factors does NOT influence the shape of a cell?
The presence or absence of a cell wall
Which of the following statements about cellular size is correct?
Cellular size can vary widely, even among cells of the same type.
Which of the following is NOT a characteristic of eukaryotic cells?
They lack a nuclear envelope and histones.
What is the primary function of the cell membrane?
To regulate the exchange of materials between the cell and its environment
Which of the following statements about intermediate filaments is correct?
They play a role in maintaining cell shape and epithelial cell adhesion.
Which of the following is NOT a type of intermediate filament mentioned in the text?
Actin filaments
What is the primary function of microtubules?
Transporting molecules within the cell
What are the subunits that make up the walls of microtubules called?
Tubulin heterodimers
How many protofilaments align parallel to one another to form the wall of a microtubule?
13
Explore the structural organization and general features of a cell, including the cell membrane, organelles, and cytoplasm. Learn about the diversity in cellular shape, size, and structures that are adapted for specific functions in tissues and organs.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
