mcqs Flashcards
Cell membrane consists of
lipid bilayer and integral proteins
Pinocytosis is
uptake by the cells of fluid material
a contact which lets the intercellular space disappear
tight junction (zonula occludens)
Tight junctions are the closely associated areas of two cells whose membranes join together forming a barrier virtually impermeable to fluid.
conexones are structural components of
gab junction (nexus)
golgi apparatus is stained with
silver nitrate (AgNO3)
Formation of new mitochondria is associated with
their own budding or simple division
a process which is concerned with the rough surfaced (granular) endoplasmic reticulum
protein synthesis
coated vesicles participate in
intracellular transport processes
the lysosome consist of … (what kind of membrane and enzymes?)
single membrane and hydrolytic enzymes
the microtubules are components of the
cytoskeleton
Microtubules are microscopic hollow tubes made of the proteins alpha and beta tubulin that are part of a cell’s cytoskeleton, a network of protein filaments that extends throughout the cell, gives the cell shape, and keeps its organelles in place. Microtubules are the largest structures in the cytoskeleton at about 24 nanometers thick. They have roles in cell movement, cell division, and transporting materials within cells.
the sex chromatin is seen in … (what kind of cells?)
female somatic cells
feulgen reaction is used for visualization of
DNA
the histone proteins take part in .. (formation of what)
formation of Dna molecule
the interphase nucleus of young, functional activity cells is .. (size, colour, nucleolus)
large, pale stained with prominent nucleolus
at metaphase the cromosomes
move to the center of the cell in relation to the spindle fibers
mitotic spindle fibers consist of
microtubules
lipids are visualized using
Sudan III
the karyorexis is
fragmentation of the nucleus
Karyorrhexis (from Greek karyon, “kernel, seed or nucleus”, and rhexis, “bursting”) is the destructive fragmentation of the nucleus of a dying cell whereby its chromatin is distributed irregularly throughout the cytoplasm.It is usually preceded by pyknosis and can occur as a result of either programmed cell death (apoptosis), senescence, or necrosis.
the aprocrine secretion is associated with
loss of the apical portion of the cell cytoplasm
apoptosis is
programmend cell death
the fibers of the division spindle are
microtubules
the nucleolus is … (function)
related to the formation of subunits of the ribosomes
the enzyme acid phosphatase is characteristic for
rough endoplasmatic reticulum (rER)
