Cytophysiology 2
Cytophysiology Mastery Quiz
Test your knowledge of cytophysiology with our comprehensive quiz, designed for students and professionals alike. This quiz includes 20 questions covering vital concepts such as the cell cycle, differentiation, apoptosis, and the cytoskeleton.
Prepare to challenge yourself and enhance your understanding with topics such as:
- Cellular mechanisms
- Stem cell differentiation
- Cytoskeletal fun
ctions - Organelle morphology
The cellular cycle:
G1 phase is involved in cell growth
S phase is responsible for DNA replication
Cyclin and CDK are active only in G0 phase
Mitotic spindle is formed in S-phase
The M-phase is the time for gene multiplication
What is not true regarding differentiation?
It is a resting phase
It is a development phase
It is part of the M-phase
It is part of the G0 phase
It is a phase distinct from the cell cycle
Primary messengers:
Ca2+
Are ligands which binds to receptors
CGMP and cAMP
Involved in the intracellular pathway
Include the G-protein
What is characteristic for apoptosis?
Its resticted to singular cells in tissues
Nucleus of cell undergoes lysis
Is executed by hydrolyzes from lysosomes
Is related to activation of caspases
Extrinsic pathway may be triggered with death receptors
Postnatal apoptisis:
Atresia of ovarian follicles
Loss of 75% glandular tissue in post-lactational breasts
Androgen dependent tissue of males after castration
The cytoskeleton structures responsible for cell movement includes:
Microtubules of axoneme
Contractile ring
Acidic and basic keratins
Lamellipodia
Filopodia
Permanent elements of the cytoskeleton includes:
Microvilli
Cilia
Cell cortex
Contractile ring
Lamellipodia
Flagella
Intermediate filaments
Choose correct process of activity in cytoskeleton:
Microtubules - karyokinesis
Microtubules - entire cell movement as a result of cilia motility
Microfilaments - cytokinesis
Microfilaments - karyokinesis
Labile elements of the cytoskeleton:
Actin filaments
Lamellipodia
Filopodia
Contractile ring
Flagella
Myofibrils
Microtubules
Mitotic spindle
Stress fibers
Lamins just under the nuclear elvelope
What is true regarding the cytoskeleton?
Actin filaments are needed for transport of endocytic vesicle
Desmin could be found in epithelial cell
The diameter of microtubules are 25 nm
The diameter of microfilamets are 5-7 nm
Vimentins are present in mesodermal origin cells
Microtubules are responsible for the shape of the cell nucleus
Microfilaments and intermediate filaments are responsible for the cell nucleus
Energy and synthesis of microfilaments is from ATP hydrolysis
The diameter of intermediate filaments are 7-11 nm
The cell cycle:
Includes cell division and interphase
G1 phase is characterized by DNA synthesis
Ther is a intense condensation of chromatin in the S-phase
G2 phase is the same as G0 phase
The cell cycle is not regulated by growth factors
What is correct regarding morphology and function of organelles?
Mitochondrion is covered by an inner and outer membrane
Golgi is responsible for ATP production
SER is a system of membranous tubules
Lysosomes are membraneless organelles
RER is the place of protein synthesis
Cyclins:
Have enzymatic activity
Are CDK regulators
Concentration of cyclin is constant during the cell cycle
Act only in checkpoints
Form complexes with cyclin-dependent kinases
Cellular differentiation:
Happens because of small mutations within the genome
Is related to genomic imprinting
Is a result of specific sets of gene expression
Results in genotype change
Results in phenotype change
What happens during the G2 phase of the cell cycle?
DNA replication
Synthesis of proteins of mitotic spindle
Accumulation of energy to be used during mitosis
Correction of defects of DNA synthesis in G2 checkpoint
Apperance of clevage furrow
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