Cytophysiology 1

Create an illustration of a vibrant, colorful cell with visible organelles like mitochondria and a nucleus, incorporating elements of cytophysiology, such as DNA strands and signaling pathways, in an educational and engaging style.

Cytophysiology Challenge: Test Your Knowledge

Welcome to the Cytophysiology Quiz, designed to assess and enhance your understanding of cellular processes, signaling mechanisms, and the intricate world of cell biology. Whether you are a student, a teacher, or simply a biology enthusiast, this quiz will provide valuable insights!

20 challenging questions
Checkbox format for different perspectives
Perfect for self-assessment

20 Questions5 MinutesCreated by ExploringCells472

Cyclins:

Have enzymatic activity

Are cdk regulators

Concentration of cyclin is constant during cell cycle

Act only in checkpoints

Form complexes with cyclin-dependent kinases

Apoptosis:

Is also called programmed cell death

Is a synonym for necrosis

During apoptosis the nucleus and cell becomes compact

It is under hormonal control

Swelling and lysin are observed

Unavoidable

It is an essential process during embryogenesis

Cellular differentiation:

Is because of small mutations within the genome

Is related with genomic imprinting

Is a result of specific sets of gene expression

Result in genotype change

Results in phenotype change

What is correct?

Differentiation is also named proliferation

Differentiation occurs during prenatal and postnatal life

Monocytes are able to differentiate into macrophages

Differentiation can not occur postnatally

Nerve cells loose their ability for proliferation and differentiation

Red blood cells are able to differentiate within other cells

Intermediate filaments:

Have 25 nm diameter

Are resistant to chemical substances

Provide mechanical strength to cells and tissues

Allow transport of organelles in cell cytoplasm

Form contractile ring

Free radicals:

Can increase average lifespan

Damage lipids, proteins and nucleic acids

Are highly reactive molecules

Have an unpaired electron in an outer orbital

Can be produced by mitochondria

Types of cell signaling:

Paracrine signaling is a short distance signaling

Autocrine signaling is a short distance signaling

Endocrine signaling is a short distance signaling

Paracrine signaling is a long distance signaling

In autocrine signaling the secretory cell is a target cells too

The cell cycle:

Is divided into G1, S, G2 and M phase

G1 phase of interphase is characterized by DNA synthesis

There is intense condensation of chromatin in S phase of interphase

G2 phase of interphase is the same as the G1 phase

Cyclin dependent kinases have no intrinsic enzymatic activity

The cell cycle is regulated by growth factors

Euchromatin is the less coiled portion of chromosomes

Heterochromatin is the highly coiled portion of the cell

The cell cycle is a sequence of phases of the life cycle of cells

What is true?

T3 and T4 bind to membrane receptors

Lipophilic ligands bind to membrane receptors

FSH and LH do not penetrate the plasma membrane

Acetylcholine is an example for lipophilic ligand

Insulin binds to intercellular receptors

Cell signaling:

The receptor cannot simplify the strength of the signal

The receptor never modulates received signal

Involves sending an information to another cell

Is not important during embryogenesis

To receive a signal, the target cell always has to be in physical contact with the effector cell

Antagonists:

Does not exhibit ability to activate receptors

Non-competative changes the shape of enzymes

Exhibit the same chemical structure as agonists does

Can lead to competitive inhibition after binding to the receptor

Do not bind to receptors

Can not bind to the receptor when concentration of agonists are high

What is true regarding the control system of the cell cycle?

After exposition to stress factors the cell may:

Fall in necrosis process if fraction was strong enough

Starts proliferation

Include apoptosis process if p53 recognizes severe DNA destruction

Activate recovery process if destruction can be repaired

Nothing happens in cells after exposition

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Cytophysiology 1

Cytophysiology Challenge: Test Your Knowledge

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