The gene for the MyoD transcription factor is introduced into cultured fat cells. When the gene is expressed, the fat cells are transformed into muscle cells. What does this result imply about the fat cells and their commitment to the fat-cell fate? a) They are both committed and irreversibly determined. b) They were neither committed nor determined. c) They are committed to this fate, but not irreversibly determined. d) They are determined, but not committed.

(C) They are committed to this fate, but not irreversibly determined

Explanation:

MyoD is a transcription factor and can also guide the remodelling of chromatin by binding to a DNA motif. Transcription factors are proteins involved in the process of converting, or transcribing, DNA into RNA.

When fat cells is centrifuged, mature fat cells, or cultured fat cells, are obtained at the uppermost layer.

Fat cells are committed to the fat-cell fate but not irreversibly determined.

The correct answer to the question is option C

THEY ARE COMMITTED TO THIS FATE,BUT NOT IRREVERSIBLY DETERMINED.

Fat cells are committed to this fate, but not irreversibly determined.

Explanation: MyoD is also known as myoblast determination protein 1, it is a protein found in animals that plays a crucial role in the regulation of muscle differentiation.

MyoD functions as a transcriptional activator thus promoting transcription of muscle-specific target genes and as well playing a role in muscle differentiation.

Together with MYF5, MYOG, co-occupies muscle-specific gene promoter core region during myogenesis,Inducing fibroblasts to differentiate into myoblasts. Interacts with and is therefore inhibited by the twist protein. This interaction probably involves the basic domains of both proteins.The loss of MyoD facilitates adipogenic transdifferentiation of myoblasts while the overexpression of MyoD transdifferentiate brown preadipocytes to myoblasts.

transcription is a process in which information is rewritten. it is something our cells must do, in a more specialized and narrowly defined way. in biology, transcription is the process of copying out the dna sequence of a gene in the similar alphabet of rna. it needs to happen in the nucleus because that's where the dna is. dna is always inside the nucleus unless the cell is dividing.

transcription is the first step in gene expression, which involves copying a gene's dna sequence to make an rna molecule. transcription is performed by rna polymerases. it has three stages: initiation, elongation, and termination. rna molecules must be processed after transcription in eukaryotes.

explanation:

long version:

the protein synthesis consists two processes which are, transcription and translation. transcription takes place in the nucleus. it uses dna as a template to make an rna molecule. rna then leaves the nucleus and goes to a ribosome in the cytoplasm, where translation occurs. transcription is the first part of the central dogma of molecular biology: dna → rna. it is the transfer of genetic instructions in dna to messenger rna (mrna). during transcription, a strand of mrna is made that is complementary to a strand of dna.  

these three stages are:

  initiation: in which   is the beginning of transcription.occuring when the enzyme rna polymerase binds to a region of a gene called the promoter. this signals the dna to unwind so the enzyme can ‘‘read’’ the bases in one of the dna strands. the enzyme is now ready to make a strand of mrna with a complementary sequence of bases.

    elongation: in which is the addition of nucleotides to the mrna strand. rna polymerase reads the unwound dna strand and builds the mrna molecule, using complementary base pairs. there is a brief time during this process when the newly formed rna is bound to the unwound dna. during this process, an adenine (a) in the dna binds to an uracil (u) in the rna.

    termination: in which is the ending of transcription, and occurs when rna polymerase crosses a stop (termination) sequence in the gene. the mrna strand is complete, and it detaches from dna.