Explanation: Gene expression is the bio-process by which DNA is “transformed” into protein, whereas DNA replication is
the bio-process by which the double-helix DNA system is duplicated
. … Gene expression also is source of great errors, such as in splicing, a process by which the mRNA is “edited.”
How are genes and DNA different?
DNA is the molecule that is the hereditary material in all living cells. Genes are
made of DNA
, and so is the genome itself. A gene consists of enough DNA to code for one protein, and a genome is simply the sum total of an organism's DNA.
How are DNA and gene expression different?
Gene expression is the
process by which the instructions in our DNA are converted into a functional product
, such as a protein. When the information stored in our DNA
?
is converted into instructions for making proteins
?
or other molecules, it is called gene expression
?
.
Is DNA gene expression?
Gene expression is
the process the cell uses to produce the molecule it needs by reading the genetic code written in the DNA
. To do this, the cell interprets the genetic code, and for each group of three letters it adds one of the 20 different amino acids that are the basic units needed to build proteins.
What is meant by gene expression?
Listen to pronunciation. (jeen ek-SPREH-shun)
The process by which a gene gets turned on in a cell to make RNA and proteins
. Gene expression may be measured by looking at the RNA, or the protein made from the RNA, or what the protein does in a cell.
Where Does gene expression occur?
Prokaryotic gene expression (both transcription and translation) occurs
within the cytoplasm of a cell
due to the lack of a defined nucleus; thus, the DNA is freely located within the cytoplasm. Eukaryotic gene expression occurs in both the nucleus (transcription) and cytoplasm (translation).
Where does DNA replication occur?
DNA replication occurs
in the cytoplasm of prokaryotes and in the nucleus of eukaryotes
. Regardless of where DNA replication occurs, the basic process is the same. The structure of DNA lends itself easily to DNA replication. Each side of the double helix runs in opposite (anti-parallel) directions.
What is an example of gene expression?
Some simple examples of where gene expression is important are:
Control of insulin expression
so it gives a signal for blood glucose regulation. X chromosome inactivation in female mammals to prevent an “overdose” of the genes it contains. Cyclin expression levels control progression through the eukaryotic cell cycle.
What is the purpose of gene expression?
Genes
encode proteins and proteins dictate cell function
. Therefore, the thousands of genes expressed in a particular cell determine what that cell can do.
What are the two stages of gene expression?
It consists of two major steps:
transcription and translation
. Together, transcription and translation are known as gene expression. During the process of transcription, the information stored in a gene's DNA is passed to a similar molecule called RNA (ribonucleic acid) in the cell nucleus.
What controls gene expression?
Gene expression is primarily controlled
at the level of transcription
, largely as a result of binding of proteins to specific sites on DNA. … The regulator gene codes for synthesis of a repressor molecule that binds to the operator and blocks RNA polymerase from transcribing the structural genes.
What are two different forms of a single gene called?
Different versions of a gene are called
alleles
. Alleles are described as either dominant or recessive depending on their associated traits.
What is gene expression study?
Gene expression analysis is most simply described as
the study of the way genes are transcribed to synthesize functional gene products — functional RNA species or protein products
.
What are the 3 stages of translation?
Translation of an mRNA molecule by the ribosome occurs in three stages:
initiation, elongation, and termination
.
What triggers gene expression?
Gene expression is influenced by numerous factors, including
molecules within the cell
, mutations causing dominant negative effects and haploinsufficiency, signaling molecules from surrounding cells and the environment, and epistasis. Various molecules within the cell modulate gene expression.
Genes encode proteins and proteins dictate cell function
. Therefore, the thousands of genes expressed in a particular cell determine what that cell can do.
