How does a gene direct the synthesis of a protein?

Answer 1

First, mRNA forms in the nucleus where it is transported to the cytoplasm. Once there, ribosome attaches to the mRNA and the anticodon region of tRNA bonds with the codon region of the mRNA. Ribosomes then mediate the protein synthesis by adding amino acids in accordance with the mRNA codon.

Answer 2

During the process of transcription, the information stored in a gene's DNA is transferred to a similar molecule called RNA (ribonucleic acid) in the cell nucleus. Both RNA and DNA are made up of a chain of nucleotide bases, but they have slightly different chemical properties. The type of RNA that contains the information for making a protein is called messenger RNA (mRNA) because it carries the information, or message, from the DNA out of the nucleus into the cytoplasm.

Translation, the second step in getting from a gene to a protein, takes place in the cytoplasm. The mRNA interacts with a specialized complex called a ribosome, which "reads" the sequence of mRNA bases. Each sequence of three bases, called a codon, usually codes for one particular amino acid. (Amino acids are the building blocks of proteins.) A type of RNA called transfer RNA (tRNA) assembles the protein, one amino acid at a time. Protein assembly continues until the ribosome encounters a "stop" codon (a sequence of three bases that does not code for an amino acid).

The flow of information from DNA to RNA to proteins is one of the fundamental principles of molecular Biology. It is so important that it is sometimes called the "central dogma."

Answer 3

Genes are small sections of DNA which contain genetic information that is needed for protein. The DNA that straightens up gets unzipped and the messenger RNA gets the code that is needed. The messenger RNA then goes out of the nucleus and into the cytoplasm of the cell, and is decoded at a ribosomes. The amino acids join together in the order specified by the plan to form a protein. Every 3 bases on the plan represent an amino acid ( amino acids are the chemicals protein is made out of). Enzymes bring the correct amino acids to the ribosomes and are chemically bonded together to make a long polypeptide chain.

Answer 4

The gene holds the information of how the mRNA is expressed. The gene tells what proteins and other materials the cell needs to produce. In the nucleus, the DNA unzips, breaking the bonds between the nucleotides. The RNA polymerase then binds to the promoter region of the DNA and begins to build a new complementary strand, using the rules of base pairing (A:U and C:G). This is what makes the mRNA strand, which then is transported to the cytoplasm to a ribosome, where the mRNA is then translated into protein.

Answer 5

A gene contains the instructions (genetic code) to make a specific protein. This genetic code is transcribed into a messenger RNA (mRNA) molecule, which carries the instructions to the ribosomes in the cell. At the ribosomes, the mRNA is translated into a sequence of amino acids that make up the protein, following the genetic code.

Answer 6

no i do not want to answer this question, that is why i googled it. i do not know the answer. retards.

Answer 7

Genes list the amino acids needed for construction of proteins.

Answer 8

gene expression