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Which characteristics describe the genetic code of humans?

Answer: The genetic code has four main features: Three nucleotides/bases encode an amino acid, there are 20 different amino acids which are the building blocks for proteins. The genetic code is non-overlapping, for example a sequence UGGAUCGAU is read UGG AUC GAU rather than UGG GGA GAU etc.

How many genes are in the genetic code of humans?

An international research effort called the Human Genome Project, which worked to determine the sequence of the human genome and identify the genes that it contains, estimated that humans have between 20,000 and 25,000 genes.

What are the main parts of the genetic code?

​Genetic Code The instructions in a gene that tell the cell how to make a specific protein. A, C, G, and T are the “letters” of the DNA code; they stand for the chemicals adenine (A), cytosine (C), guanine (G), and thymine (T), respectively, that make up the nucleotide bases of DNA.

What is the definition of genetic code?

Genetic code, the sequence of nucleotides in deoxyribonucleic acid (DNA) and ribonucleic acid (RNA) that determines the amino acid sequence of proteins. Though the linear sequence of nucleotides in DNA contains the information for protein sequences, proteins are not made directly from DNA.

How is genetic code formed?

The genetic code is the set of rules by which information encoded in genetic material (DNA or RNA sequences) is translated into proteins (amino acid sequences) by living cells. Those genes that code for proteins are composed of tri-nucleotide units called codons, each coding for a single amino acid.

Where is the genetic code found?

The Genetic Code is stored on one of the two strands of a DNA molecules as a linear, non-overlapping sequence of the nitrogenous bases Adenine (A), Guanine (G), Cytosine (C) and Thymine (T). These are the “alphabet” of letters that are used to write the “code words”.

What is the second genetic code?

An imprecise term that sometimes refers to the nature of the amino acid residues of a protein which determine its secondary and tertiary structure, and sometimes to the features of a tRNA molecule that make it recognizable by one amino acid synthetase but not by others.

What are the stages of protein synthesis?

Protein synthesis is the process in which cells make proteins. It occurs in two stages: transcription and translation. Transcription is the transfer of genetic instructions in DNA to mRNA in the nucleus. It includes the steps of initiation, elongation, and termination.

What is the difference between genetic code and codon?

Genetic code and codon are two methods used to store genetic information in the genetic material. Genetic code is a collection of codons. Codon is a nucleotide triplet, which represents a specific amino acid. Three codons serve as stop codons, which terminate the translation.

How many codons are in a gene?

64 codons

Is a gene a codon?

A codon is a trinucleotide sequence of DNA or RNA that corresponds to a specific amino acid. The genetic code describes the relationship between the sequence of DNA bases (A, C, G, and T) in a gene and the corresponding protein sequence that it encodes.

Can you have multiple start codons?

Dear Aqib Sayyed, It’s common to have multiple ATG codons in an mRNA sequence. In this case, the second one can be considered as start codon for that functional protein sequence. This phenomenon is considered as a translational regulation of a functional gene.

What are the start and stop codons in DNA?

The start codon marks the site at which translation into protein sequence begins, and the stop codon marks the site at which translation ends.

What happens when a stop codon is reached?

What happens when a stop codon is reached by a ribosome? A termination tRNAter binds to the codon and the growing peptide is transferred to it. A termination tRNAter binds to the codon and is used to release the growing peptide from the P site tRNA. The ribosome then is likely to dissociate.

What is one possible result of a mutation within a stop codon?

This mutation causes a different amino acid to be created. This mutation changes an amino acid codon into a stop codon. A substitution that changed an amino acid codon into a stop codon would produce a prematurely terminated polypeptide.