What is true about the genetic code?

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.

What statements describe the genetic code?

Explanation: The genetic code can be defined as the four nitrogenous bases present in the structure of the DNA including A, C, G, and T. These are responsible for encoding proteins. These form the basis of the three nucleotides called as triplet arranged in the code of a amino acid.

What does genetic code mean?

The genetic code is a set of rules defining how the four-letter code of DNA is translated into the 20-letter code of amino acids, which are the building blocks of proteins.

What is the purpose of the genetic code?

The genetic code is the set of rules used by living cells to translate information encoded within genetic material (DNA or mRNA sequences of nucleotide triplets, or codons) into proteins.

What are the types of genetic code?

Types of Genetic Code:

DNA Codons: These are the codons as they are read on the sense (5′ to 3′) strand of DNA.
Types of Codon:
The Code is Triplet:
The Code is Universal:
The Code is Commaless:
The Code is Non-Overlapping:
The Code is Non-ambiguous:
The Code is Redundant:

What is silent gene?

Silent genes are generally found in more compact regions of chromatin, termed heterochromatin, while active genes are in regions of euchromatic chromatin which is less compact and more permissible for proteins to bind.

What is genetic code write its four characteristics?

The genetic code has four main features: The code is degenerate, meaning more than one codon encodes for the same amino acid. There are 64 possible triplets yet only 20 amino acids so most amino acids are encoded by 2 or more codons. Triplets that code for the same amino acid are known as synonyms.

What are the main characteristics of genetic code?

Characteristics of the Genetic Code

The genetic code is universal. All known living organisms use the same genetic code.
The genetic code is unambiguous. Each codon codes for just one amino acid (or start or stop).
The genetic code is redundant. Most amino acids are encoded by more than one codon.

How does genetic code work?

Genetic code is the term we use for the way that the four bases of DNA–the A, C, G, and Ts–are strung together in a way that the cellular machinery, the ribosome, can read them and turn them into a protein. In the genetic code, each three nucleotides in a row count as a triplet and code for a single amino acid.

What is genetic code write its salient features?

The salient features of genetic code are as follows: i The codon is triplet. 61 codons code for amino acids and 3 codons do not code for any amino acids hence they function as stop codons. ii One codon codes for only one amino acid hence it is unambiguous and specific.

Which is not a feature of genetic code?

1. Which of the following is not a feature of the genetic code? Explanation: The genetic code is non – ambiguous. This means that there is no ambiguity about a particular codon.

Which salient features of genetic code is without exception?

Genetic code is unambiguous, and not ambiguous, which means that one codon for one amino acid only; GAA codes for glutamine only.

What is translation process?

Translation is the process of translating the sequence of a messenger RNA (mRNA) molecule to a sequence of amino acids during protein synthesis. The genetic code describes the relationship between the sequence of base pairs in a gene and the corresponding amino acid sequence that it encodes.

What are 3 steps of translation?

Translation of an mRNA molecule by the ribosome occurs in three stages: initiation, elongation, and termination.

What are the 5 steps of translation?

Translation (Protein Synthesis)

Initiation. In this step the small subunit part of the ribosome attaches to the 5′ end of the mRNA strand.
Elongation.
Termination.

What is the end result of translation?

When the ribosome reaches a stop codon, it releases the mRNA strand and amino acid sequence. The amino acid sequence is the final result of translation, and is known as a polypeptide.

What is the result of protein synthesis?

The result of protein synthesis is a chain of amino acids that have been attached, link by link, in a specific order. This chain is called a polymer or polypeptide and is constructed according to a DNA-based code. Polypeptide chains are formed during the translation process of protein synthesis.

Is RNA An exact copy of DNA?

Transcription is the process by which the information in a strand of DNA is copied into a new molecule of messenger RNA (mRNA). Although the mRNA contains the same information, it is not an identical copy of the DNA segment, because its sequence is complementary to the DNA template.

What is created during translation?

In translation, messenger RNA (mRNA) is decoded in a ribosome, outside the nucleus, to produce a specific amino acid chain, or polypeptide. The polypeptide later folds into an active protein and performs its functions in the cell.

What are the 6 steps of translation?

What are the Six Steps of Translation in Eukaryotes

I. binding of mRNA to ribosome.
(ii) Aminoacylation.
(iii) Initiation.
(iv) Elongation.
Step I- Binding of incoming aminoacyl.
(v) Termination.
(vi) Post-translational modifications.

What are the 5 steps of protein synthesis?

The major steps are:

(a) Activation of amino acids:
(b) Transfer of amino acid to tRNA:
(c) Initiation of polypeptide chain:
(d) Chain Termination:
(e) Protein translocation:

What are the 6 steps of translation and protein synthesis?

Terms in this set (6)

Step 1 of Translation. mRNA attaches to the ribosome.
Step 2 of Translation. tRNA’s attach to free amino acids in the cytoplasmic “pool” of amino acids.
Step 3 of Translation. tRNA carries its specific amino acid to the ribosome.
Step 4 of Translation.
Step 5 of Translation.
Step 6 of Translation.

What are the 7 steps of protein synthesis?

Terms in this set (12)

DNA unzips in the nucleus.
mRNA nucleotides transcribe the complementary DNA message.
mRNA leaves nucleus and goes to ribosome.
mRNA attaches to ribosome and first codon is read.
tRNA brings in proper amino acid from cytoplasm.
a second tRNA brings in new amino acid.

What is the correct order for protein synthesis?

The correct sequence of events in protein synthesis is transcription, then translation.

What are the 4 steps of translation?

Translation happens in four stages: activation (make ready), initiation (start), elongation (make longer) and termination (stop). These terms describe the growth of the amino acid chain (polypeptide). Amino acids are brought to ribosomes and assembled into proteins.

Which is the first step of translation?

Translation is generally divided into three stages: initiation, elongation, and termination (Figure 7.8). In both prokaryotes and eukaryotes the first step of the initiation stage is the binding of a specific initiator methionyl tRNA and the mRNA to the small ribosomal subunit.

What are the major stages of translation process?

Translation is a process by which the genetic code contained within a messenger RNA (mRNA) molecule is decoded to produce a specific sequence of amino acids in a polypeptide chain. It occurs in the cytoplasm following transcription and, like transcription, has three stages: initiation, elongation and termination.

What are the 4 steps in protein synthesis?

The steps are illustrated in the figure below.

Initiation is the beginning of transcription. It occurs when the enzyme RNA polymerase binds to a region of a gene called the promoter.
Elongation is the addition of nucleotides to the mRNA strand.
Termination is the ending of transcription.