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Q: Which molecule directs the synthesis of a polypeptide at a ribosome?
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The step in protein synthesis where RNA directs the synthesis of a polypeptide or protein is called?

transcription


Is the nucleus the organelle that is the center for protein synthesis?

No. protein synthesis occurs in the ribosome. The ribosome receives the mRNA from the nucleus (code for amino acids) which directs the assembly of the chain of amino acids, but the nucleus is not directly responsible for the creation of the protein. Also, the ribosome isa separate organelle, even if it is attached to the nucleus while assembling the protein chain.


Which describes the flow of information in protein synthesis?

The correct molecular involved in protein synthesis is DNA, messenger RNA, transfer RNA, and polypeptide. When a DNA is read, it produces a messenger RNA, amino acids are then matched with codons (transfer RNA) forming chains of polypeptides.


Role of mRNA during protein synthesis?

copies the genetic code from the DNA molecule and carries it to the ribosome


What directs protein synthesis in the cytoplasm?

The ribosomes


The genetic code directs the synthesis of hundreds of different kinds of?

proteins


What organelle is used during translation?

Translation occurs in the ribosome not the nucleusTranslation takes place in the ribosomes.


The presence of DNA is important for cellular metabolic activities because DNA?

It directs the production of enzymes.


The molecule within a seed which controls and directs reproduction is called?

DNA


What is the organelle in eukaryotic cell nucleus that produces ribosomes?

The nucleolus directs ribosome production.


What organelle directs all cellular activities?

The nucleus directs all the functions of a cell by means of DNA, which controls protein synthesis.


What is the organelle of a necleolus?

Did You Mean "What does the nucleolus do?"??If you did:The nucleolus is the part of the nucleus containing most of the genes that code for the synthesis of ribosomal RNA (rRNA: the RNA molecules found in ribosomes). So rRNA is synthesized within the nucleolus. While still within the nucleolus, these rRNA molecules are assembled, together with many protein molecules. into two subunits of future ribosomes. The subunits leave the nucleus through pores in the nuclear membrane, and enter the cytoplasm.In the cytoplasm, the two ribosome subunits are brought together to form a functional ribosome at an early stage in translation, and separate again when the ribosome has fully translated a molecule of messenger RNA (mRNA). Synthesis of ribosomes happens in the nucleolus.Ribosomes are actually sites of protein synthesis.it's the 'brain' or "center"of the cell.