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2 years ago

This is one form of RNA that transports a specific amino acid to a ribosome during protein synthesis.

2 answers:

8 0

The form of RNA that your are referring to is tRNA. tRNA stands for t(ransfer) R(ibosomal) N(ucleic) A(cid). tRNA transports amino acids to the ribosome during protein synthesis.

Kruka [31]2 years ago

5 0

Answer:

tRNA

Explanation:

tRNA is a molecule synthesized from the process of transcribing DNA into segments located in specific regions of chromosomes. It is involved with protein synthesis in the mechanism of gene translation.

This molecule is responsible for driving amino acids to form the polypeptide chains that make up proteins. Its role in gene translation can be understood by parts:

The mRNA (messenger RNA), bringing the DNA coding for protein synthesis, is associated with the smaller ribosome subunit. This ribosome will traverse the ends of mRNA, catalyzing the union of amino acids.
Each tRNA, carrying a specific amino acid, binds to the mRNA codons through its anticodons. The tRNA that initiates protein synthesis is what transports methionine. Its anticodon has the UAC sequence, so it binds to the mRNA codon AUG sequence. In the same way, the other tRNAs fit their amino acids, which, by ribosome action, are joined by peptide bonds.
As the ribosome “glides” over the mRNA molecule, the amino acids brought by the tRNA bind in each predecessor and are carried by the ribosome until it arrives at a stop codon.

By the end of this process, the amino acids brought by the tRNA will then have formed the polypeptide chain. The mRNAs, ribosomes and tRNAs participating in the process separate and the formed protein is released.

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Vitek1552 [10]

Answer:

Explanation:

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2 years ago

Howard is explaining the process by which DNA determines the structure of proteins. His explanation includes this statement. "Th

andrew-mc [135]

Answer:

Transcription and RNA processing (splicing)

Explanation:

Although Howard is almost right, the DNA sequence does not precisely relate to the protein sequence. First of all, the DNA is transcribed to an primary mRNA molecule. Bur before the mRNA is ready to be translated into an amino acid sequence, it must be processed into a mature mRNA.

This includes adding a 3' poly A tail, and a 5' cap, and importantly for this question, splicing.

Splicing is the removal of non protein coding intermediate sequences called introns from the protein coding regions (exons) of a primary mRNA. This means that lots of the DNA sequence is not dictated by the final protein, as many of the intervening sequences have been removed by splicing.

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2 years ago

Which structure allows photosynthesis to begin in a germinating dicot plant? A. Cotyledon B. Endosperm C. Embryonic root D. Apic

slavikrds [6]

You'll want to double check, but I think it's (a) cotyledon.

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2 years ago

A. Red tailed hawks<br> B. White spruces<br> C. Red foxes<br> D. Lynx

vodomira [7]

Answer:

Red foxes

Explanation:

The arrow shows the transfer of energy from the shrew to the red fox

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2 years ago

What are the common promoter elements found in eukaryotic genes, and how are they different from enhancer elements?

V125BC [204]

Answer:

In eukaryotic cells you find core and proximal promoters.

Promotors are specific DNA sequences where transcription factors (proteins) and RNA polymerase binds to initiate transcription. Promotors are located upstream the coding sequence

Core promoters are where RNA polymersae binds and proximal promoters are where transcription factors bind.

Enhancer elements are DNA sequences where transcription factors (proteins) bind to increase the rate of expresion of an specific gene. Enhancers can be located either upstream, downstream or thousands of nucleotids away from the of the coding region.

Explanation:

Promoters and enhancer are key elements for controling gene regulation. Transcription begins when chromatin rearranges from a condensed state to a accesible state, this allow to transcrition factors and RNA polymerase to bind specif DNA sequences (promotors). Proteins bind to enhancers , this complex develops a DNA loop, so that the protein that is bound to the enhancer interacts with the RNA polymersase. When this interaction is made, the activity of the RNA polymerase is increased.

7 0

2 years ago