What would be the correct base sequence in mRNA for the given DNA strand?

What would be the correct base sequence in mRNA for the given DNA strand?

As the RNA polymerase continues down the strand of DNA, more nucleotides are added to the mRNA, thereby forming a progressively longer chain of nucleotides. This process is called elongation. So, the correct answer is option C.

What will happen if A base sequence of A strand of DNA is changed from ATG to ATC?

A DNA molecule with the sequence AGCTCA was used as a template for making mRNA. What will happen if a base sequence of a strand of DNA is changed from ATG to ATC? transcription happens in the cytoplasm. Prokaryotic cells do not have a nucleus.

Which sequence of bases would result in the strand of mRNA?

DNA utilizes four bases, adenine (A), guanine (G), cytosine (C), and thymine (T), in its code. RNA also uses four bases. However, instead of using ‘T’ as DNA does, it uses uracil (U). Therefore, if your DNA sequence is 3′ T C G T T C A G T 5′, the mRNA sequence would be 5′ A G C A A G U C A 3′.

Which DNA strand is the template for mRNA?

antisense strand
The DNA strand that mRNA is built from is called the template strand because it serves as a template for transcription. It is also called the antisense strand. The template strand runs in a 3′ to 5′ direction.

What is the mRNA sequence?

The mRNA sequence is thus used as a template to assemble—in order—the chain of amino acids that form a protein. Multiple codons can code for the same amino acid. The codons are written 5′ to 3′, as they appear in the mRNA. AUG is an initiation codon; UAA, UAG, and UGA are termination (stop) codons.

What are the 2 steps 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 three steps: initiation, elongation, and termination.

What will happen if the base sequence of DNA will change?

A mutation may change a trait in a way that may even be helpful, such as enabling an organism to better adapt to its environment. The simplest mutation is a point mutation. This occurs when one nucleotide base is substituted for another in a DNA sequence. The change can cause the wrong amino acid to be produced.

Which of the four bases found in DNA is not present in messenger RNA?

The four bases that make up this code are adenine (A), thymine (T), guanine (G) and cytosine (C). Bases pair off together in a double helix structure, these pairs being A and T, and C and G. RNA doesn’t contain thymine bases, replacing them with uracil bases (U), which pair to adenine1.

What is the sequence of mRNA?

mRNA codons are read from 5′ to 3′ , and they specify the order of amino acids in a protein from N-terminus (methionine) to C-terminus. Translation involves reading the mRNA nucleotides in groups of three; each group specifies an amino acid (or provides a stop signal indicating that translation is finished).

How is the sequence of bases in DNA written?

Usually when a sequence is written, it is written as the top strand. So the DNA would look like: mRNA is made off the bottom strand, and makes a complement of the bottom strand (which means the mRNA is the same sequence as the top strand, but in the form of RNA).

How is the coding strand of DNA different from messenger RNA?

The codes in the coding strand of DNA and in messenger RNA aren’t, of course, identical, because in RNA the base uracil (U) is used instead of thymine (T). The table shows how the various combinations of three bases in the coding strand of DNA are used to code for individual amino acids – shown by their three letter abbreviation.

What happens when DNA is transcribed into messenger RNA?

You will remember that when DNA is transcribed into messenger RNA, the sequence of bases remains exactly the same, except that each thymine (T) is replaced by uracil (U). That gives you the table: In many ways, this is the more useful table.

How are base sequences used to code for amino acids?

the genetic code How the base sequences in DNA and RNA code for particular amino acids. THE GENETIC CODE This page looks at how the base sequences in DNA and RNA are used to code for particular amino acids when it comes to building protein chains. It is designed for 16 – 18 year old chemistrystudents.