Transcription is the transfer of genetic code from a DNA molecule to
A. RNA molecule
B. Second DNA molecule
C. Ribosomal sub unit
D. Sequence of amino acids in a protein molecule
Answer
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Hint: Transcription is one among the first steps in the gene expression process. Transcription and translation are two processes that assist in the transmission of genetic information from DNA to proteins. Only one strand of DNA, known as the template strand, is duplicated during transcription, and the RNA produced is known as mRNA.
The primary goal of transcription is to create an RNA copy from a DNA sequence. The information used to encode a protein is carried by the RNA transcript.
Complete answer:
Option A: Transcription is the process by which the genetic code encoded on DNA is transferred to the mRNA molecule. When a certain protein is required, the mRNA molecule is produced. The information in a gene, which is a specific area of DNA, is transferred to a single-stranded RNA molecule. In RNA, the thymine in DNA is replaced with uracil. The enzyme RNA polymerase aids in the reading of the template strand and the creation of the mRNA molecule.
So option A is correct.
Option B: The process of replicating a double-stranded DNA molecule into two identical DNA molecules is known as DNA replication.
So option B is not correct.
Option C: The process by which the genetic code encoded on DNA is transferred to the mRNA molecule is known as transcription. The mRNA molecule is created when a specific protein is required. A single-stranded RNA molecule receives the information from a gene, which is a specific section of DNA. In RNA, the uracil substitutes the thymine in DNA.
So option C is not correct.
Option D: Translation is the process through which the mRNA codes for a certain protein. The ribosome converts the mRNA produced by DNA into a chain of specific amino acids during this process.
So option D is not correct.
So option A is the correct answer.
Note:
The primary goal of transcription is to create an RNA copy from a DNA sequence. The information used to encode a protein is carried by the RNA transcript.
Complete answer:
Option A: Transcription is the process by which the genetic code encoded on DNA is transferred to the mRNA molecule. When a certain protein is required, the mRNA molecule is produced. The information in a gene, which is a specific area of DNA, is transferred to a single-stranded RNA molecule. In RNA, the thymine in DNA is replaced with uracil. The enzyme RNA polymerase aids in the reading of the template strand and the creation of the mRNA molecule.
So option A is correct.
Option B: The process of replicating a double-stranded DNA molecule into two identical DNA molecules is known as DNA replication.
So option B is not correct.
Option C: The process by which the genetic code encoded on DNA is transferred to the mRNA molecule is known as transcription. The mRNA molecule is created when a specific protein is required. A single-stranded RNA molecule receives the information from a gene, which is a specific section of DNA. In RNA, the uracil substitutes the thymine in DNA.
So option C is not correct.
Option D: Translation is the process through which the mRNA codes for a certain protein. The ribosome converts the mRNA produced by DNA into a chain of specific amino acids during this process.
So option D is not correct.
So option A is the correct answer.
Note:
| REPLICATION | TRANSCRIPTION |
| It is the process of creating new DNA copies. | It is the process of copying DNA and converting it to RNA. |
| It is necessary for cell development and division to be regulated. | It's a technique for controlling gene expression. |
| Genetic information is passed down via the generations. | From DNA to RNA, genetic information is transferred. |
| The S phase of the cell cycle is when the cell divides. | Transcription occurs during the cell cycle's G1 and G2 phases. |
| To begin replication, an RNA primer is required. | This process can begin without the use of primers. |
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