AP BIOLOGY

THE MOLECULAR BASIS OF INHERITANCE

DNA REPLICATION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What is the flow of genetic information in cells from DNA to protein? (Central Dogma)
A
RNA to DNA to protein
B
DNA to RNA to protein
C
protein to DNA to RNA
D
RNA to protein to DNA
Explanation: 

Detailed explanation-1: -The flow of information from DNA to RNA to proteins is one of the fundamental principles of molecular biology. It is so important that it is sometimes called the “central dogma.” Through the processes of transcription and translation, information from genes is used to make proteins.

Detailed explanation-2: -The basic flow of genetic information in biological systems is often depicted in a scheme known as “the central dogma” (see figure below). This scheme states that information encoded in DNA flows into RNA via transcription and ultimately to proteins via translation.

Detailed explanation-3: -The flow of genetic information is from DNA->RNA->Protein. Replication of DNA is defined as copying of the entire genome before the cell divides into two. Copying of information from the template DNA molecule onto a new messenger RNA molecule is called transcription.

Detailed explanation-4: -The central dogma of molecular biology is a theory stating that genetic information flows only in one direction, from DNA, to RNA, to protein, or RNA directly to protein.

Detailed explanation-5: -Transcription is the process by which the information is transferred from one strand of the DNA to RNA by the enzyme RNA Polymerase.

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