AP BIOLOGY

THE MOLECULAR BASIS OF INHERITANCE

DNA MAKES RNA MAKES PROTEIN

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which of the following is the BEST explanation of the role of DNA and RNA in making proteins?
A
DNA unwinds into two separate strands, and an exact copy of each is produced during replication. During translation, a DNA strand is used to produce a complementary strand of mRNA, with uracil taking the place of thymine. During transcription, each set of three codons in the mRNA results in an amino acid being added to a chain, and a protein is formed.
B
DNA unwinds into two separate strands, and a complementary copy of each is produced during replication. During transcription, a DNA strand is used to produce a complementary strand of mRNA, with uracil taking the place of adenine. During translation, each base in the mRNA results in an amino acid being added to a chain, and a protein is formed.
C
DNA unwinds into two separate strands, and a complementary copy of each is produced during replication. During transcription, a DNA strand is used to produce a complementary strand of mRNA, with uracil taking the place of thymine. During translation, each set of three bases in the mRNA results in an amino acid being added to a chain, and a protein is formed.
D
DNA unwinds into two separate strands, and an exact copy of each is produced during replication. During transcription, a DNA strand is copied to produce mRNA, which is an exact copy of the DNA strand except that uracil takes the place of thymine. During translation, each set of three bases in the mRNA results in a protein with a specialized function being formed.
Explanation: 

Detailed explanation-1: -Which of the following is the BEST explanation of the role of DNA and RNA in making proteins? DNA unwinds into two separate strands, and an exact copy of each is produced during replication. During translation, a DNA strand is used to produce a complementary strand of mRNA, with uracil taking the place of thymine.

Detailed explanation-2: -Explanation: The central dogma of biology is best described by DNA is transcribed to RNA, which is translated to protein. The genetic material (DNA) is transcribed into mRNA (RNA) which is than translated into proteins.

Detailed explanation-3: -It is found in all biological cells and usually occurs in the cytoplasm of the cell although its synthesis takes place in the nucleus. While DNA provides the code for the cell’s activities, RNA is responsible for converting that code into proteins that carry out various cellular functions.

Detailed explanation-4: -Nucleic acids, deoxyribonucleic acid (DNA) and ribonucleic acid (RNA), carry genetic information which is read in cells to make the RNA and proteins by which living things function. The well-known structure of the DNA double helix allows this information to be copied and passed on to the next generation.

Detailed explanation-5: -The central dogma of molecular biology suggests that the primary role of RNA is to convert the information stored in DNA into proteins.

There is 1 question to complete.