AP BIOLOGY

THE MOLECULAR BASIS OF INHERITANCE

DNA MAKES RNA MAKES PROTEIN

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What is the role of rRNA in protein synthesis?
A
Brings the Amino Acids
B
It is the copied DNA code
C
Reads tRNA
D
Reads mRNA 3 bases at a time
Explanation: 

Detailed explanation-1: -mRNA travels to a ribosome, the site of protein synthesis, and is processed. The ribosome is made of another type of RNA, called rRNA. mRNA is deciphered one codon at a time (1 codon = 3 bases). tRNA then brings corresponding amino acids to the ribosome to be linked together to form a protein.

Detailed explanation-2: -Within the ribosome, the rRNA molecules direct the catalytic steps of protein synthesis-the stitching together of amino acids to make a protein molecule. In fact, rRNA is sometimes called a ribozyme or catalytic RNA to reflect this function.

Detailed explanation-3: -Codons. Cells decode mRNAs by reading their nucleotides in groups of three, called codons.

Detailed explanation-4: -The strand of mRNA is then read in order to make protein. They are read 3 bases at a time. These bases are called codons.

Detailed explanation-5: -Translation is the process of reading the mRNA code in the ribosome to make a protein. Sets of three bases on the mRNA, called codons, are read in order to select the correct amino acid for building a protein.

There is 1 question to complete.