Question

Which of the following statements is false?

a. Proteins are composed of amino acids.
b. The first step in protein synthesis is translation.
c. The number and sequence of amino acids determines protein function.
d. Proteins are manufactured by the ribosomes.
e. The sequence of amino acids in a protein is ultimately determined by the sequence of DNA bases.

Answer 1

The false statement is that the first step in protein synthesis is translation. The correct first step is transcription, where DNA is transcribed into mRNA before translation at the ribosome.

Step-by-step explanation:

The statement that is false is "The first step in protein synthesis is translation." Protein synthesis actually begins with transcription, where the genetic code from DNA is transcribed into messenger RNA (mRNA). This mRNA then travels to the ribosomes, where translation occurs. During translation, tRNA molecules match the mRNA codons to specific amino acids, which are then strung together to form a polypeptide chain, becoming a protein .It is true that proteins are composed of amino acids and manufactured by ribosomes. Furthermore, both the number and sequence of amino acids determines a protein's function, and the sequence of amino acids in a protein is ultimately determined by the sequence of DNA bases.