Question

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Answer 1

1. Answer;

A. The mRNA code determines which tRNA molecules are used.

Explanation;

• Messenger RNA molecules carry the information from the DNA that is used for the synthesis of proteins. Transfer RNA or tRNA carry amino acids to the ribosomes during the process of protein synthesis.
• mRNA contains the coding sequences for protein formation which is in form of codons, each codon codes for a particular amino acid.
• tRNA reads the message of nucleic acids, or nucleotides on the messenger RNA and translates it into amino acids or proteins. This process of synthesizing proteins from an mRNA template is known as translation.

2. Answer;

D. Ribosome

Explanation;

• Ribosomes are organelles that re found in the cells of organisms either freely suspended in the cytoplasm or attached on the rough endoplasmic reticulum.
• Ribosomes are very important organelles in the cells of organisms since it is where the process of translation or protein synthesis takes place.
• Ribosomes are formed by an association of proteins and ribosomal RNA, they move along mRNA molecule to catalyze assembling of amino acids into proteins.

3. Answer;

B. Methionine, Proline, leucine, Threoine.

Explanation;

• The mRNA molecule contains the coding sequences for protein formation which is in form of codons, each codon codes for a particular amino acid.
• There are 20 amino acids involved in the process of protein formation (translation). One amino acid can be encoded by more than one codon on the mRNA sequence.
• Methionine amino acid is encoded by a single codon AUG, amino acid Proline is encode by a codons CCT, CCC, CCA, and CCG .
• Leucine is encoded by codons, UUA,UUG, CUU, CUC, CUA, and CUG, while Threonine is encoded by codons ACT, ACC, ACA, and ACG.

Therefore, an mRNA sequence with the code AUG-CCA-UUG-AGG, will code form the amino acid;  Meothionine-Proline-Leucine-Threonine

Answer 2

b.)The mRNA code determines which tRNA molecules are used. 

D. Ribsome

A. Meothionine, Serine, Glutamine, Tryptophan