Question

1) If an mRNA consists of 150 nt, how long is the protein it codes for?

a) 30 aminoacids b) 50 amino acids c) not enough info

- I think it is 50 but I'm not sure about the answer

2) Amino acids are connected to tRNAs at their_________

a) Carboxyl group b) amino group c) side chain

- I think the answer is amino group but I could be wrong

3) Proteins are synthesized from _______

a) N end to C end

b) C end to N end

Answer 1

Answer 1)

Answer is: a

mRNA nucleotide consists of 150. Then the protein sequence must be of 30 amino acids. Because one amino acid is encoded by three nucleotides.

Then there is also found some intron sequences and also some UTR's region in mRNA. That's why most appropriate answer is 30 amino acids.

Answer 2)

Answer is: a

Amino acid are connected to tRNA at COOH group. This COOH group is also known as carboxyl group. The carboxyl group of amino acid and the OH group of tRNA joined together.

Answer 3)

Answer is a

Protein synthesis occurs feom the N to C terminal. Because amino group is found at first amino acid. And carboxyl group is found at the C terminal end of amino acid.