Which of the statement(s) is (are) not right . a. mRNA: contains protein-building instruction b. tRNA: deliver free amino acids to ribosomes c. rRNA: a major component of ribosomes d. tRNA: deliver free nucleotides to ribosomes.

Hi there!

We can go through the overall function of all three of these:

mRNA: transcribed from the DNA, has the protein's composition written in it, and brings that to a ribosome where the protein will be made

tRNA: looks at the codons (set of 3 nucleotides) on the mRNA and brings amino acids which match up to that codon

rRNA: significant part of the composition of ribosomes

Now, looking at these, and back to the answer choices, we can already see that a, b, and c are correct. d, on the other hand, is incorrect.

Hope this helps! Feel free to let me know if you have any questions about this specific problem.

lunar landing mission. apollo 11 was the first manned mission to land on the moon. the first steps by humans on another planetary body were taken by neil armstrong and buzz aldrin on july 20, 1969. the astronauts also returned to earth the first samples from another planetary body.

explanation: