Question

where does translation occur?
a in a mitochondrion
b at a ribosome
c inside a chloroplast
d in the nucleus
question 21
what gets produced at the end of translation?
a a protein molecule
b an mrna molecule
c a lipid molecule
d a trna molecule
question 22
what is the role of trna in translation?
a trna molecules carry dna out of the nucleus
b each trna brings amino acids to the ribosome
c trna molecules form ribosomes
d trna molecules help produce mrna in the nucleus

Explanation:

Question 1 (Where does translation occur?):

Translation is the process of protein synthesis. Ribosomes are the cellular structures where amino acids are assembled into proteins based on mRNA instructions. Mitochondria and chloroplasts have their own translation machinery but the primary site of translation in a cell (for nuclear - encoded genes) is ribosomes. The nucleus is where transcription (not translation) occurs for nuclear genes.

Translation is the process of converting the genetic code in mRNA into a sequence of amino acids, which then fold into a protein molecule. mRNA is produced during transcription, lipids are not produced by translation, and tRNA is involved in bringing amino acids but is not the end product of translation.

tRNA (transfer RNA) has an anticodon that pairs with the codon on mRNA and carries the corresponding amino acid to the ribosome, where it is added to the growing polypeptide chain. tRNA does not carry DNA out of the nucleus (DNA doesn't leave the nucleus in this way), ribosomes are made of rRNA and proteins (not tRNA), and tRNA is not involved in producing mRNA (that's transcription and involves RNA polymerase).

Answer:

b. at a ribosome

Question 2 (What gets produced at the end of translation?):