AP BIOLOGY

Detailed explanation-1: -Ribosome is the site of protein synthesis in a cell. Q. Ribosomes are essential for protein synthesis, but they are present in mitochondria and plastids, the sites of respiration and photosynthesis.

Detailed explanation-2: -The ribosome is universally responsible for synthesizing proteins by translating the genetic code transcribed in mRNA into an amino acid sequence. Ribosomes use cellular accessory proteins, soluble transfer RNAs, and metabolic energy to accomplish the initiation, elongation, and termination of peptide synthesis.

Detailed explanation-3: -Answer and Explanation: Ribosomes have two major components: rRNA (ribosomal RNA) and proteins. Therefore, the statement that “ribosomes are made of proteins and RNA” is true.

Detailed explanation-4: -Answer and Explanation: b) Ribosomes are found in eukaryotes but not in prokaryotes. Ribosomes are present in both eukaryotic and prokaryotic cells.

Detailed explanation-5: -Answer and Explanation: The correct answer is A. The sites of protein synthesis are the mitochondria of cells.. This is not a true statement about protein synthesis.