Multiple choice Which of the following cell organelles are associated with endoplasmic reticulum? Chromoplasts Leucoplasts Chloroplast Ribosomes Reveal answer Fill a bubble to check yourself D Correct answer Explanation Ribosomes occur, both as free in the cytoplasm and as associated with endoplasmic reticulum. Ribosome are of 80 S kind. There are two subunits. Ribosomal RNA and proteins occur in the constitution of ribosomes.