INTRODUCTION
CELL ORGANELLES
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
Cell Wall
|
|
|
Ribosome
|
|
|
Chloroplast
|
|
|
Mitochondria
|
Detailed explanation-1: -Ribosomes are very efficient organelles. A single ribosome in a eukaryotic cell can add 2 amino acids to a protein chain every second.
Detailed explanation-2: -Ribosomes are enzyme complexes that are responsible for protein synthesis (assembling proteins from individual amino acids). Figure 2 Ribosomes can be found free in the cytoplasm (not shown in this diagram), or attached to the outer membrane of the nucleus and the rough endoplasmic reticulum (RER).
Detailed explanation-3: -Mitochondria contain deoxyribonucleic acid (DNA) and ribosomes, protein-producing organelles in the cytoplasm. Within the mitochondria, the DNA directs the ribosomes to produce proteins as enzymes, or biological catalysts, in ATP production.
Detailed explanation-4: -tRNAs (transfer RNAs) carry amino acids to the ribosome. They act as “bridges, ” matching a codon in an mRNA with the amino acid it codes for.