Problem 1 - Biology of Aging

Question

Cells often require protein synthesis to occur quickly in response to a changing intracellular environment. Briefly list and describe the factors that contribute to the rapid pace of protein synthesis.

Step-by-Step Solution

Answer

The rapid pace of protein synthesis is contributed by various factors: the efficiency of the cell's transcription and translation machinery, the availability of mRNA, ribosomes, and tRNAs, the presence of needed amino acids, and favourable cell conditions including temperature and pH.

Step 1: Efficiency of Transcription and Translation

The efficiency of the cell's transcription and translation machinery contribute to rapid protein synthesis. If the machinery is proficient and there are no bottlenecks, then the process of protein synthesis can quickly proceed. Transcription is the process where the DNA is used to make a copy of mRNA. Translation is after transcription, where mRNA is read by ribosome to produce the protein.

Step 2: mRNA, Ribosomes, and tRNAs Availability

Availability of the mRNA, ribosomes, and tRNAs also greatly determine the speed of protein synthesis. If there are enough of these components present, protein synthesis is carried out rapidly. mRNA carries the genetic information from the DNA to the protein synthesis machinery, the ribosome is where protein synthesis occurs, and tRNAs transport the necessary amino acids for the construction of proteins.

Step 3: Presence of needed Amino Acids

Presence of needed amino acids is crucial for speedy protein synthesis. If all necessary amino acids are present, the ribosome can quickly assemble the protein. If not, it will have to wait until the needed amino acids are available, slowing the process.

Step 4: Favourable Cell Conditions

The condition of the cell also plays a role in the rapid pace of protein synthesis. Conditions such as the right temperature and pH can enhance protein synthesis rate.