When discussing the various functions of the cellular parts, the pathophysiology professor asks a group of students, "where are the primary sites of protein synthesis located in a cell? " what student response would be correct?

Answer

RIBOSOMES on the ROUGH ENDOPLASMIC RETICULUM

Explanation:

This is the site of protein synthesis usually find attached to the rough endoplasmic reticulum or  freely on the cystosol,

When they are attached to the  endoplasmic reticulum they appeared as back dots which makes the surface of ER to appear rough, hence the name ROUGH ER. Smooth ER, lacks Ribosomes, and therefore appears smooth,

Ribosomes  are made up of PROTEIN AND RNA.

They are 25nm in diameter;when viewed under high magnification, where theymade up of  two sub-units  the small and large units.

The protein synthesize by the Ribosomes are passed into the sacs  of Rough E.R  for transportation,

Basically, a complete Ribosomes is refereed to as 70S for prokaryotic ribosomes and 80S for Eukaryotic Ribisomes.This refers to their sedimentation Co-efficient in Svedberg units,the Eukaryotes sediment faster than the Prokaroytes

you are certainly talking about this picture:

a: is the label of the white square, it is showing the  replication fork, formed by helicase (d) ==> so it is the site of dna separation and replication 

b: is a new dna brand that is following directly the replication fork, so it is continuous ==> built continuously from 5' to 3

c: dna polymerase cannot replicate dna on its own, it needs the of their proteins, and one of them plays the role of a clamp which fixes  the dna with the dna template and increases  the processivity of the enzyme. ==>   stops polymerase from falling off the  template.

d: is the enzyme responsible for forming the replication fork (helicase) ==> unwinds and separates dna into two strands

e: is the delayed strand, it is built  in the opposite sense of the helicase, so dna will be built in fragments ==> built  fragments from 5' to 3 joins

and finally f: is the enzyme that builds  the new dna strand (dna polymerase) ==>   adds nucleotides to make a new dna helix.

credit: gradman555p98x9p

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