Which of the following organelles produces and modifies proteins that will be secreted?
The endoplasmic reticulum (ER) is involved in the synthesis of lipids and synthesis and transport of proteins. The Golgi apparatus modifies, sorts, and packages different substances for secretion out of the cell, or for use within the cell.
Which of the following modifies proteins and lipids that will be secreted?
The endoplasmic reticulum (ER) is a series of interconnected membranous sacs and tubules that collectively modifies proteins and synthesizes lipids.
What is the most likely pathway taken by a newly synthesized protein that will be secreted by a cell?
secretory pathway
Where are Thylakoids DNA and ribosomes found?
Thylakoids DNA and ribosomes are all components found in chloroplast of the plant cell. Chloroplast is the double membrane-bound organelle present in plants.
Which organelle is called suicidal bags?
Lysosomes
Which organelle has its own DNA in animal cells?
Mitochondria
What cell part contains ribosomes?
Ribosomes are found ‘free’ in the cell cytoplasm and also attached to rough endoplasmic reticulum. Ribosomes receive information from the cell nucleus and construction materials from the cytoplasm. Ribosomes translate information encoded in messenger ribonucleic acid (mRNA).
Which cell is bigger prokaryote or eukaryote?
Eukaryotic cells are generally bigger — up to 10 times bigger, on average, than prokaryotes. Their cells also hold much more DNA than prokaryotic cells do.
What are the main function of ribosomes?
Ribosomes have two main functions — decoding the message and the formation of peptide bonds. These two activities reside in two large ribonucleoprotein particles (RNPs) of unequal size, the ribosomal subunits. Each subunit is made of one or more ribosomal RNAs (rRNAs) and many ribosomal proteins (r-proteins).
Is nucleolus an organelle?
The nucleolus: an organelle formed by the act of building a ribosome.
Why is ribosome not an organelle?
Ribosomes are different from other organelles because they have no membrane around them that separates them from other organelles, they consist of two subunits, and when they are producing certain proteins they can become membrane bound to the endoplasmic reticulum, but they can also be free floating while performing …
Why do ribosomes have two subunits?
Ribosome Structure and Composition. Ribosomes are composed of ribosomal RNA (rRNA) and protein. Ribosomes are composed of two subunits that come together to translate messenger RNA (mRNA) into polypeptides and proteins during translation and are typically described in terms of their density.
Are ribosomes membrane bound in eukaryotes?
This protein-synthesizing organelle is the only organelle found in both prokaryotes and eukaryotes, asserting the fact that the ribosome is a trait that evolved early on, most likely present in the common ancestor of eukaryotes and prokaryotes. Ribosomes are not membrane bound.