Smooth endoplasmic reticulum (ER) synthesizes lipids and detoxifies harmful substances. RNA synthesis occurs in transcription but does not involve Smooth ER. Proteins are synthesized by Rough ER and ribosomes.
Q. Which cell organelle synthesizes phospholipids and steroids?
smooth endoplasmic reticulum
Q. Which organelle is involved in the synthesis of triacylglycerols phospholipids and steroids?
The major “lipid factory” within the cell is the endoplasmic reticulum (ER). It is able to synthesize the bulk of structural phospholipids, sterols, and storage lipids such as triacylglycerols and steryl esters (van Meer et al. 2008).
Q. Which of the following is phospholipid?
Lecithin and cephalin both are phospholipids. Lecithin is probably the most common phospholipid which contains the amino alcohol, choline. It is found in egg yolks, wheat germ, and soybeans.
Q. Which of the following is the most common phospholipid in cell membranes?
Phosphoglycerides (also known as glycerophospholipids) are the most abundant phospholipids in cell membranes.
Q. What is the major phospholipid found in cell membranes quizlet?
– The major type of lipid found in the cell membrane is phospholipids. – Phospholipids have both HYDROPHOBIC and HYDROPHILIC regions, making them AMPHIPATHIC. – The hydrophobic region is a fatty acid tail. – The hydrophilic region is a so-called head group consisting of glycerol, a phosphate group, and a polar group.
Q. How can a phospholipid mix with water?
When placed in water, hydrophobic molecules tend to form a ball or cluster. The hydrophilic regions of the phospholipids tend to form hydrogen bonds with water and other polar molecules on both the exterior and interior of the cell.
Q. What happens when phospholipids are mixed with water?
When phospholipids are mixed with water, they spontaneously rearrange themselves to form the lowest free-energy configuration. This means that the hydrophobic regions find ways to remove themselves from water, while the hydrophilic regions interact with water. The resulting structure is called a lipid bilayer.
Q. Which foods contain phospholipids?
Phospholipids are found in foods like meat, eggs, seed oils, and seafood. They’re also found in some plant foods but in much smaller amounts. Phospholipids can also be found in supplements. Marine phospholipids are derived from fish, algae, and shellfish like krill.
Q. What property of the phospholipid bilayer allows proteins?
Lipid bilayers are like viscous fluids because the fatty acid chains in the phospholipids are often unsaturated. This helps proteins and phospholipids diffuse laterally through the membrane.
