Which of the statement is not true for compounds like glycoprotein and glycolipids____________?
Correct answer: D. Both are produced and secreted by endoplasmic reticulum
- A. They are conjugated molecules of carbohydrates
- B. Both have role in the extra cellular matrix of animals and bacterial cell wall
- C. They are components of biological membranes.
- D. Both are produced and secreted by endoplasmic reticulum
Explanation
Glycoproteins and glycolipids are carbohydrate-containing conjugated molecules found in membranes and in important extracellular structures. They are not both produced and secreted by the endoplasmic reticulum: the ER makes many glycoproteins, whereas glycolipid synthesis mainly involves membranes such as the ER and Golgi, and secretion is not performed by the ER itself.
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About Conjugated Molecules
Conjugated molecules contain a non-protein component attached to a protein portion, giving the molecule properties that a simple protein lacks. The content includes glycoproteins, lipoproteins, phosphoproteins, nucleoproteins, chromoproteins and metalloproteins, with attention to their prosthetic groups and roles in transport, protection, catalysis and cellular structure.
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