Follow the route of pepsinogen secreted by zymogen cells:
Correct answer: B. RER → SER → Golgi complex → Secretory vesicles
- A. SER → Mitochondria → Golgi complex → Secretory vesicles
- B. RER → SER → Golgi complex → Secretory vesicles
- C. SER → RER → Golgi complex → Secretory vesicle
- D. Golgi complex → RER → SER → Secretory vesicles
Explanation
This statement is correct because proteins destined for secretion or membrane insertion are synthesized on the Rough Endoplasmic Reticulum (RER). From the RER, they are transported to the Smooth Endoplasmic Reticulum (SER) and then to the Golgi complex. In the Golgi complex, proteins undergo modification, such as glycosylation and phosphorylation. After modification, the proteins are packaged into secretory vesicles. These vesicles then fuse with the plasma membrane, releasing the proteins outside the cell or inserting them into the membrane. This process illustrates the important role of the ER and Golgi complex in protein synthesis and secretion.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Cytoplasmic Organelles
Cytoplasmic organelles are the specialized structures suspended in cytoplasm, including mitochondria, ribosomes, endoplasmic reticulum, Golgi apparatus, lysosomes, vacuoles and centrosomes. Questions compare their structures and functions in animal and plant cells, including chloroplasts and the role of the endomembrane system in transport and secretion.
Practise Cell Structure and Function
2,478 free Cell Structure and Function MCQs from Biology, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Biology questions like this
Biology is on 8 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Cytoplasmic Organelles questions
Most scientists subscribe to the theory of endosymbiosis to explain the presence of mitochondria in eukaryotic cells. According to the theory of endosymbiosis, early pre-eukaryotic cells phagocytosed free living prokaryotes, but failed to digest them. As a result, these prokaryotes remained in residence in the pre-eukaryotes, and continued to generate energy. The host cells were able to use this energy to gain a selective advantage over their competitors, and eventually the energy-producing prokaryotes became mitochondria.In many ways, mitochondria are different from other cellular organelles, and these differences puzzled scientists for many years. The theory of endosymbiosis concisely explains a number of these observations about mitochondria. Perhaps most of all, the theory explains why aerobic metabolism is entirely limited to this one organelle, while other kinds of metabolism are more distributed in the cellular cytosol.A scientist is presenting her evidence in support of the theory of endosymbiosis. Which of the following assertions is FALSE?
Most scientists subscribe to the theory of endosymbiosis to explain the presence of mitochondria in eukaryotic cells. According to the theory of endosymbiosis, early pre-eukaryotic cells phagocytosed free living prokaryotes, but failed to digest them. As a result, these prokaryotes remained in residence in the pre-eukaryotes, and continued to generate energy. The host cells were able to use this energy to gain a selective advantage over their competitors, and eventually the energy-producing prokaryotes became mitochondria. In many ways, mitochondria are different from other cellular organelles, and these differences puzzled scientists for many years. The theory of endosymbiosis concisely explains a number of these observations about mitochondria. Perhaps most of all, the theory explains why aerobic metabolism is entirely limited to this one organelle, while other kinds of metabolism are more distributed in the cellular cytosol.Many organisms have evolved the use of an uncoupling protein, UCP1. UCP1 is able to generate heat for animals that must live in the cold, and exerts its effect in the mitochondria. UCP1 functions similarly to ATP synthase, in that it allows protons out of the intermembrane space and into the mitochondrial matrix, but generates energy in the form of heat instead of ATP. Where are we most likely to find UCP1?
The organelle which will be more active in liver cells after alcohol intake is
Why do ribosomes require Mg²+ ions?
Which one of the following type of plastids helps in pollination and seed dispersal?
The transport of secretory proteins takes place through organelles in which of the following order?