6. Which sequence reflects the locations that a secretory protein will visit on
ID: 196213 • Letter: 6
Question
6. Which sequence reflects the locations that a secretory protein will visit on its way from its production to its secretion outside the cell? A) rough ER, secretory vesicle, Golgi complex, ER vesicle B) rough ER, Golgi complex, smooth ER, ER vesicle C) nucleus, Golgi complex, rough or smooth ER, secretory vesicle D) smooth ER, rough ER, Golgi complex, secretory vesicle E) rough ER, ER vesicle, Golgi complex, secretory vesicle 7. Which organelle has only a single membrane around it? A) ribosome B) nucleus C) mitochondrion D) chloroplast E) peroxisome 8. Prokaryotes have S ribosomes with S and S subunits, whereas eukaryotes have S ribosomes with A) 80, 50, 30; 100, 60, 40 B) 100, 60, 50; 90, 60, 40 C) 70, 50, 30; 80, 60, 40 D) 70, 40, 30; 80, 50, 30 E) 80, 60, 40; 70, 50, 30 S and S subunits. 9. The major structural elements of the cytoskeleton areExplanation / Answer
6. A secretory protein will be synthesized in the rough endoplasmic reticulum. Protein synthesis take place in the ribosome present of RER. These proteins are packaged in ER vesicles and transported to the Golgi. In the Golgi, the proteins are segregated as secretory and then packaged in secretary vesicles. The secretory vesicles will then transport the cell membrane for secretion. The vesicles fuse with the cell membrane and release their contents out of the cell.
Right option is E.
7. Peroxisomes are small organelles that contain catalase and oxidases. They protect the cell against reactive oxygen species. They are ubiquitous single membrane bound organelle. Bothe mitochondria and chloroplast have more membranes. Ribosomes lack membranes. Nucleus has a two-layered nuclear envelope.
Right option is E.
8. Eukaryotes have an 80S ribosome, which is made up of 60S and 40S subunit. The 60S subunit has 28S, 5.8S and 5S rRNA, while the 40S subunit has 18S rRNA. Prokaryotes have a 70S ribosome, which is made up of 50S and 30S subunit. The 60S subunit has 23S and 5S rRNA, while the 50S subunit has 16S rRNA.
Right option is C.
9. Major structural elements of the cytoskeleton is microtubules, microfilaments and intermediate filaments. Microtubules maintain axons and maintain shape, orient cellulose microfibrils (in plants), mitotic and meiotic spindles for chromosome movements; and vesicle movement. Microfilaments are involved in muscle contraction and cell migration. Intermediate filaments are structural protein such as keratins that present in skin, nails, hair.
Right option is B.
10. Mitochondrial DNA is circular double stranded that is inherited from the mother. It houses the genes of the oxidative phosphorylation that results in generation of ATP. It is smaller than nuclear DNA.
Right option is B.
11. Enthalpy is known as heat content and is equal to the internal energy of the system plus product of pressure and volume.
Right option is E.
As per Chegg’s rule, only one question is mandatory to be answered.
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