Please explain why 20) Which structure below is independent of the endomembrane
ID: 211092 • Letter: P
Question
Please explain why 20) Which structure below is independent of the endomembrane system? A) nuclear envelope B) peroxisomes C) Golgi apparatus D) plasma membrane E) lysosomes 21) Tay-Sachs disease is a human genetic abnormality that results in cells accumulating and becoming clogged with very large, complex, undigested lipids. Which cellular organelle is most likely defective in this condition? A) the lysosome B) the Golgi apparatus C) the smooth endoplasmic reticulum D) the rough endoplasmic reticulum E) the mitochondria 22) Motor proteins provide for molecular motion in cells by interacting with what types of cellular structures? A) membrane proteins of the inner nuclear envelope B) free ribosomes and ribosomes attached to the ER C) components of the cytoskeleton D) cellulose fibers in the cell wall E) intermediate filaments 23) Cells require which of the following to form cilia or flagella? A) tubulin B) laminin C) actin D) intermediate filaments F) keratinExplanation / Answer
Answer:
20). B. Peroxisome
Explanation:
In eukaryotes the organelles of the endomembrane system include: the nuclear membrane, the endoplasmic reticulum, the Golgi apparatus lysosomes, vesicles, endosomes and the cell membrane, among others.
21). A. The lysosome
Explanation:
Lysosomes are membrane-bound organelles which contain hydrolases that degrade unneeded proteins and infectious bacteria. When these substrates accumulate without degradation inside the lysosome, the cells die lysosomal storage diseases.
22). C. Components of the cytoskeleton
23). A. Tubulin
Explanation:
In eukaryotic cells, cilia and flagella contain the motor protein dynein and microtubules, which are composed of linear polymers of globular proteins called tubulin.