9. Which two of the following compartments are topologically equivalent? A. Nucleus and peroxisomes B. Cytosol and the extracellular environment C. Cytosol and peroxisomes D. Nucleus and Golgi E. Golgi and lysosomes 10. Which one of the following statements of nuclear protein transport is correct? A. Proteins and mRNA are transported in a bidirectional manner between the nucleus and the cytosol via membrane translocation. B. All proteins can passively diffuse in and out of the nucleus C. Cytosolic proteins are rapidly transported in and out of the nucleus using gated transport by nuclear pore complexes. D. Only proteins without signal peptides are rapidly transported both in and out of the nucleus E. Cell contains only a few relatively simple nuclear pore complexes that allow for uni- directional nuclear protein transport
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The compartments that are topologically equivalent are those that can communicate with each other without having to cross a membrane. From the given options, we can see that Golgi and lysosomes are topologically equivalent as they are both involved in the Show more…
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1-Which structures occur only in eukaryotic cells? Select all that apply. a-Golgi bodies b-Vesicles c-Endoplasmic reticulum d-Ribosomes 2-What are the functions of the nuclear pores? Select all that apply. a-Transport RNA from the cytoplasm to the nucleus for protein synthesis b-Transport RNA from the nucleus to the cytoplasm for protein synthesis c-Transport proteins from the nucleus to the cytoplasm for RNA synthesis d-Transport proteins from the cytoplasm to the nucleus for RNA synthesis 3-Which functions are carried out by smooth endoplasmic reticulum? a-Modifies polypeptides and lipids then sorts and packages the finished products into vesicles b-Folds and modifies proteins and polypeptides via surface ribosomes c-Breaks down cellular wastes and debris via enzymes d-Makes phospholipids and stores calcium
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Which of the following is surrounded by two phospholipid bilayers? a. lysosomes b. ribosomes c. nucleolus d. nucleus
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