What are the most important structural differences between ribosomes that make secretory proteins and those that make proteins intended for the cytosol?

In one experiment, you coat a petri dish with fibronectin and proteoglycan and culture cells on a petri dish. Cells adhere to the dish. In another set of experiments (Experiments 1-4), you repeat the previous procedure but this time add one synthetic peptide to each of the culture dishes as the cells are added. What are the outcomes of experiments 1 to 4?  Experiment 1: TGKGDAPC Experiment 2: TGRGDPSC  Experiment 3: RVDSPAC Experiment 4: RGDSPAC  

Epidermolysis bullosa is a group of rare medical conditions that cause fragile, blistering skin. Patients with the disease have genetic alterations in one or multiple proteins involved in the formation of the adhesive structures called hemidesomosomes. These include: (select all that apply)

Inclusion-cell (I-cell) disease is a rare genetic disorder caused by a mutation in the gene that codes for a phosphotransferase enzyme responsible for adding a phosphate group to mannose residues on specific proteins. Which of the following consequences would directly result from defects in this phosphotransferase enzyme? (Select all that apply.)  

Which of the following proteins will originally have a signal peptide/signal sequence on their N-terminus?

You are given two unlabeled tissue samples, one coming from a patient with metastatic cancer and one from a healthy patient. You are asked to differentiate between both samples, but are only given reagents to measure the expression of two types of genes. Which of the following genes would you choose?

Which of the following features or characteristics would you expect will be present or associated with selectins? Select all that apply

Cell adhesion can often be blocked in vitro by treating cells with specific agents. Which of the following interactions would you expect would be affected if A. You treated cells with trypsin, an enzyme that digests proteins?

Which of the following statements about the extracellular matrix (ECM) is false?  

Solve the problem.The annual precipitation for one city is normally distributed with a mean of 309 inches and a standard deviation of 2.8 inches. Fill in the blanks.In 95% of years, precipitation in this city is between and inches.