#Question id: 4284
#Unit 3. Fundamental Processes
Assays for following the trafficking of proteins through the secretory pathway in living cells require
a. sensitive methods to distinguish the very small differences in organelle density caused by passage of a wave of protein transport through the organelle.
b. a way to identify compartments where labeled proteins are located.
c. the use of cell types that are highly dedicated secretory cells.
d. the use of enucleate cells in order to eliminate the nucleus as a site of labeling.
e. a way to label a cohort of secretory proteins
#Question id: 12188
#Unit 2. Cellular Organization
#Question id: 19364
#Unit 13. Methods in Biology
#Question id: 1505
#Unit 4. Cell Communication and Cell Signaling
Which of the following types of genes have not been identified as oncogenes?
#Question id: 2529
#Unit 2. Cellular Organization
Cell walls commonly are classified into two major types. This classification is based not on structural or biochemical differences;
A) primary walls and
B) secondary walls
i) walls formed during cell growth
ii) walls that are formed after cell enlargement stops
iii) multilayered walls that are strengthened and waterproofed by lignin
iv) Usually they are thin and simple, but some times may be thick and multilayered, such as those found in collenchyma or in the epidermis
v) highly specialized in structure and composition, reflecting the differentiated state of the cell
Which of the following is the correctly represents features of primary and secondary walls?