For each of the following statements, indicate if it is true of the rough ER only, of the smooth ER only, of both rough and smooth ER, or of neither. a. has ribosomes attached to outer (cytosolic) surface
b. is site for biosynthesis of secretory proteins
c. site for folding of membrane-bound proteins
d. consists of flattened sacs
e. involved in detox of drugs
f. involved in breakdown of glycogen
g. tends to form tubular structures
h. contains less cholesterol than rest of membrane
i. visible only thru electron microscope

a. rough ER only

b. rough ER only

c. rough ER only

d. rough ER only

e. smooth ER only

f. smooth ER only

g. smooth ER only

h. both rough and smooth ER

i. both rough and smooth ER

Explanation:

For H, I know that the smooth ER synthesizes cholesterol. Apparently, the endoplasmic reticulum as a whole has less cholesterol than other cellular membranes. So, I'm not 100% sure about H.

Hope this helps. :)

A researcher is studying how depression tends to be experienced by people of different ages. The researcher interviews depressed adolescents, young adults, individuals in their 30s and 50s, and those over 70 years old. The research design being used is called cross-sectional.

Option: D

Explanation:

A kind of design for observational study is understood as a cross-sectional framework. In a cross-sectional analysis the investigator simultaneously tests the participants in the study's result and exposures. Through cross sectional studies one can estimate the prevalence of disease.

A cross-sectional analysis, for instance, could be used to assess whether vulnerability to specific risk factors would correlate with specific outcomes. For illustration, a researcher may gather cross-sectional data about past smoking habits and current lung cancer diagnoses.