1.A researcher alters the DNA-binding domain of a glucocorticoid receptor to that of an estrogen receptor. How would the cells respond to exposure to glucocorticoids?
a. They would bind estrogen, and initiate estrogen-dependent synthesis
b. They would bind glucocorticoids, and initiate testosterone-dependent synthesis
c. They would bind estrogen, and initiate testosterone-dependent synthesis
d. They would bind glucocorticoids, and initiate estrogen-dependent synthesis
e. They would bind neither hormone
2. All of the following statements about mitochondria are valid except:
a. The outer membrane of the mitochondrion is more like a eukaryotic cell plasma membrane.
b. The outer membrane of the mitochondrion is more like a prokaryotic outer membrane.
c. Mitochondria have ribosomes that are a different size from those in the rest of the cell.
d. Mitochondria have their own DNA that encodes very few proteins.
e. Mitochondria store Calcium ions
3.The unique length-tension relationship of muscle is due to:
a. the limit on the amount of ATP the muscle can produce.
b. the fact that tension is proportional to the amount of overlap between actin fibers and myosin heads
. c. the ability of kinesin to move along filaments.
d. the limit imposed on cross-sectional area of muscle in organisms.
e. the shortening of actin filaments.
4.The enzyme âFlippaseâ causes the flip-flop of dolichol phosphate from one side of a membrane to the other as part of the process leading to:
a. binding of a receptor by a ligand
b. glycosylation of newly synthesized proteins
c. transfer of proteins to the golgi apparatus.
d. membrane fusion during secretion
e. formation of coated vesicles
5. What do the photosystems of a chloroplast capture from the splitting of water during the light reactions?
a. ATP
b. Protons
c. electrons
d. neutrons
e. oxygen
