Total internal reflection (TIRF) microscopy is best used to visualize fluorescently labeled protein activity
A) that is too small to see with regular light microscopy.
B) on the upper surface of a cell.
C) in the Golgi.
D) on the lower surface of a cell.
E) in the nucleus.
Answer: D
You might also like to view...
The primary plating medium used to select out Clostridia spp. would be:
a. anaerobic blood agar. b. laked kanamycin-vancomycin (LKV) blood agar. c. phenylethyl alcohol agar (PEA). d. thioglycollate.
How does gibberellic acid affect stem length in pea plants?
a. Plants with normal stem length have higher levels of gibberellic acid. b. Plants with short stem length have higher levels of gibberellic acid. c. Plants with normal stem length have the dominant allele Le that encodes an enzyme to degrade gibberellic acid. d. Plants with short stem length have the dominant allele Le that encodes an enzyme to degrade gibberellic acid. e. Plants with short stem length are homozygous recessive for the allele le that encodes an enzyme to degrade gibberellic acid.
A muscle fiber contracts by a sequence of events initiated by the binding of acetylcholine to its receptor. Which of the following is the correct sequence?I - The calcium-troponin complex pulls tropomyosin away from the myosin-binding sites of actin.II - The freed-sites of actin bind to myosin to form cross-bridges.III - Calcium ion binds to the troponin.
A. I, II, and III B. III, II, and I C. I, III, and II D. II, III, and I E. III, I, and II
Currently, the human population of the world
A. has reached its carrying capacity. B. is stable. C. is declining in much of the world. D. is increasing rapidly.