Which of the following lack a nucleus and are structurally simple?
A. Eukaryotes
B. Prokaryotes
C. Fungi
D. Algae
E. Protists
Answer: B
You might also like to view...
Once bound to a hormone, this receptor becomes active and catalyzes the transfer of a phosphate group to itself or intracellular proteins.
A. G-protein coupled receptor B. enzyme-linked receptor C. ligand-gated ion channel receptor D. mechanoreceptor E. thermoreceptor
In which of the following areas of the human body do secretions play the greatest role in preventing microbial colonization?
A. Genital tract B. Stomach C. Large intestine D. Upper respiratory tract
Why does countercurrent exchange optimize gas exchange across some gills?
a. It sustains an optimal thermal environment for gas exchange. b. It optimizes perfusion to the respiratory surface. c. It sustains an optimal respiratory gas concentration gradient, allowing diffusion to occur across the entire respiratory surface. d. It optimizes delivery of the respiratory medium to the respiratory surface. e. It minimizes the area of diffusion.
Disinfectants known as (alcohols/oxidizers/aldehydes) have the chemical group -CHO, which reacts with and damages both proteins and nucleic acids.
Fill in the blank(s) with the appropriate word(s).