In order to visualize LDL entry into the cell, researchers tagged the LDL with which heavy metal?
a. iron
b. mercury
c. lead
d. manganese
e. zinc
ANSWER: a
Biology & Microbiology
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Carbon-12 and carbon-13 are different in the number of their _____.
A. neutrons
B. electrons
C. protons
D. protons and electrons
Biology & Microbiology
Delayed type hypersensitivity primarily involves
A. erythrocytes. B. B cells. C. T cells. D. mast cells.
Biology & Microbiology
Which genetic event is a source of new alleles within a population?
a. Mutation b. Crossing over during Meiosis I c. Independent assortment during Meiosis I d. Change in chromosomal number e. Fertilization
Biology & Microbiology
The snail-shaped _______________ transduces sound into nerve impulses.
A. vestibule B. malleus C. utricle D. cochlea E. incus
Biology & Microbiology