Studies of a soybean plant (Glycine max) and the bacterium Bradyrhizobium japonicum have shown
that the tip of a root hair curls toward the bacterium in response to
a. a flavonoid released by soybean roots.
b. nod gene products produced by soybean roots.
c. nod gene products produced by the bacterium.
d. nitrogen fixation by the bacterium.
e. a flavonoid produced by the bacterium.
C
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Which of the following nonpathogenic protozoa has a very large glycogen vacuole in its cyst form and measures approximately 5 to 20 µm in diameter?
a. E. coli b. I. butschlii c. E. dispar d. E. nana
During transcription, ____________________
a. a strand of mRNA is produced b. tRNA picks up amino acids c. amino acids form a protein at the ribosome d. mRNA travels to the ribosome
Which of the following statements is false regarding phagocytosis?
A) It can ingest large particles. B) It involves the projection of pseudopods. C) It is used by amoebae to ingest food. D) It is mediated by clathrin at the plasma membrane. E) It is used by macrophages and neutrophils to ingest bacteria.
Which refers to the addition of a repeat segment of a chromosome?
A) inversion B) translocation C) deletion D) duplication E) monosomy