Which hormone prevents menstruation in a pregnant woman?
a. follicle stimulating hormone
b. lutenizing hormone
c. estrogens
d. human chorionic gonadotropin
e. testosterone
ANSWER: d
You might also like to view...
The complement pathway that requires antibodies to be activated is the
A. alternate pathway. B. classical pathway. C. properdin pathway. D. inflammatory pathway.
Why was it necessary to culture E. coli for multiple generations in the 14N-rich medium to rule out the dispersive model?
a. Nitrogen is frequently lost by cells during meiosis, so multiple generations were required to ensure that residual-free 15N in the cytoplasm was replaced by 14N from the new medium. b. Multiple generations were required to ensure that the samples did not contain significant quantities of DNA from other organisms, which would confound the analysis of E. coli DNA. c. After only a single generation, it was expected that the DNA extracted from E. coli would contain equal proportions of 15N and 14N in both the semi-conservative and dispersive models. d. Multiple generations of replication in the 14N-rich medium were required to rule out the possibility that the changes to the DNA mass were not the result of inevitable statistical noise.
Which feature is found in prokaryotic cells?
A) nucleus B) endoplasmic reticulum C) Golgi apparatus D) cell wall
Which of the following processes produces the most ATP?
A. glycolysis B. Krebs cycle C. electron transport system D. anaerobic cellular respiration