Which of the following does not occur during the erythrocytic stage of the malarial life cycle?
A. The parasite reproduces asexually via schizogony, producing merozoites.
B. The parasites are protected from the host's immune response.
C. The parasite reproduces sexually producing microgametocytes and macrogametocytes.
D. Sporozoites are produced within erythrocytes and are released by the infected red blood cells.
Answer: D
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Suppose you wanted to investigate ideas on how polymerization of prebiotic organic molecules may have occurred on the early Earth. Which of the following scenarios might best be utilized for this?
A. Mix some RNA nucleotides in water and heat them to boiling temperatures. B. Mix some amino acids (protein building blocks) in water and add a strong acid or a strong base. C. Mix some RNA nucleotides in water and repeatedly wet and dry them on clay. D. Mix some amino acids (protein building blocks) in water and add a bacterium harmless to humans. E. Mix some amino acids in salt water and cool down to 0? C.
. A second messenger involved in regulating metabolism is ____
a. ATP b. ADP c. mRNA d. cAMP e. NADH
Cytoplasmic division in animal cells involves
all EXCEPT a. formation of a cell plate. b. a contractile ring mechanism. c. a deepening cleavage furrow. d. a ring of actin filaments under the plasma membrane at the equator. e. ATP.
Adult stem cells are always unipotent.
Answer the following statement true (T) or false (F)