What is the underlying molecular cause of Crohn’s disease?
a. B cells are mutated and do not release antibodies.
b. Receptor proteins are mutated and cause an abnormal immune response.
c. Helper T cells are inactivated.
d. Mucus is not released from epithelial tissues.
e. Antigen-presenting cells are absent.
b
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In a catabolic reaction, electrons from food are...
A. added by reduction and stored in ATP. B. added by reduction and stored in NADH. C. removed by oxidation and stored in NADH. D. added by oxidation and stored in ATP. E. removed by reduction and stored in NADH.
__________ is a set of methods that allow us to
reconstruct phylogeny. Fill in the blank(s) with the appropriate word(s).
You are studying cell cycle progression in yeast cells. If you could prevent cdc2 from associating with the mitotic cyclin, the cells would:
A. arrest in G2. B. arrest in S. C. arrest in prometaphase. D. arrest in metaphase. E. arrest in G1.
You want to test whether reciprocity explains the evolution of mobbing behavior in birds
You have two sources of birds to choose from: (A) a group of birds from your lab that all originated from the same mating pair, and (B) a group of presumably unrelated birds from the wild. Briefly justify your answer. What will be an ideal response?