Where would you find a cell adhesion molecule?
A. in an axoneme
B. at a cellular junction
C. near the centrosome
D. in the microvilli
B
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How are B-cell receptors different from T-cell receptors?
a. B-cell receptors bind antigen, while T-cell receptors do not. b. B-cell receptors have a more complex structure. c. B-cell receptors have a more simple structure. d. B-cell receptors are bound to the cell membrane, while T-cell receptors are bound to the nuclear membrane. e. B-cell receptors stimulate the production of a clone of cells.
Which method of proof is generally more effective at identifying hidden or implicit assumptions of an argument?
A. Proof by induction B. Proof by transposition C. Direct proof D. None of the answers is correct.
What does a scientist do after making observations?
A) Formulate a hypothesis B) Conduct an experiment C) Think of questions D) Draw a conclusion
Which of the following statements about how fruit flies can develop an eye in the middle of a leg is true?
(a) When the Ey gene is expressed in adult leg cells, these cells de-differentiate and become eye cells. (b) The Ey gene encodes a transcription regulator that is the only transcription regulator used to produce a fruit-fly eye. (c) When the Ey gene is introduced into cells that would normally give rise to a leg, the transcription regulators used to control its expression in the leg are different from those that are normally used to control Ey expression in the eye. (d) All the eye cells found in the adult leg are a single cell type and have identical characteristics.