Who proposed that in any DNA molecule, A =T and G = C?  

A.  Hershey and Chase
B.  Chargaff
C.  Franklin
D.  Watson and Crick


B.  Chargaff

Biology & Microbiology

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The tips of the branches on a phylogenetic tree represent:

A. present-day groups. B. common ancestors. C. analogies. D. sister groups. E. homologies.

Biology & Microbiology

Which sequence reflects the locations that a secretory protein will visit on its way from its production to its secretion outside the cell?

A) rough ER, secretory vesicle, Golgi complex, ER vesicle B) rough ER, Golgi complex, smooth ER, ER vesicle C) nucleus, Golgi complex, rough or smooth ER, secretory vesicle D) smooth ER, rough ER, Golgi complex, secretory vesicle E) rough ER, ER vesicle, Golgi complex, secretory vesicle

Biology & Microbiology

Male redback spiders benefit when they are eaten by their mates because

A. they ultimately have higher reproductive success. B. they are only partially eaten and can regrow lost parts. C. they would die soon after copulation anyway. D. they don't have to fight other males. E. None of the answer choices is correct.

Biology & Microbiology

Which of the following is part of the apoplast?

A. Cell wall B. Plasma membrane C. Plasmodesma D. Cytoplasm

Biology & Microbiology