How many replication forks are there at a replication origin?

A. 1
B. 2
C. 3
D. 4
E. 5


B. 2

Biology & Microbiology

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Differences between mitochondrial and E. coli electron transport chains include the following:

A. The E. coli chain contains a different array of cytochromes. B. Higher P/O values are observed in E. coli. C. The electron transport chain does not involve membranes in E. coli. D. The fundamental principles on which they operate are different.

Biology & Microbiology

Match each ventricle of the human brain with the region of the brain within which it is located.

Biology & Microbiology

A blocked coronary sinus would block blood flow:a

into the superior vena cava. b. into the inferior vena cava. c. into the pulmonary arteries. d. returning from the pulmonary arteries. e. returning from the coronary circulation

Biology & Microbiology

In sea urchin development, the archenteron becomes the:

A) endoderm. B) lungs. C) ectoderm. D) digestive tube.

Biology & Microbiology