To initiate division of bacillus-shaped cells, the ________ ring forms in the center, which defines the cell division plane
a. FtsZ
b. MinE
c. MreB
d. ZipA
Answer: B
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Your colleagues are attempting to study the citric acid cycle in the lab. To do so, they have dissolved oxaloacetate in water, then stirred in sufficient quantities of every required enzyme, coenzyme, and oxidizing agent, before adding ADP and acetyl CoA. After waiting a sufficient period of time, they test the solution for ATP and are disappointed to find significantly less ATP than expected. What is the flaw in their experiment?
a. Pyruvate dehydrogenase is not water soluble and is unable to convert pyruvate into acetyl CoA outside mitochondria. b. Stirring the solution will introduce oxygen molecules, which will bond to ADP, preventing further phosphorylation. c. Without subsequent pathways to oxidize NADH and FADH2, no NAD+ and FAD are available to continue the cycle. d. ADP molecules spontaneously dephosphorylate in the presence of acetyl CoA outside of mitochondria.
______ cells are also called tissue histiocytes
Fill in the blank(s) with the appropriate word(s).
The flexible, longitudinal rod that is located between the digestive tract and the nerve cord in chordates is called the
A) spinal cord. B) notochord. C) dorsal, hollow nerve cord. D) spine.
The process of DNA replication requires that each of the parental DNA strands be used as a ___________________ to produce a duplicate of the opposing strand
(a) catalyst (b) competitor (c) template (d) copy