According to Kluyver and van Niel, which of the following are true of basic biochemical reactions?
A. They are shared by all living things.
B. There are an unlimited number of them.
C. They primarily involve the transfer of electrons and ions.
D. Basic biochemical reactions shared by all living things primarily involve transfer of electrons and hydrogen ions.
E. They primarily involve transfers of chemical groups.
Answer: D
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Which of the following is not necessary for a DNA polymerase reaction?
A. template DNA B. primer strand C. ATP D. dNTPs E. All of these components are necessary.
Food is classified as a bolus in which digestive structure?
a. large intestine b. liver c. mouth d. small intestine e. stomach
The main organelles and structures involved by distinct function with milk production and secretion in their correct sequence are
A. nucleus, smooth ER, rough ER, nuclear pore, transport vesicle, Golgi apparatus, and vesicle for secretion. B. None of the answer choices is correct. C. nucleus, nuclear pore, rough ER, smooth ER, transport vesicle, Golgi apparatus, and vesicle for secretion. D. nucleus, nuclear pore, Golgi apparatus, rough ER, transport vesicle, smooth ER, and vesicle for secretion. E. nucleus, transport vesicle, rough ER, smooth ER, Golgi aparatus, and vesicle for secretion.
An electrical current of 1 A is approximately 6 × 1018 electrical charges per second; how many monovalent ions pass through the channel when it is open?
A) 144,000 ions B) 18,000 ions C) 8,640,000 ions D) 8640 ions E) Cannot be calculated from the information given.