Peristalsis is ________.
a) the process by which the chest cavity is enlarged to allow inhalation
b) the distinguishing characteristic between chordates and vertebrates
c) a series of muscular contractions that moves food through the digestive tract
d) an infection of the bronchioles, resulting in reduced air flow to the lungs.
Ans: c) a series of muscular contractions that moves food through the digestive tract
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The energy of electron transport serves to move (translocate) protons to the outer mitochondrial compartment. How does this help the mitochondrion produce ATP?
A) The hydrogen ions (protons) are transferred to oxygen in an energy-releasing reaction. B) The translocation of protons sets up the electrochemical gradient that drives ATP synthesis in the mitochondria. C) The protons pick up electrons from the electron transport chain on their way through the inner mitochondrial membrane. D) The protons receive electrons from the NAD+ and FAD that are accepted by electrons in glycolysis and the citric acid cycle.
Discuss how only one blocked metabolic pathway, such as the one leading from phenylalanine, has the potential to cause many different disorders
What will be an ideal response?
What is the result of diploid megasporocyte meiosis?
a. four eggs and two female gametophytes. b. eight diploid microspores c. three small and one large haploid megaspores d. three seeds and one haploid zygote.
The restriction enzyme SmaI cuts DNA at the 6-base recognition sequence 5'-CCCGGG-3'. Calculate the frequency of occurrence of this sequence. (Assume a 50% GC content.)
What will be an ideal response?