In the cotransport of glucose and sodium ions:a
glucose molecules are transported down their concentration gradient.
b. sodium ions are transported down their concentration gradient.
c. the transport of glucose powers the transport of sodium.
d. ATP causes a conformational change in the carrier protein.
e. an antiport carrier protein is involved
B
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Recall that during the Paleozoic Era, atmospheric CO2 levels decreased. Why?
A. New, extensive mountain ranges formed and chemical weathering decreased. B. Earth's plate tectonics changed dramatically, and subduction increased. C. Photosynthetic, woody plants first appeared during this period. D. Volcanism decreased during this period.
During capacitation, sperm become mature
____________________ Indicate whether the statement is true or false.
Which feature has to be present in a protist in order to classify it as a photoautotroph?
A. the presence of a light-trapping pigment B. the presence of mitochondria within the cell C. the ability to synthesize inorganic compounds D. the presence of cellulose in the cell wall E. the ability to synthesize organic compounds
In batch fermentation, substrate is added continuously, and the product is siphoned off throughout the run.
Answer the following statement true (T) or false (F)