When substrate-level phosphorylation occurs, it means that:
A. NAD+ is converted into NADH.
B. ADP is converted into ATP by the addition of a phosphate group.
C. ATP is converted into ADP plus a phosphate group.
D. NADH is converted into NAD+ plus a proton.
Answer: B
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The most likely reason a metastatic tumor cell might lose its connection to the basal lamina would be:
A. a change in the composition of the basal lamina. B. the loss of integrin proteins from the cell's surface. C. a change in the type of integrin proteins present on the cell's surface. D. Answers b and c are both correct.
Answer the following statements true (T) or false (F)
1) Crossing-over occurs in meiosis I and meiosis II. 2) Chromosome duplication occurs between meiosis I and meiosis II. 3) In animal cells, cell division is accomplished by the formation of a cleavage furrow. 4) Daughter cells produced in meiosis are identical. 5) Chromosome duplication occurs prior to both mitosis and meiosis.
Litterbags can be used to estimate the rate of decomposition
Indicate whether the statement is true or false
A asset tube contains red blood cells and a salt solution. When the tube is held up to a page, you cannot see the print. with reference to a concentration of 0.9% sodium chloride (NaCL), how concentrated is the salt solution?
What will be an ideal response?