Answer:
Cell plate. When the cell plate merges with the plasma membrane, the phragmoplast vanishes. This phenomenon signifies not only the division of the two daughter cells but also initiates several biochemical alterations that convert the callose-rich, flexible cell plate into a rigid primary cell wall rich in cellulose.
Explanation:
Each subunit of a hemoglobin protein contains a heme group, and since a hemoglobin protein comprises four subunits—two α and two β—we can calculate the total number of heme groups by multiplying four (the number of heme groups per hemoglobin) by three (the total hemoglobin molecules considered). Hence, 4 × 3 = 12.
This means that three hemoglobin protein molecules possess twelve heme groups.
Answer:
C) Na+ ions leaving the cell
Explanation:
- The expulsion of Na+ ions from the cell necessitates the hydrolysis of ATP, a process known as active transport.
- Active transport entails moving substances against their concentration gradient by utilizing energy derived from the hydrolysis of ATP.
- This active transport mechanism utilizes ATP energy to transport ions either into or out of the cell.
