A. All four are protist membranes
b. Two are from the engulfed photosynthetic bacterium; one is a protist membrane; the other is from the food vacuole produced by the protist originally containing the bacterium.
c. Four membranes evolved from the protist's cell membrane.
d. All four are bacterial membranes.
e. One is from the bacterium; one is from the protist; one is from the bacterial nuclear membrane; one is from a food vacuole.
Answer:
<u><em> oxygen in the solution will naturally diffuse into the cell.</em></u>
Explanation:
Cells require oxygen for cellular respiration to occur. When a cell is places in a solution having oxygen dissolved in it, The concentration of the oxygen outside the cell will be more as compared to the concentration of oxygen inside the cell. As a result, the cell will take up oxygen by the process of diffusion. Diffusion is the movement of particles from a higher concentration to a lower concentration along a concentration gradient.
1. The carrier proteins via which sugar comes into pancreatic beta cells have HIGHER Km when compared to the carriers via which sugar comes into muscle cells at fasting blood sugar levels.
Explanation: A high Km amount shows a low affinity for the substrate. The carrier protein (GLUT4), which is basically observed in muscle cells, do possess a stronger affinity for glucose (low km 1.8-4.8mM) thereby making sure that maximum glucose is efficiently transported in tissues in situations where glucose concentration drops. While the carrier proteins located in beta cells (GLUT2) do show a high km ~20mM, as a higher km promotes for glucose sensing.
2. In order for muscle cells to raise sugar import INSULIN MUST BE PRESENT.
3. Oh, and glucokinase has a HIGH Km when compared to hexokinase.
Explanation: Glucokinase do possesses a minimal affinity (higher Km) for glucose as it will only function in situations of increased glucose concentration in serum.
4. Proton pumps are required for the release of transferrin from the transferrin receptor and iron form transferrin.
Explanation: H+ ATPases reduces the pH of the vesicle and results in transferrin to produce iron.
5. Iron Reductases Convert the iron to the active form in which it may be exported.
6. This happens in the Lysosome.
Explanation: Ferric iron is transformed into ferrous iron (which is the active type) through the activities of ferric reductase.
Answer:
DNA is not neccessarly produced, but is copied from when a parent cell divides into two daughter cells
Explanation:
If you mean where the DNA is stored, it is stored in the nucleus