Answer: 4
Explanation: The smallest fragments travel the furthest distance through the gel plate because are able to move quickly through the gel.
Channel proteins help large molecules pass through the cell membrane.
Answer;
Muscle cells in oxygen deprivation convert pyruvate to lactate, and in this step gain NAD+.
Explanation;
When oxygen is insufficient or not present the muscle cells for further oxidation of pyruvate and NADH produced in glycolysis, NAD+ is regenerated from NADH by reduction of pyruvate to lactate.
Pyruvate is converted to lactate by the enzyme lactate dehydrogenase.
B. Golgi Apparatus.
All eukaryotes have a Golgi apparatus though not all have the other organelles named above. They all have it because of it's indispensable function, transportation of lipids and the preparation for secretion an secretion of proteins.
The other part mentioned have important functions but that varies from cell to cell according to their functions.
Hope it helped,
BioTeacher101
