Answer:
Explanation:
The components of the cell membrane consists of lipids that includes the cholesterol and phospholipids other components includes the carbohydrates, and proteins. The phospholipid forms the basic structure of the cell membrane. The cholesterol molecules are scattered in the lipid bilayer, these help the membrane in the fluid consistent state.
The main function of the plasma or cell membrane is the protection of the cell from it's surrounding.
Absence of oxygen means anaerobic respiration ; which has 2 different pathways.
First Pathway ; Alcoholic fermentation which takes place in yeast.
Pyruvate is decarboxylated into ethanal releasing co2 as waste product.
Ethanal is toxic , so its reduced by help of NADH to ethanol in presence of alcohol dehydrogenase enzyme , and Free NAD is released to continue glycolysis.
2) The second pathway is Lactic fermentation which takes place in mammalian muscles.
Pyruvate accepts hydrogen and is converted to lactate by the help of enzyme lactate dehydrogenase , again free NAD is released to continue glycolysis.
Hope I made it clear enough :)
both are smart and can use there hands for grabing things and some can use sign language to humans
