Large molecules often cross the plasma membrane while inside vesicles.
Explanation:
The plasma membrane is a fluid membrane mad of phospholipids bilayer. The fatty acid chains are sandwiched in between the phosphate ends of the lipid layers. The fluidity of the membrane is due to the fact that these molecules, including the integral proteins that span the membrane are NOT covalently bound to each other hence can freely move within the membrane. Cholesterol molecules are intercalated in between the fatty acid chains and prevent these carbon chains from binding to each other tightly through hydrogen bonding hence adding to the fluidity of the membrane. The cell membrane has natural pores within it that allow small molecules such as water to pass through, passively, in and out of the cell. Larger molecules have to pass through channels created by the integral proteins while the largest molecules are taken in by endocytosis and taken out by exocytosis, which translates to vesicle transport in cell.
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Answer:
1. antibodies
2. hormones
3. kidney stones
4. transport proteins
5. protein-energy malnutrition
6. coenzymes
7. buffer
8. kwashiorkor
Explanation:
1. ANTIBODIES are proteins that aid the immune system in its fight against bacteria, viruses, and other foreign substance by binding to them and helping to inactivate or destroy them.
2. HORMONES are substances made of protein or lipid released into the bloodstream in order to direct physiological activity in the body.
3. A high-protein diet can increase the risk of KIDNEY STONES because the body will have an increased acid level.
4. TRANSPORT PROTEINS carry many substances through the blood or allow movement of substances in and out of cells.
5. PROTEIN-ENERGY MALNUTRITION is the phenomenon used to describe an inadequate intake of proteins and/or calorie content.
6. COENZYMES are molecules that play vital roles in the function of an enzyme. Coenzyme in form of vitamins are utilized by enzymes to catalyze chemical reactions.
7. Proteins can act like BUFFER (a substance with a stable pH) in order to regulate the acid-base balance in the body.
8. KWASHIORKOR is a malnutrition deficiency that result from the insufficiency of dietary protein, resulting in swelling in the feet, legs, and stomach among other symptoms.
Answer:
Examples of Prokaryotic cells are: Bacteria and blue-green algae;
Examples of Eukaryotic cells include: Yeasts, Fungi, Animal cells including Protozoa and Plant cells including Algae.
Source:https://www.quora.com/What-are-some-examples-of-prokaryotic-and-eukaryotic-cells
Hope this helps!
Answer:
When one organism eats another, the matter, or carbon, nitrogen, and other essential elements, are transferred from one to the other. These elements move from the producers, to the consumers, and eventually to the decomposers, cycling the matter through the ecosystem.
Explanation:
The answer is; a) they are naturally occurring.
