Answer:
A. pH
Explanation:
Denaturation of proteins is a protein whereby the protein molecule loses its primary structure and ultimately its physical functioning as a result of factors including pH, temperature or concentration of chemicals. Based on this definition, it is visible that denaturation of proteins can be caused by these three factors: pH, chemical and temperature.
However, in this case of PEPSIN enzyme, which is a proteinous molecule produced in the stomach of humans and functions in breaking down proteins, its denaturation occurs as it moves along the digestive tract to the intestines. This is as a result of the changes in pH in the digestive tract.
The pH of the stomach where pepsin is produced is acidic i.e. <3.0. However, as one moves towards the intestine, the pH increases, which is unfavorable or considered harsh for the pepsin enzyme. Hence, it gets denatured.
Pollution and digging oil wells. Pollution contaminates the Earth and digging oil wells can cause earthquakes.
Answer:College Board strongly encourages educators to make equitable access a guiding principle for their AP programs by giving all willing and academically ... The course requires that students identify and analyze natural and ... to humans and the ecosystem at large. ... and it has changed due to global climate change.
Explanation: But for the answer i would choose A,B And mabye D?
Answer:
D) The hydrogen and oxygen atoms of water are split in the light reactions, and oxygen is released. In the Calvin cycle, hydrogen atoms join with the carbon and oxygen atoms of carbon dioxide to form carbohydrates.
Explanation:
Photosynthesis is the process by which plants produce carbohydrates (sugars) from carbon dioxide in the atmosphere and water using the energy of sunlight. The process of photosynthesis occurs in two stages: (i) the light-dependent stage and (ii) the light-independent stage.
Light reactions: In this stage, the hydrogen and oxygen atoms of water are split in the light reactions, and oxygen is released. Also, the energy storage molecule ATP and the reduced electron carrier NADPH are produced.
Light-independent reaction or Calvin cycle: in this stage, carbon atoms from CO₂ are incorporated into ribulose-5-phosphate and used to produce glyceraldehyde-3-phosphate, a three-carbon sugar using the energy of ATP and NADPH from the light reactions. Essentially, hydrogen atoms join with the carbon and oxygen atoms of carbon dioxide to form carbohydrates.
Answer:
Plaquetas (o trombocitos)
Explanation:
Entre los componentes de la sangre, ademas del plasma, encontramos: globulos rojos (también llamados eritrocitos), glóbulos blancos (o leucocitos) y plaquetas (o trombocitos). De estos componentes, los que intervienen en la coagulación de la sangre son las plaquetas. Dado que en la trombosis se forman coágulos de sangre, los componentes relacionados son las plaquetas. De hecho, un trombo o coágulo es un agregado formado por plaquetas y proteínas denominadas fibrinas.
