Answer:
Observation is essential in science. Scientists use observation to collect and record data, which enables them to construct and then test hypotheses and theories. Scientists observe in many ways – with their own senses or with tools such as microscopes, scanners or transmitters to extend their vision or hearing
The basic idea of a hypothesis is that there is no pre-determined outcome. ... A key function in this step in the scientific method is deriving predictions from the hypotheses about the results of future experiments, and then performing those experiments to see whether they support the predictions
The most appropriate answer is d. they hire lobbyists. Lobbyists are individuals who attempt to influence government policies or legislature. Businesses pay these individuals to advocate on their behalf on policies and legislature. Lobbyists may be members of specific interest groups such as environmental protection or child care and protection.
Answer:
C. amino acids.
Explanation:
Amino acids are organic molecules that combine to form proteins whereas a nucleotide is an organic compound that combines a sugar molecule and a phosphate . Phospolipids are fatty acids that also contain a phosphate molecule and lastly carbohydrates which are also known as saccharides are made up of Carbon , Hydrogen and Oxygen atoms .
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.
