Answer:
<em> e) Ala</em>
Explanation:
Alpha helix is a secondary structure of proteins, it is made of 3.6 aminoacids residues per turn, this structure is possible thanks to local hydrogen bonding between C=O and N-h groups. The result is a cylindrical structure with a hydrogen-bonded backbone and the outside studded with side chains.
Glycin has an -H in its side chain, this makes it a too flexible molecule, therefore it's unusual to find them in alpha-helical structures because their presence could cause the helix to deform. Large R-groups can also affect this stability, phenylalanine has a bulky aromatic side group, this discards it as a stabilizer. Serine has a hydrogen bond donor or acceptor as a side chain, due to the proximity to the main chain it competes with the main chain to form NH and CO bonds. Alanine is the most common amino acid in alpha-helix structures because it has a short and no charged R group (unlike arginine that even when it's short it has a charged R-group), this makes it flexible enough to keep the structure stabilized.
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It's empty or fairly large, making the sounds from your hands bounce of the walls and therefore having it echo
Living organisms are not created spontaneously.
Explanation:
The cell is the basic and fundamental unit of life. Cells are the basis of the organization of life and on it, complexity is built.
The cell theory was formulated around the 17th century and there are some of its postulates:
- The functioning and fundamental unit of life is the cell
- All organisms are made up of one or more cells.
- Cells are formed from pre-existing cells and are not created spontaneously.
Learn more:
Cell theory brainly.com/question/3256177
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<span>B.The results that support the claim are replicable by other scientists who follow the same procedures.
</span><span>Replicable is one strong characteristic of a study that can intensify the reliability and validity of the field, however using the same procedures as the experiementation done beforehand is critical to observe the same possible outcome.<span>
</span></span><span>They utilize and make use of the scientific method in order to have clear basis and evidence for their investigations. Research method is always used to answer every scientific inquiry and in gaining evidential data or knowledge. The scientific method has the following process or at least undergoes the process of
1. Observation</span>
2. Hypothesis
3. Experimentation
4. Interpretation of data
5. Evaluating the data
6. Passing and recording the data
<span>These steps are crucial and the empirical data that these scientists obtain are very important to keep that is why research paper, thesis and dissertations exists.<span> </span></span>
