Answer:
B.hydrogen bonding within polypeptide strands
Explanation:
Alpha helix is one of the secondary structures formed by polypeptide chains. It is formed when the backbone of a polypeptide is wound around a longitudinal axis. The side chains of the amino acids are oriented outwards. Alpha helix structure is stabilized by the formation of a maximum number of hydrogen bonds between the amino acids of the chain. The hydrogen atom linked to the electronegative nitrogen atom of a peptide bond form hydrogen bond with the electronegative carbonyl oxygen atom of the fourth amino acid.
In this way, every peptide bond except the ones present close to each end of the helix take part in hydrogen bonding and stabilize the structure.
Answer:
Life on Earth uses only two types of energy for metabolism: sunlight and redox chemistry ... One or the other has to be present, and if you're in the habitable zone of a star, you at least have enough light to support photosynthesis. So you have the right temperature, water, and sunlight. What else do you need?
Explanation:
D. Because experimentation includes a control group. also, independent and dependent variables are part of an experiment they arent a type of research
how many words is it suppoed to be?
Advantages:
- It brings a unique species
-muktiple offspring that evolve in a fast time
Disadvantages:
-It takes two people
- It takes time
Hope this helps :)
