Answer:
Secondary level of protein structure
Explanation:
The proteins are formed of the monomer units called amino acids which bond with each other via peptide bond and form a linear peptide structure called the primary level structure of the protein.
The proteins to perform several functions in a cell undergoes structural conformation and attain the helical form called alpha helix due to the involvement of alpha carbon in bond formation and a pleated sheet called beta-pleated sheet due to the involvement of beta carbon. These structures are known as a secondary level of protein structure.
Thus, a Secondary level of protein structure is the correct answer.
A solution to be isotonic refers to b) The concentration of solute in the environment and the concentration inside the cell are at equilibrium.
- Isotonic solution is the solution that have equal concentration of solute on both sides of the solution separated by a membrane.
- If a cell is kept in an isotonic solution that means the concentration of the solute inside the cell is the same as that of the outside then the movement of solvent does not occur between the cell and the external environment.
- The osmotic pressure inside the cell and outside the cell across the semipermeable membrane of the cell becomes the same due to equal concentration of the solute on each side.
0.9% normal saline is an example of isotonic solution.
Learn more about isotonic solution:
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Answer:
Answer is lysogenic cycle.
Explanation:
Lysogenic cycle is a situation where a virus replicate its DNA using a host cell. And it involves the following stages, attachment, penetration, uncoating, biosynthesis, maturation and release.
This cycle is one of the two viral reproductive cycles, the other is lytic cycle.
The answer you are looking for is A) Fish
Fishes are examples of Vertebrates. They are cold-blooded; obtain dissolved oxygen in water through gills; most of them lay eggs; have scales; have fins; live in water.
