Question

I need 3 and 4 please.

Answer 1

$\infty \: hey \: mate \: \infty$

here is your answer...,,,

ANSWER :-

Ans of 3rd one,,
=>
•A change in the gene's DNA sequence may lead to a change in the amino acid sequence of the protein. ... These occur because the glutamic acid-to-valine amino acid change makes the hemoglobin molecules assemble into long fibers. The fibers distort disc-shaped red blood cells into crescent shapes.


ans of 4th one,
=>All biological functions depend on events that occur at the molecular level. These events are directed, modulated, or detected by complex biological machines, which are themselves large molecules or clusters of molecules. Included are proteins, nucleic acids, carbohydrates, lipids, and complexes of them. Many areas of biological science focus on the signals detected by these machines or the output from these machines. The field of structural biology is concerned with the properties and behavior of the machines themselves.



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the pic is not very well cleared..