Nutrients cross the membrane wall with the help of protein channels.
14: Operons allow prokaryotes to replicate DNA at the appropriate time.
Operons are specific regions of genes that are linked to a singular process. They ensure that the expression of these genes does not go unchecked and only occurs when necessary. Two key examples of this in humans are the lac operon and trp operon.
15. The central dogma of molecular biology is:
DNA to RNA to Proteins
Protein Synthesis occurs in 3 steps.
First our DNA is translated into RNA. Next the RNA is sequenced into Amino Acids by reading the corresponding 3-Base Codons. These Amino Acid sequences form various protein structures.
Option C. Organisms were probably more complex during past eras.
Mutation of proto-oncogene leads to cancer, but tumor suppressor gene prevents it.
Cancer will be spread out because of tumor suppressor gene (P53) mutation.
the place of P53 is 17th gene(to be specific 17p13.1).
