Your answer is "tiny structures in the cell that carry out the activities."
Answer:
The R organic group.
Explanation:
Amino acids are a complex of organic compounds that combine to build proteins. The general structure of an amino acid is set by a carboxyl group (―COOH), a basic amino group (―NH2), and an organic R group, unique in every amino acid.
The amino acids differ from each other in the <u>particular chemical structure </u>and organization of hydrogen, nitrogen, carbon and oxygen atoms present in the organic R group.
Answer:
According to the base-pairing rule A form base pair with T with two hydrogen bond and G pairs with C with 3 hydrogen bond in DNA. But in RNA T is replaced by U that means A pairs with U in mRNA.
So according to this the nucleotide sequence of the mRNA molecule transcribed from the GTA codon of DNA will be CAU. tRNA are the molecules that pairs to the triplet codon present on mRNA through its anticodon loop which have nucleotide sequence just opposite to triplet codon it binds with.
Each tRNA has attached amino acid according to the anticodon sequence it has. So the anticodon sequence on tRNA will be GUA against the CAU codon sequence of nucleotide on mRNA and this tRNA must be attached with histidine amino acid.
Answer: B
Explanation:
Synthesis of an inducible enzyme requires the substrate bound to repressor.
In the synthesis of a specific inducible enzymes, a substrate on which the enzyme acts must bind to the repressor that prevents the synthesis of the inducible enzyme. Example of an inducible enzyme is β-galactosidase in Escherichia coli that degrades lactose and galactose.
The synthesis of β-galactosidase is regulated by a repressor protein, that binds to the region of deoxyribonucleic acid (DNA) that codes for the synthesis of β-galactosidase. If lactose or galactose (substrate) is present, it acts as an inducer which induce the repressor protein from binding to DNA. Hence the enzyme is synthesized
