Gene directed protein synthesis. Changes in the type and sequence of amino acids in a protein

Changes in species and quantity indicate changes in DNA, and DNA synthesis occurs only in the nucleus, chloroplasts, and mitochondria in cells. Therefore, the choice c matrilineal inheritance means that if the mother is sick, then its offspring are all sick, the essence is cytoplasmic inheritance, and the so-called DNA in the cytoplasm is in the chloroplast or mitochondria. A and B are secreted proteins, which are modified by the Golgi apparatus, but only change their folding order and add a "primer".

Maternal inheritance, that is, cytoplasmic inheritance. The genetic material of eukaryotes is mainly distributed in the nucleus, and there is also a small amount of genetic material in the mitochondria and chloroplasts of the cytoplasm, and mitochondria and chloroplasts have independent transcription and translation functions, but the growth and proliferation of mitochondria and chloroplasts are controlled by the nuclear genome and their own genome two sets of genetic information systems, so they are called semi-autonomous organelles. **c is correct.

The Golgi apparatus is the site of the final processing and packaging of cell secretion.

According to the title, the requirement is gene-directed protein synthesis. There is no gene involvement in the Golgi apparatus and ribosomes. In C, chloroplasts and mitochondria contain a small amount of DNA genes, and they are inherited in the maternal line.

In animals and plants, only chloroplasts and mitochondria contain genes that are inherited in the maternal line.

DNA is only found in the nucleus and in the mitochondria, chloroplasts.

Each amino acid has a corresponding codon.

Write out the nucleotide sequence of messenger RNA according to the principle of base complementary pairing.

Then, one of the template strands of DNA was written according to the principle of base complementary pairing.

Then we can use the principle of base complementary pairing to write another strand of DNA.

It can be said that it is almost the same!

Hello, 3 nucleotide codons correspond to encoding an amino acid, so 20 amino acid residues make up the gene containing the amino acid sequence of the protein, which contains 60 nucleotides.

The diagram below illustrates the process of gene-directed protein synthesis. Please analyze and:

1) A process needs to be ribonucleotides.

As raw materials, in helicase and RNA polymerase.

is catalyzed to complete.

2) In the figure, transfer RNA is described

Its role is to transport raw amino acids during translation.

3) The direction in which the ribosome moves on is to the right.

Left, right). If a base is inserted into , it may result in the number of amino acids in the peptide chain and the order in which the amino acids are arranged.

Change.

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I agree with the other answers on the first floor. Correcting only a little transcription requires only RNA polymerase and no helicase is required. Because RNA polymerase is a complex enzyme, it has the function of unwinding.

The base number of answer B in this question essentially represents the nucleotide sequence that can code for protein, and the quantitative relationship between DNA and mRNA proteins in biology is 6:3:1, so the maximum number of amino acids is 1200 6=200.

Summary. The diagram below illustrates the process of gene-directed protein synthesis. Please analyze and:

Diagram eye. Figure also.

The process of protein synthesis of amino acids is guided by ** release DNA.

AnswerA gene mutation is a change in the molecular structure of a gene, including the addition, deletion, or alteration of base pairs. Since most amino acids have more than two codons, a change in one base in a gene does not necessarily cause a change in the amino acids in the protein molecule. If a base pair is added to the gene, the sequence of the base pair after the mutation site is not the same as the original, so the amino acid sequence in the synthesized protein is also different from the original.