The following statement about the material basis of genetic information is incorrect .

Because it has been experimentally proven that DNA is genetic material, but proteins are not. Therefore, c is wrong.

According to the experiment of bacteriophage infecting bacteria:

How do you know that the substance that phages inject into bacteria is only DNA, which is mainly known through isotope labeling experiments. In 1952, Hershey (1908c) and Chase (cultured host bacteria in a medium containing 35s (indicating isotopes) and 32p, respectively, and the host bacteria were labeled with 35s and 32p respectively during the growth process. Hershey et al. then used T2 phage to infect the bacteria labeled with 35S and 32P, respectively.

Bacteriophages proliferate within bacterial cells and release many progeny phages after lysis, in which the former is labeled by 35s and the latter by 32p.

The second step of the isotope labeling experiment is to infect the unlabeled bacteria with phages labeled by 35S and 32P, respectively, and then measure the isotope labeling of the host cell When infecting bacteria with a 35S labeled phage, the assay results show that there are few isotope labels in the host cell, and most of the 35S-labeled phage proteins are attached to the outside of the host cellWhen the bacteria are infected with the 32P-labeled phage, The assay results showed that very little radioisotope 32p was present in the outer phage shell of the host cell, while most of the radioisotope 32p was inside the host cell. The above experiments show that when phages infect bacteria, it is mainly DNA that enters the bacteria, while most proteins are outside the bacteria. It can be seen that in the life history of bacteriophages, only DNA is a substance that has continuity between parents and offspring.

Therefore, DNA is the genetic material.

C false, as early as 1928, Griffiths in the United Kingdom proved through the "transformation experiment of pneumococcus" that protein BU is not genetic information;

Then, in 1944, Avery of the United States proved the genetic material of DNA stone through isotope marking;

c, DNA is the main genetic material, of course, with a whole set of genetic information, and protein is not genetic material at all, remember those two rat experiments no, go and see....

c Proteins are not genetic material.

a.Chromosomes are only distributed in the nucleus.

b.Proteins are not genetic material.

Only nucleic acids are genetic material.

c\d.A gene is a piece of DNA.

The correct answer is d

a.There is a phenomenon of selective expression of genes, and the expression of the same gene is different in different cells.

b。The basic unit should be a deoxyribonucleotide or ribonucleotide.

c。The transmission of genetic information follows the central law, but cytoplasmic inheritance does not follow the law of segregation.

d。Correctly, there is a phenomenon of cross-swapping during the tetrad period, resulting in 4 different types of gametes.

Answer: D Peaqing chain bean is a higher plant, and its genetic material is DNA; The genetic material of the virus is RNA and does not contain element S; Bacteriophages contain only DNA, not RNA, and there are only 3 nucleotides composed of A, C, and G.

1. Correct DNA replication is based on two strands of DNA as a template, while DNA transcription is based on one of the strands of DNA as a template, and the template required for both is not exactly the same.

2 Bacteria do not have a nucleus but it also has genetic material.

3 There are 64 types of codons, including 3 stop codons and 61 anticodons.

4 is a phosphodiester bond and a hydrogen bond is between the bases.

Answer D test question analysis: Genetic information refers to the order of deoxynucleotides in genes, the traits of organisms are mainly controlled by genes on chromosomes, and the genetic information in organisms is mainly stored on DNA molecules, so A, B, and C are correct, and option D is wrong.

Test Center: Suitan examines the concept of genetic information.

Comments: Genetic information refers to the order of the deoxynucleotides in the geneadenide.

Answer d nucleic acid is genetic material, and its types are deoxyribonucleic acid and ribonucleic acid, both of which can store genetic information, and nucleotides are the basic units of nucleic acids and cannot store genetic information, answer d.

d, Organisms with cellular structures all use DNA as genetic material, and their genetic information is hidden in the deoxynucleotide sequence of the gene. Viruses do not have a cellular structure, and in addition to viruses with DNA as genetic material, there are still viruses with RNA as genetic material, which is the ribonucleotide sequence. So the answer should be d, including two types of genetic material.

But if you're going to expand, there's no answer to that, because prions are made up of only proteins, and their genetic material is most likely protein, so in high school, the answer to this question is d. But the jury is not yet absolute on real life.

It should be D, genes include DNA and RNA, collectively known as nucleic acids.