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Both DNA and RNA can be genetic material.
发布时间:
2024-06-22 13:59:33
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相关试题
1.
In the following descriptions of DNA polymerase and RNA polymerase, the error is: ( )选项: A:RNA polymerase requires primers; B:DNA polymerase can synthesize DNA using RNA as a template; C:The extension direction of the new chain catalyzed by both enzymes is 5'-3'.; D:RNA polymerase uses NDP as raw material.
2.
Genetic information can be carried in which of the following biomolecules?选项: A:Either DNA or RNA; B:Proteins; C:DNA and not RNA; D:RNA and not DNA
3.
Which of the following statements about nucleic acids is correct:选项: A:DNA is the carrier of genetic material, responsible for the storage, transmission and release of genetic information; RNA is responsible for the expression of genetic information.; B:Nucleic acid mainly exists in the nucleus; C:Nucleic acid is divided into DNA and RNA.; D:All organisms contain both DNA and RNA nucleic acids.
4.
Which of the following statement about a gene is NOT true: 选项: A、The whole DNA sequence responsible for synthesis of a functional protein or RNA molecule. B、Polynucleotide sequence of DNA molecule that contains specific genetic information. C、The minimal functional unit of genetic material. D、The gene sequence consists of continuously arranged triplet codes.
5.
The viruses’ particles carry genetic information in ( ) molecules.选项: A:DNA B:RNA C:DNA and RNA D:DNA or RNA
6.
Which of the following descriptions about DNA and RNA polymerase are correct: 选项: A、RNA polymerase synthesize RNA chain using nucleoside diphosphate instead of nucleoside triphosphates. B、RNA polymerase can initiate transcription without a primer, and nucleotides are added to 5’ end of the growing RNA chain. C、RNA polymerase can add nucleotides in both 3’ or 5’ end of RNA chain. D、Both RNA polymerase and DNA polymerase can only add nucleotides to 3’ end of the polynucleotides.
7.
The genetic material of a bacteria is located in the molecule选项: A:RNA B:DNA C:protein D:lipid
8.
Genetic information can be carried in which of the following biomolecules?? DNA and not RNARNA and not DNAEither DNA or RNAProteins
9.
Genetic engineering manipulates gene products at the level of the选项: A:protein; B:amino acid; C:DNA; D:RNA
10.
Certain drugs can be used as antibiotics because they affect bacterial RNA polymerases but not eukaryotic RNA polymerases. RNA polymerase is a key enzyme in the process of transcription, which can be best described by which one of the following? 选项: A:The single-stranded RNA produced is identical to one of the strands of double-stranded DNA. B:The single-stranded RNA produced is identical to both of the strands ofdouble-stranded DNA. C:Eukaryotic genes are transcribed in the cytosol by three different RNA polymerases. D:RNA polymerase cannot initiate new strand synthesis and must have a primer. E:Eukaryotic genes are transcribed in the nucleus by three different DNA polymerases.
11.
In bacteria and in other organisms, ______ is the nucleic acid( 核酸) DNA that provides the genetic information.(5.0) 选项: A、it B、and C、both D、which
12.
Gene is a kind of genetic information, which controls the character and phenotype of the organism. So the essence of the gene is ().选项: A:DNA; B:RNA; C:Chromosome; D:Protein
13.
Which of the following statement(s) describe(s) a difference between RNA and DNA. Select all that apply.选项: A:RNA can exit the nucleus; B:RNA is single stranded; C:RNA is less stable than DNA; D:RNA contains the nucleobase guanine(G)
14.
Which of the following statement(s) describe(s) a difference between RNA and DNA. Select all that apply.选项: A:RNA can exit the nucleus; B:RNA is single stranded; C:RNA contains the nucleobase guanine(G); D:RNA is less stable than dna
15.
Which of the following statements about chromosomal inversions is NOT true?选项: A:The individual organisms have neither lost nor gained any genetic material.; B:An inversion can break a gene into two parts and separate each to different locations.; C:The expression of the gene may be altered due to the positional effect.; D:The inversion mutations will not likely have pronounced phenotypic effects since there is no loss of genetic material.; E:Individuals heterozygous for inversions may end up producing abnormal gametes.
16.
In 1the American bacteriologists Oswald Avery, Colin MacLeod, and Maclyn McCarty demonstrated that __________ is the genetic material through the study using pneumococci. 选项: A、protein B、RNA C、DNA D、lipid
17.
Regarding DNA-guided RNA synthesis, which of the following statements is correct: ( )选项: A: During transcription, RNA polymerase requires primers; B:Only in the presence of DNA can RNA polymerase catalyze the formation of phosphodiester bonds; C:The RNA strand is synthesized from the 5′→3′ end; D:In most cases, there is only one strand of DNA as a template; E:Synthetic RNA strands are never circular
18.
Transposition of mobile genetic elements, specialized DNA sequences that can move from one chromosomal location to another, cannot alter the activity or regulation of a gene.
19.
Regarding DNA-guided RNA synthesis, which of the following statements is correct: ( )选项: A:Only in the presence of DNA can RNA polymerase catalyze the formation of phosphodiester bonds; B:The RNA strand is synthesized from the 5′→3′ end; C:In most cases, there is only one strand of DNA as a template E. Synthetic RNA strands are never circular; D:During transcription, RNA polymerase requires primers.
20.
What is Cas9 and what does it do? 选项: A:a protein enzyme that cuts both strands of DNA at sites specified by an RNA guide; B:an RNA molecule that binds to target DNA via complementary base pairing; C:a DNA sequence that binds the Cas9 protein; D:a viral protein that disrupts bacterial membranes
21.
DNA polymerase III can only add nucleotides to an existing chain, so _____ is required. ( )选项: A:an RNA primer B:DNA polymerase I C:helicase D:a DNA primer
22.
【单选题】In the 1940s, proteins were thought to be the more likely molecules to house genetic information. What was the primary reason that DNA was not originally believed to be the genetic material? 选项: A:DNA has a high density of negative charges. B:Nucleotides were known to be a source of chemical energy for the cell. C:Both protein and nucleic acids were found to be components of chromosomes. D:DNA was found to contain only four different chemical building blocks.
23.
Experiments by Chase and Hershey in the showed that ( ).选项: A:proteins carry the genetic information; B:DNA carries the genetic information; C:proteins control DNA replication; D:polypetides are the units of inheritance; E:enzymes carry the genetic information
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