Proteins have a greater variety of three-dimensional forms than does DNA.
Proteins have two different levels of structural organization; DNA has four.
Proteins are made of 20 amino acids and DNA is made of four nucleotides.
Only A and C are correct.
A, B, and C are correct.
Mutant mice were resistant to bacterial infections.
Mixing a heat-killed pathogenic strain of bacteria with a living nonpathogenic strain can convert some of the living cells into the pathogenic form.
Mixing a heat-killed nonpathogenic strain of bacteria with a living pathogenic strain makes the pathogenic strain nonpathogenic.
Infecting mice with nonpathogenic strains of bacteria makes them resistant to pathogenic strains.
Mice infected with a pathogenic strain of bacteria can spread the infection to other mice.
The creation of a strand of DNA from an RNA molecule
The creation of a strand of RNA from a DNA molecule
The infection of cells by a phage DNA molecule
The type of semiconservative replication shown by DNA
Assimilation of external DNA into a cell
Tobacco mosaic virus
The related DNA virus
A hybrid: tobacco mosaic virus RNA and protein from the DNA virus
A hybrid: tobacco mosaic virus protein and nucleic acid from the DNA virus
A virus with a double helix made up of one strand of DNA complementary to a strand of RNA surrounded by viral protein
V, IV, II, I, III
II, I, III, V, IV
I, II, III, V, IV
I, II, V, IV, III
II, III, IV, V, I
DNA passed from the heat-killed strain to the living strain.
Protein passed from the heat-killed strain to the living strain.
The phosphorescence in the living strain is especially bright.
Descendants of the living cells are also phosphorescent.
Both DNA and protein passed from the heat-killed strain to the living strain.
DNA does not contain sulfur, whereas protein does.
DNA contains phosphorus, but protein does not.
DNA contains nitrogen, whereas protein does not.
A and B only
A, B, and C
There is no radioactive isotope of nitrogen.
Radioactive nitrogen has a half-life of 100,000 years, and the material would be too dangerous for too long.
Meselson and Stahl already did this experiment.
Although there are more nitrogens in a nucleotide, labeled phosphates actually have 16 extra neutrons; therefore, they are more radioactive.
Amino acids (and thus proteins) also have nitrogen atoms; thus, the radioactivity would not distinguish between DNA and proteins.
The viral DNA will be radioactive.
The viral proteins will be radioactive.
The bacterial DNA will be radioactive.
Both A and B
Both A and C
It cannot be determined from the information provided.
The relative proportion of each of the four bases differs from species to species.
The human genome is more complex than that of other species.
The amount of A is always equivalent to T, and C to G.
Both A and C
Both B and C
Diameter of the helix.
Helical shape of DNA.
Sequence of nucleotides.
Spacing of the nitrogenous bases along the helix.
Number of strands in a helix.
Deoxyribose sugars; ribose sugars
Ribose sugars; deoxyribose sugars
Nucleotides; nucleoside triphosphates
The two strands of the DNA form a double helix.
The distance between the strands of the helix is uniform.
The framework of the helix consists of sugar-phosphate units of the nucleotides.
The two strands of the helix are held together by covalent bonds.
The purines form hydrogen bonds with pyrimidines.
Sequence of bases.
Complementary pairing of bases.
Side groups of nitrogenous bases.
Different five-carbon sugars.
A = C
A = G and C = T
A + C = G + T
G + A = T + C
Both C and D
The prokaryotic chromosome is circular, whereas eukaryotic chromosomes are linear.
Prokaryotic chromosomes have a single origin of replication, whereas eukaryotic chromosomes have many.
The rate of elongation during DNA replication is higher in prokaryotes than in eukaryotes
Prokaryotes produce Okazaki fragments during DNA replication, but eukaryotes do not.
Eukaryotes have telomeres, and prokaryotes do not.
The twisting nature of DNA creates nonparallel strands.
The 5' to 3' direction of one strand runs counter to the 5' to 3' direction of the other strand.
Base pairings create unequal spacing between the two DNA strands.
One strand is positively charged and the other is negatively charged.
One strand contains only purines and the other contains only pyrimidines.
One of the daughter cells, but not the other, would have radioactive DNA.
Neither of the two daughter cells would be radioactive.
All four bases of the DNA would be radioactive.
Radioactive thymine would pair with nonradioactive guanine.
DNA in both daughter cells would be radioactive.
The particular DNA polymerase catalyzing the reaction
The relative amounts of the four nucleoside triphosphates in the cell
The nucleotide sequence of the template strand
The primase used in the reaction
Both A and D