Which of the following statements about the structure or composition of DNA is FALSE?
A. DNA is a double helix.
B. Complementary base-pairing occurs between pyrimidine and purine bases.
C. The amount of thymine closely approximates that of guanine within a particular organism.
D. Each nucleotide within a DNA strand is separated by about 0.34 nm.
E. Adenine pairs with thymine and guanine with cytosine.
C. The amount of thymine closely approximates that of guanine within a particular organism.
You might also like to view...
Which of the following biochemical reactions identifies an organism associated with blood, bone, and joint infections in young children?
a. Positive catalase, positive nitrate reduc-tion, and positive indole b. Negative catalase, positive nitrate reduc-tion, and positive indole c. Negative catalase, negative nitrate reduc-tion, and positive indole d. Negative catalase, negative nitrate reduc-tion, and negative indole
Which of the following vectors must be transformed to get into bacterial cells?
A. yeast. B. fungus. C. plasmid. D. virus. E. bacteriophage.
A sizable population was analyzed for SNPs in a certain DNA region. Four possible variants were found, with the following frequencies: SNP 1: GGTCTAGGA; frequency = 0.91 SNP 2: GGTGTAGGA; frequency = 0.03 SNP 3: GGTATAGGA; frequency = 0
03 SNP 4: GGTTTAGGA; frequency = 0.03 If the population is in Hardy-Weinberg equilibrium, what is the total frequency of heterozygotes at this SNP locus? A) 0.828 B) 0.009 C) 0.170 D) 0.055 E) 0.0018
Microfilaments are made of ________
A) tubulin B) actin C) intermediate proteins D) phospholipids