The rungs of the DNA ladder are formed by base pairs joined by covalent bonds.
joined by covalent bonds.
joined by hydrogen bonds.
joined by ionic bonds.
NOT joined to each other
joined by hydrogen bonds.
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Deoxyribonucleotidesare included in the Sanger sequencing reaction mix to _____
a. provide a substrate forRNA polymerase b. enhance the activity of the dideoxyribonucleotides c. allow longer DNA fragments (up to 300 additional base pairs)to be sequenced d. allow the production of multiple DNA fragments of different lengths e. prevent the DNA polymerase from making too many errors
Collagen is a tough, stretch-resistant protein. You would be most likely to find collagen in which tissue type?
A. Nervous B. Connective C. Epithelial D. Muscle E. Epithelial and connective tissue
The height of pea plants from a cross between parent plants heterozygous for height, in which tall is dominant, wouldbe:a
all short. b. all tall. c. 1 tall : 3 short. d. 2 short : 2 tall. e. 3 tall : 1 short.
Which of the following statements is true?
A) Endospores are for reproduction. B) Endospores allow a cell to survive environmental changes. C) Endospores are easily stained in a Gram stain. D) A cell produces one endospore and keeps growing. E) A cell can produce many endospores.