Mac 10: R Flashcards
20% of the bases in a certain sample of RNA were found to be cytosine. The percentage of adenine is __________.
- 40%
- Cannot be determined from given data
- 20%
- 30%
-Cannot be determined from given data
The elements that always comprise nucleotides are
- Nitrogen
- Potassium
- Sulfur
- Phosphorus
- Oxygen
- Sodium
- Hydrogen
- Carbon
- Carbon
- Hydrogen
- Oxygen
- Nitrogen
- Phosphorus
True or False
Purines are aromatic organic compounds that can absorb ultraviolet light while pyrimidines are aliphatic organic compounds.
-False
The DNA double helix is stabilized by
- More than one correct answer
- H bonds between sugar and phosphates
- H bonds between sugar and phosphates
- Stacking interactions between base pairs
-More than one correct answer
Fill in the blanks
Pyrimidines in RNA are _____ and _____ while the purines are _____ and _____.
- Cytosine
- Uracil
- Adenine
- Guanine
The correct structural characteristics of a nucleic acid is
- The nucleic acid base is covalently bonded to the phosphate
- The covalent bond between the nucleic acid base and the sugar is the N-C glycosidic linkage
- The covalent bond between the nucleic acid base and the sugar is the O-C glycosidic linkage
- None of the above
-The covalent bond between the nucleic acid base and the sugar is the N-C glycosidic linkage
True or False
Purines have single rings and pyrimidines have fused rings.
-False (Purines have double rings)
Fill in the blanks
In a DNA molecule, the number of base pairs per turn of the helix is _____. DNA is complexed with _____ in the chromosome.
- 10
- Histones
True or False
The building blocks of nucleic acids are the nucleic acid bases.
-False (Nucleotides)
Fill in the blanks
In a sample of DNA, 30% were found to be adenine. The percentage of thymine is _____.
-20%
