Molbio Lec: Beginning, Nucleic & genome quiz

The sugar component in RNA is______, while ______in DNA.

• Deoxyribose, ribose

• Ribose, deoxyribose

• Ribose, bases

• Phosphate, ribose

Nucleoside is a pyrimidine or purine base

• Ionically bonded to a sugar

• Covalently bonded to a sugar

• Both covalently and hydrogen bonded to a sugar

• Hydrogen bonded to a sugar

The glycosidic bonds in DNA and RNA

• Free to rotate over about 180 degrees

• Connect the sugar to the base

• Stabilize Watson-crick H-bonds

• Can be hydrolyzed by -OH ion

A nucleotide consists of:

• Sugar and phosphate

• Paired bases

• all of these

• Sugar, base and a phosphate

Which of the following is found on RNA but not DNA?

• Phosphate

• Uracil

•  

  Adenine

• Deoxyribose

The monomeric unit of nucleic acid is called_____.

•  

  Pyrimidines

• Purines

•  

  Nucleosides

•  

  Nucleotides

Which of the following pyrimidine base is found in RNA but not in DNA?

• Guanine

•  

  Thymine

• Adenine

•  

  Uracil

Name those purine bases which are commonly found in DNA and RNA?

• Cytosine and guanine

• Adenine and thymine

• Cytosine and thymine

• Adenine and guanine

The primary structure of DNA and RNA proceeds in which direction?

•  

  3’ to 5’

•  

  5’ to 3’

•  

  4’ to 6’

• 5' to 5'

Which bond is used to stabilize the double helix of DNA?

• Covalent bond

• Hydrophobic bond

•  

  Ionic bond

• Hydrogen bond