Central Dogma- Practice for the Unit Test Test

What is Z pointing to?

• Hydrogen Bond

• Pentose Sugar

• Phosphate

What is Y pointing to?

• Hydrogen Bonds

• Pentose Sugar

• Phosphate

Which of the following correctly lists and describes the pyrimidine nitrogenous bases?

• A & T, double rings

• A & T, single ring

• C, T; single ring

• C, T; double ring

DNA looks like a “twisted ladder”. If the “rungs” of the ladder are made up of nitrogenous bases, what are the handrails or backbone of the ladder made up of?

• Sugars and Salts

• Phosphates

• Sugars

• Sugars and Phosphates

DNA strands run _____ in relation to each other.

• antiparallel

• parallel

• perpendicular

• both a and b

A nucleotide in DNA is composed of _____.

• a deoxyribose sugar, a phosphate, and a nitrogen base

• only a deoxyribose sugar and a nitrogen base

• only a deoxyribose sugar and a phosphate

• none of the above

Between the two strands of a DNA segment the nitrogen bases are held together by _____.

• covalent bonds

• hydrogen bonds

• ionic bonds

• metallic bond

What type of bond is found between the sugar-phosphate backbone?

• hydrogen bonds

• ionic bonds

• phosphodiester bonds

• crazy glue

How many hydrogen bonds are between C and G?

• one

• two

• three

Which of the following is the monomer (building block) of DNA?

• nucleotide

• monosaccharide

• amino acid