DNA Structure

Which of the following best describes a DNA molecule?

• double helix
• contains ribose
• made of amino acids
• contains Uracil

Which of the following units are repeatedly joined together to form a strand of DNA?

• amino acids
• nucleotides
• fatty acids
• polysaccharides

In eukaryotes, DNA is usually found in the​ (a)   , while in prokaryotes, DNA is found in the ​ (b)   .

• nucleus
• cytoplasm

Nitrogenous bases are joined by which type of bond?

• polar bonds
• ionic bonds
• covalent bonds
• hydrogen bonds

What are the three components of a nucleotide?

• ribose, hydrogen, nitrogen base

• deoxyribose, oxygen, nitrogen base

• deoxyribose, phosphate, nitrogen base

• ribose, phosphate, protein

DNA and RNA are macromolecules in the category of

• Proteins
• Lipids
• Nucleic Acids
• Carbohydrates

Which of the following is a base that is NOT contained in DNA?

• Adenine
• Thymine
• Uracil
• Guanine

Which 2 molecules form the sides (backbone) of the DNA ladder?

• deoxyribose sugar and adenine
• deoxyribose sugar and a hydrogen bond
• deoxyribose sugar and the nucleus
• deoxyribose sugar and phosphate

If there is 37% guanine how much cytosine is there?

• 77%
• 47%
• 37%
• 57%

What does DNA stand for?

• Deoxyribonucleic acid
• Denitrogenous acid
• Deribonucleic acid
• Diribonucleic acid