Question

match the following terms with their correct definition

1. double helix
2. nucleotides
3. deoxyribose
4. dna
5. hydrogen bond
6. adenine
7. cytosine

a. a five - carbon sugar
b. type of bond that holds the double helix together
c. one of three parts of a nucleotide made of one or two rings of carbon and nitrogen atoms
d. subunits that make up dna
e. one of two pyrimidines used as a nitrogen base in nucleotides
f. one of two purines used as a nitrogen base in nucleotides
g. abbreviation for deoxyribonucleic acid
h. 2 strands of nucleotides twisted around each other

Explanation:

• Double helix: DNA has a double - helix structure which is described as 2 strands of nucleotides twisted around each other (matches H).
• Nucleotides: They are the subunits that make up DNA (matches D).
• Deoxyribose: It is a five - carbon sugar (matches A).
• DNA: Abbreviation for deoxyribonucleic acid (matches G).
• Hydrogen bond: The type of bond that holds the double helix together (matches B).
• Adenine: One of two purines used as a nitrogen base in nucleotides (matches F).
• Cytosine: One of two pyrimidines used as a nitrogen base in nucleotides (matches E).

Answer:

1. H
2. D
3. A
4. G
5. B
6. F
7. E