Download Ch. 4 Nucleic Acids Define

Chapters 4
Supplemental Instruction
Iowa State University
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Course:
Instructor:
Date:
Nur
Bio 212
Kukday
Jan 21, 2016
Ch. 4 Nucleic Acids
Define:
Deoxyribonucleic Acid
Deoxyribonucleotide
Purines
Ribonucleic Acid
Ribonucleotide
Antiparallel
Phosphodiester Bond
Condensation Reaction
Double Helix
Nucleotide
Pyrimidines
Ribozymes
1. What is the name of the structure shown below? Define its 3 components.
2. Which one of the below is the sugar of RNA and which of DNA?
3. What characteristics make a ribonucleotide more reactive than a deoxyribonucleotide?
4. A __________ reaction occurs between nucleotides to make a __________ bond.
a. What two functional groups of nucleotides are involved in this bond?
b. In what direction does the bond form? (Hint: 3’ to 5’ or 5’ to 3’?)
5. A __________bond is formed between complementary base pairs of a DNA double-helix.
_________ are RNAs that have enzymatic function.
6. A DNA molecule has a cytosine content of 30%. What percent would be the uracil content of
its RNA?
Critical Thinking
We know that two strands of DNA form a double helix when they bond via hydrogen bonds.
Regions in DNA rich in G and C nucleotides are harder to break apart. What might be the
reason?