Chapter 3: Nucleic Acids, Proteins, and Enzymes Flashcards
Nucleic Acids
Polymers that store, transmit, and express genetic information
Nucleic acids are made up of what type of monomers?
They are made of nucleotides
What are the two types of nucleic acids?
- Deoxyribonucleic acid (DNA)
2. Ribonucleic acid (RNA)
What does DNA do?
It stores and transmits genetic information
What does RNA do?
Carries information of amino acids from genes to where proteins are made
Nucleic acids and proteins encoded by DNA and RNA determine what?
They determine the metabolic functions of an organism
Nucleotides
Are monomers of nucleic acids
What are the three components of nucleotides?
- Nitrogen-containing base
- A pentose sugar (Ribose in RNA or deoxyribose in DNA)
- One to three phosphate groups
Nucleosides
Are molecules containing nitrogen base and a pentose sugar that doesn’t have phosphate groups
Pyrimidine
a 6 membered single-ringed structure
Purine
A fused double-ringed structure
What are nucleotide bonded in?
Condensation reaction to form phosphodiester linkages
Condensation reactions
A chemical reaction where 2 molecules are joined together by a covalent bond to make a larger, more complex molecule, with the loss of a small molecule
Phosphodiester linkages
linkage between the 3’(prime) carbon aton of 1 sugar molecule and the 5’ (prime) carbon atom of another
What are the 4 bases of DNA?
- Adenine (A)
- Cytosine (C)
- Guanine (G)
- Thymine (T)
What are the 4 bases of RNA?
- Adenine (A)
- Cytosine (C)
- Guanine (G)
- Uracil (U)
DNA is composed of what?
They are composed of 2 polynucleotide strands (double-stranded)
What is RNA structure?
It is single-stranded and can fold upon itself, forming a variety of structures
Complementary Base Pairing
Nitrogenous bases (A, C, G, and T/U) of the DNA and RNA molecules bond with one another and are held together by hydrogen bonds
Transcription
When DNA sequence can be copied into RNA
Translation
When RNA specifies the amino acid sequence of a protein from transcription
What are the function of proteins?
- Enzyme
- Defense proteins
- Hormonal and regulatory proteins
- Receptor proteins
- Storage proteins
- Structural proteins
- Transport proteins
- Genetic Regulatory protein
Amino Acids
Are the building blocks of proteins and are monomers that make up polymers in protein
What are the 2 functional groups in amino acids?
- Nitrogen-containing amino acid group (base)
2. the (acidic) carboxyl group