Flashcards
BMS04-1034-Lec - Nucleic Acids
Cards in this deck (17)
- 1What are 4 properties of genetic material?1. Replication
2. Storage of information
3. Expression of information
4. Variation by mutation - 2What are the three parts of a nucleotide?1. Nitrogenous base (Purine/Pyrimidine)
2. Pentose Sugar
3. 1/2/3 Phosphates - 3Which three nitrogenous bases are pyrimidines?Uracil (U)
Thymine (T)
Cytosine (C) - 4Which two nitrogenous bases are purines?1. Adenine (A)
2. Guanine (G) - 5What is the difference in structures between pyrimidines and purines?Pyrimidines have one ring, while purines (A/G) have two rings connected
- 6On a sugar, which carbon does the base pair connect to? Which carbon does the phosphate connect to?1. C1 connects sugar and base pair
2. C5 connects phosphate and sugar - 7Base+ Sugar=nucleoside Base+ sugar + phosphate= .... Base+ sugar + 2x phosphate=... Base+ sugar + 3x phosphate=...Nucleoside monophosphate
Nuceloside diphosphate
Nucleoside triphosphate - 8Why is DNA replicated in the 5'-3' direction?Because each base nucleotide is attached via its sugar (On C5) to the C3 of the nucleotide above it
- 9What bond links sugar and phosphate groups together?5'-3' Phosphodiester bonds
- 10DNA is a ...handed helix with ... nucleotides per turnRight
10 - 11What is the bonding between bases?Hydrogen bonding
- 12What can lead to denaturation of DNA?1. Heat
- Tm is temp where 1/2 of DNA is lost
- G-C regions denature at higher temp
2. Chemicals - 13Of the following, which is the only form of DNA that is left handed: A, B, ZZ Form
- 14Where is DNA located?Nucleus/mitochondria of eukaryote cell
Cytoplasm in bacteria
Nucleus+chloroplast in plants - 15Eukaryotes have ...dsDNA while prokaryotes have ...dsDNA (shape) How are eukaryotic/prokaryotic proteins bonded to protein differently?1. Long, linear
2. Singel circular, supercoiled
3. Eukaryotes are bonded to proteins to form chromatins, prokaryotes are packaged IN protein to form nucleoids (also have plasmids) - 16What is a genome?Entire set of genes in an organisms chromosome (can be DNA or RNA)
- 17What is the ratio of purines to pyrimidines?1:1
Information
- Description
- characteristics of genetic material (replication, storage, expression, variation). historical evidence showing DNA is the genetic material. evidence used to solve the molecular structure of DNA in 1953. structures of bases (purines and pyrimidines), sugars, and nucleotide.s The double helical structure of DS DNAeg. the hydrogen bonds between the bases, the phosphate backbone/ phosphodiester bonds,complementary strands, antiparallel DNA, directionality Where in eukaryote/prokaryote
- Created by
- Evian Chai · Apr 2020
- Updated
- May 13, 2020
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