Flashcards in #1 Deck (34):
Identify the components of the different Nucleic Acids.
5 carbon sugar
Draw the chemical structure for Deoxyribonucleic Acid nucleotide.
Identify the 3’ Carbon and the 5’ Carbon on the DNA nucleotide.
Locate the PO43- and the OH- molecules on the nucleotide.
Identify the location of the Nitrogen Base on the nucleotide.
Draw and explain the difference in chemical structure between RNA and DNA.
RNA has OH & OH
DNA has H & OH
Locate Telomeres on a human chromosome.
Ends of the chromosomes
Specify the base pairs present in telomeres, and their specific pattern.
Chromosomes can have how many telomeres and bp
2500 telomeres & 15000 bp
Some telomeres are lost when
On the lagging strand during replication
How many telomeres & bp are lost during replication
Once a cell loses enough telomeres,
It can't divide anymore
-about 50 divisions
Explain the function of Telomerase and how it is related to aging and tumor proliferation.
Telomerase forms new telomeres & copies in the reverse direction (3'-5')
Adult cells don't have what
Cancer cells reactivate what
Explain the significance of the Genetic Code; what it is, where it is located, what it does, and
how it contributes to life.
The genetic code is the order of the nitrogen base pairs in DNA
If you change the order of the nitrogen bases & you change the characteristics of an organism
DNA is laid down in the
5' to 3' direction
The leading strand goes
3' to 5'
The lagging strand goes
5' to 3'
The lagging strands form what
Making more DNA
Leading strand starts where
At the origin & moves towards 5'
Lagging strand starts at
Replication fork & moves towards origin
Unzips and untwisted DNA for replication
The DNA helicase forms what
Replication fork is held open by
Original DNA is the
Breaks hydrogen bonds
Usuable bp are floating in nucleus
Bp match up with template bp
Go in order, building new forms 5' -3'
DNA polymerase 3 forms
Hydrogen bonds between nitrogen bases to complete the new DNA strand
Proof reads the new DNA strand
After h bonds form between
DNA polymerase 3 connects the sugar & phosphate groups to complete the new strand st DNA
Lagging strand replication
Helicase still untwists & unzips DNA
Must be replicated starting from replication fork
Short pieces of rna to start replication
Okazaki fragements Te connect by