Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
15 Cards in this Set
- Front
- Back
|
The molecular structure of DNA is made of long units called...
|
nucleotides
|
|
|
Each nucleotide consists of...
|
5-carbon sugar (deoxyribose), phosphate group, nitrogenous base
|
|
|
The nitrogenous bases consist of...
|
Purines and Pyrimidines
|
|
|
Purines have 2 rings and consist of...
|
adenine and guanine
|
|
|
Pyrimidines have one ring and consist of...
|
cytosine and thymine
|
|
|
The backbone (sides of the ladder) of the DNA structure consists of...
|
sugar and phosphate
|
|
|
Nitrogenous bases...
|
stick out sideways from the backbone, the "rungs of the ladder"
|
|
|
Nucleotides can be joined together...
|
in any order, any sequence is possible.
|
|
|
In 1952, Francis Crick and James Watson discovered...
|
DNA is a double helix, 2 strands wound around each other "twisted ladder"
|
|
|
Hydrogen bonds...
|
form between bases with just enough force to hold strands together
|
|
|
Nitrogenous Base pairing...
|
adenine=thymine
cytosine=guanine |
|
|
In Prokaryotic cells (bacteria), DNA is found in the ___________, because the do/do not have a nucleus.
|
cytoplasm, do not
|
|
|
In Eukayotic cells, DNA is found in the ___________, because the do/do not have a nucleus.
|
nucleus, do
|
|
|
Length of DNA molecules...
|
Very Long!!!
|
|
|
DNA replication takes place in
|
interphase
|
