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DNA
DNA
42
Science
7th Grade
03/09/2009

Additional Science Flashcards

 


 

Cards

Term

Recall that in _ of the cell cycle of the DNA_

Definition

1 Late interphase

2 replicates

Term

- occurs in the neluleus of the cell when the genetic info is stored

Definition
1 replication
Term

how do u spell DNA

 

Definition
Deoxyribonucleic acid
Term

- are one of the 5 categories of chemical compounds in cell

Definition
1 Neucleic acid
Term
what are the 5 categories of the chemical compound  
Definition
carbohydrates, lipids, proteins, and water, and neucleic acids
Term
- cells contain DNA execpt for -
Definition

1 all

2 red blood cells

Term
in order to understand now DNA - we must understand its - 
Definition

1 replicates

2 structure

Term
A DNA molecule has a form of a -
Definition
1 double helix
Term
the 2 outer layers of the twisted strands of - and - molecules connected to one another
Definition

1 suger

2 phosphate

Term

suger and phosphate are connected in the middle by -

Definition
1 nitrogen bases
Term

there are 4 nitrogen bases

 

Definition
  • Adenine
  • Thymine
  • Guanine
  • Cytosine
Term

Adenine pairs with

Definition
Thymine
Term
Guanine pairs with
Definition
Cytosine
Term
building blocks of DNA are
Definition
necleotids
Term

in 1950 who was a unique scientist

Definition
erwin Chargaff
Term

Erwin chargaff studyed the amounts of - and - are always the same. And that - and - are always the same

Definition

1 thymine

2 adenine

3 guanine

4 cytosine

 

Term
Who used the x- ray cyrstallography
Definition

Rosalind Franklin

Term

Rosalin franklin determined that DNA ws a double helix structure and is a - of diff types of molecules.

Definition
1 polmer
Term
what was the date of Rosalin Franklin
Definition
1951
Term
did james and francis win the noble prize
Definition

yes

 

Term
what did francis and james propose
Definition
that DNA is a spiraled doulble helix
Term
what r spiraled doubled helix's made of
Definition

nucleotids

(suger + phosphate + nitrogen bases)

Term
when did the nobel prize happen
Definition
1962
Term
who
Definition
DNA
Term
What
Definition
Replication
Term
when
Definition
late interphase
Term
where
Definition
in the nucleus
Term
why
Definition

replication happens so that each new daughter cell will have its own copey of dna

Term
how mant steps r there
Definition
3
Term
what is the first step
Definition
an enzyme ''unzips'' the dna double helix bi breaking the hytrogen bonds that hold together the nitrogen bases together
Term
what is the 2 stage
Definition

nucleotides cone into the nuleus from the cytosplsmand match up to the template, and then suger and phosphate join new handrails form  

Term
what is the 3rd stage
Definition
each new DNA molecule is made up of the original strand and one new strand
Term
who did experiments on mice
Definition
Oswald Chargaff
Term
who study's suggested that DNA was the geninetc material
Definition
Oswald Avery
Term

Oswald Avery with his study's scentist were-

what date a was he -

Definition

1 skeptical

2 1940

Term

what are chromosome exploration

Definition

charomsome were made up of DNA raped around proteins

 

thought DNA to simple to make human beings

Term
when did mic happen
Definition
1920
Term
who was a german reseacher
Definition
Friedrich Miescher
Term
what did friedrich Miescher do
Definition
first person to icealate and identifi DNA in the pus of bandages
Term

what time did Fred happen

Definition
1860
Term

did fred no what he had

Definition
no
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