Date
Class
BUI~LD
h
B· t
.f
.__
.oJ .. , ..
,":.1
)!.:
;., ,:" ';::', : ,'.' A flowchart is a way to show the steps in a process. As you read Lesson
1, think about all the experiments that scientists performed to understand the job of
DNA in cells. Reflect on what scientists learned from each experiment. The three
flowcharts below summarize these experiments.
Results
Exp.lPurpose
Researcher
.>'"
"""-
/ l~arYV\l(s) bacfer/C\ ";
Griffith
frCf/l5
'0
{V (rvlCJ lido
~bac1er/{J, YfJJ
(he /uJ
fa dOl tAa'()eJ
1
CtW)el
l'Vhe
I
;
. "'~
I
,
d
CYlrVIYlE.5 [o "
k/I ( Ca. vb '), frdJ&
/1'11 J<,. t.:
0t((fo,t'q
"~"
fils
I
bN)J
1,
l--(Qf\c"
he4+-IL//1e
,
fa
!,
\
. , ~.:r
~be/cJ 'M~nuileic :
: 4C/J5 ~ hader/ fAvr:s;
I
.•
• Hershey and Chase
!
bttCieYJ0,
diseC()L.
//JJJe
Avery
M
SOrvJ("
6
: W /~
r; d/o CdJiV e.
, +rq (((') ,
.
" ..... i.,
{\s
~~
fo(fYI'!J
.l«.
\
Complete this graphic organizer to summarize the assumptions that guided research
on DNA in the middle ofthe twentieth century. Use an oak tree to give an example of
each function.
DNA must perform three functions:
./
"
f
Function:
Copying information
Function:
...,
r
i'
!Why this function
': 0A111
vtI~
j \ftlrJ
COli
is important:
tes tvf. /)
1(01
If)f5 ::
.' Why this function
} 6 eYlJIC
/'rl
is important:
tor
1YlJ/~f)
~
dfYel()fmff\~ ,muof he (Of~\cJ
~
;
lJ(card-e,Iy,
everY;1
~aJ\d Cht{Y'ClLfrn'si,'cs,
i.
~I
: cu.l d/ v, S;cjV/
,
~
"
Example:
Euc
v
A rlatJ)jf( cui ~
Aa VI]
Vne. .sam e.
~a~ eC{cA -oL/her.
'1
bN1
:1
'l.
"
, ",I;".~
:
,",i"~
,
<>,' The main job of DNA is to store genetic
information. Genes must have the information needed to produce traits such as
eye color or blood type.
Make a list of six things about this dog that are controlled by its DNA
A.
l!eljJ
D.
1-0/1
B.
~a./r rJ)a (
E.
ear /(''(J \fA
c.
eye
CO)Dy
Je~1 'I--;
F._----.:....J_IC_t!_d
_
For Questions 1-5, complete each statement by writing in the correct word or words.
4. The building blocks of DNA are
IIuLtra
l de ~
.
/
5. Nucleotides i~DNA are made of three basic cmpponents: a sugar called
j) bO';vJ Ad} e
, and a nitrogenous
/}Q:; e..
6. D~
c/lltllllll(,
JJ/).~)eofi~e >
I
Yen A e..
cohtain:rour kinds of nitrogenous bases:
and CI,iLQ5{(j ~ .
7. In DNA,
deoJ..\I(, }D.)e,a
.-fAt'"," e. ,
I
can be joined in any order.
8. The nucleotides in DNA are joined by
C()~) e
Ilt
bonds.
9. Complete the table to describe each scientist's contribution to solving the structure of
DNA.
:.(' I ••.•.
,".
.':.
~ ••
~•.
,
• "."1' " ·i •.~.:.. ,\~'~;.
t}
:,DNA sample
1
2
3
> ••.
~I
'.......• ,
':.:'.
Percent of
adenine
Percent of
thymine
, 31.5
Percent of
: guanine
....... 'J.~'
..
•
. ---.._..•;;
.. _ .. _ , ._::)<2
., ...-. ·c.. ,.. ,....:.:L,··." c.• :.c,.:.?.~.:,
3~
...:..r -': .~.: .; •. ;.;c..•
!(5.~-20. ..
32-::.....
'::.C ...;;;,.....
,,,,/.;7:
__ __.__
. __
.", .•••.
" -s
""1
Percent of
: cytosine
/?'.sr-
-~--~.- ..-----.,,"..'-
~_.<??~..
>•. ::.',c..,,,..•.• -.' ~~.c •.• ::.,','",-;'"
..., ....•.... '. c:,r.~
For Questions 8-13, on the lines provided, label the parts of the DNA molecule that
correspond to the numbers in the diagram.
12.
__ . __' _
...The drawing below shows half of a DNA molecule. Fill in the
appropriate letters for the other half. Explain why you drew your sketch the way you did.
-
r---
C
<
A
) T
G
>
>
G
G
_.
t:
L
'~"'-'C"-'--<'''--''G''''"''c
<
G
T
(
A
A
)
--I
C
<
G
Key
A=Adenine
C Cytosine
G= Guanine
T=Thymine
=
-
'--
Answer the questions.
13. What nucleotide is always paired with thymine?
/Jden'/l e-.
14. What nucleotide is always paired with guanine?
(y I::OSI A c....
15. Whose rule does base pairing prove? Cho..t;lC{
1/:5
16. Suppose a strand of DNA has the followin{code on one side.
AGT
CCA
GTA
What would be the matching other side of a DNA strand?
['CD GGr elf T