Pages in this set

Page 1

Preview of page 1
Application booklet

Structure of DNA ­ Reference pages 3-5 knowledge booklet
ACTIVITY 1

Read the information on page 3 about the structure of DNA in silence and
highlight all the key scientific words. Pick out the relevant keyword cards from
your envelope.

Page 2

Preview of page 2

ACTIVITY 2
Draw the structure of a nucleotide and label the 3 components:







ACTIVITY 3
The diagram is showing a short section of DNA. Study the diagram carefully
and add annotations for the following
What patterns do you notice?
What do you notice about the two chains?
Anything else?
Label…

Page 3

Preview of page 3
Working in pairs & using the DNA modelling kit
a) synthesise a double stranded DNA molecule
b) hydrolyse a double stranded DNA molecule

Use your knowledge of condensation and hydrolysis to show how water is
involved in these reactions.

Place your DNA molecule onto a mini white board and together…

Page 4

Preview of page 4
PURINE PHOSPHATE DNA MOLECULE NUCLEOTIDE PYRIMIDINE

Smallest Largest

PHOSPHATE ­ PYRIMIDINE ­ PURINE ­ NUCLEOTIDE ­ GENE - DNA
MOLECULE

Q3. What is meant by the term complementary base pairing?
......Adenine always pairs with Thymine & vice versa
Cytosine always pairs with guanine & vice versa .................................

Q4. If the…

Page 5

Preview of page 5
3. Ignore phosphorus, Ignore molecule
3




(iii)
Name of base Percentage

Thymine 34

Cytosine / Guanine 16

Adenine 34

Cytosine / Guanine 16



Spelling must be correct to gain MP1
First mark = names correct
Second mark = % correct, with adenine as 34%




M3. (a) nucleotide
1

(b) (i)…

Page 6

Preview of page 6
1

(ii) 36
If (c)(i) incorrect accept [50 ­ (c)(i)]
1




(d) Different proteins

Different genes

Different (DNA) base sequences
2 max
[7]





M5 . (i) A = 31 and JT = 31
C = 19
2

(ii) viral DNA singlestranded / not doublestranded
evidence from table e.g. not equal…

Page 7

Preview of page 7
nucleotides are joined together by phopshodiester bonds forming
between them by the enzyme ...DNA Polymerase ............ - forms a
polynucleotide strand;
the two new DNA molecules are identical to each other and to the original
DNA;
each newly formed DNA molecule contains one of the original
polynucleotide strands, hence the…

Page 8

Preview of page 8
sample of these bacteria (generation 1) was then removed. The DNA in the
bacteria of generation 1 was extracted and spun in a high-speed centrifuge.

The bacteria in the 14
N medium were allowed to divide one more time. The DNA
was also extracted from these bacteria (generation 2) and…

Page 9

Preview of page 9



(a) each strand copied/acts as a template 2
(daughter) DNA one new strand and one original/parent strand


(b) (i)15
N/ tube B
(DNA), more/greater density
1
(reject heavier)

(ii)DNA with one heavy and one light strand 2

new/synthesised strand, made with 14N/ light strand
Total 5
marks



Genetic Code ­…

Page 10

Preview of page 10
out the amino acid names in the correct order.

_Met__ __Pro__ __Asn__ __Tyr__ __Pro___ __Arg__ __Pro___ __Asn__
__Asp_

Step 3 Double check that you have the correct number of amino acids to triplets.

Typical questions

How many different amino acids does the gene code for?

Be careful with this one,…

Comments

No comments have yet been made

Similar Biology resources:

See all Biology resources »See all resources »