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DNA Structure and Replication

Total questions: 37

Worksheet time: 24mins

Name
Class
Date
1.

What makes up the SIDES of a DNA ladder?

a)

nitrogen bases

b)

Deoxyribose sugars & phosphates

c)

genes & chromosomes

d)

RNA

2.

What makes up the rungs (center) of a DNA ladder?

a)

sugars & phosphates

b)

nitrogen bases

c)

sugars

d)

genes & chromosomes

3.

What SHAPE is DNA?

a)

single strand

b)

straight ladder

c)

double helix (twisted ladder)

d)

DNA has no shape

4.

In DNA. what base always pairs with A?

a)

A

b)

T

c)

C

d)

G

5.

What is DNA made up of?

a)

nucleotides

b)

cytoplasm

c)

RNA

d)

cells

6.
Why is DNA important?
a)
it is very small and very complicated
b)
it's in everything
c)
it serves as the blueprint for traits of all living things
d)
because we eat it every day for energy
7.
Cytosine always pairs with
a)
Adenine
b)
Thymine
c)
Uracil
d)
Guanine
8.
Guanine bonds with ______________.
a)
Adenine
b)
Guanine
c)
Cytosine
d)
Thymine
9.

Which enzyme is responsible for adding the free nucleotides to the replicating DNA? ​

a)

DNA Helicase

b)

DNA Ligase

c)

DNA polyermase

d)

RNA Polymerase

10.
DNA replication results in two DNA molecules,
a)
each one with two original strands
b)
each one with two new strands
c)
each one with one new strand and one original strand
d)
one with two new strands and the other with two original strands
11.

Choose the correct complementary nucleotide sequence for the following:

GGG - ACT - TTT

a)

CCC - TGA - AAA

b)

AAA - CAG - GGG

c)

TTT - CAT - GGG

d)

GGG - TGA - CCC

12.

Choose the correct complementary nucleotide sequence for the following:

TTT - GTC - CCC

a)

CCC - TGA - AAA

b)

AAA - CAG - GGG

c)

TTT - CAT - GGG

d)

GGG - TGA - CCC

13.

Choose the correct complementary nucleotide sequence for the following:

AAA - GTA - CCC

a)

CCC - TGA - AAA

b)

AAA - CAG - GGG

c)

TTT - CAT - GGG

d)

GGG - TGA - CCC

14.

Choose the correct complementary nucleotide sequence for the following:

CCC - ACT - GGG

a)

CCC - TGA - AAA

b)

AAA - CAG - GGG

c)

TTT - CAT - GGG

d)

GGG - TGA - CCC

15.

According to the Base pair rule, if a DNA molecule contains 1500 adenines how many thymine's will it contain?

a)

1500

b)

500

c)

0

d)

1000

16.

According to the Base pair rule, if a DNA molecule contains 2 cytosine's how many guanines will it contain?

a)

1500

b)

2

c)

0

d)

1000

17.

According to the Base pair rule, if a DNA molecule is made up of 25% cytosine bases what percentage of the molecule will be Thymine?

a)

0%

b)

22%

c)

25%

d)

50%

18.

Which of the following is not a DNA base?

a)

adenine (A)

b)

guanine (G)

c)

cytosine (C)

d)

histidine (H)

19.

What is the complementary strand to this DNA sequence: ATACCGCTG

a)

TATGGCGAC

b)

ATACCGCTG

c)

CGCAATAGT

d)

GCGTTATCA

20.

Nucleotides consist of all of the following except:

a)

a phosphate

b)

a sugar

c)

a base

d)

a nucleic acid

21.

DNA is located in the _____ in eukaryotic cells.

a)

nucleus

b)

cytoplasm

c)

mitochondria

d)

ribosome

22.

At the end of replication, how many DNA molecules are there?

a)

1

b)

2

c)

12

d)

6

23.

What is the first step in DNA replication?

a)

DNA unzips

b)

bases are added

c)

sugar and phosphate are added

d)

sugar and bases are added

24.

The shape of DNA is arranged as:

a)

a double helix

b)

one strand of nucleotides

c)

squiggly lines

d)

a single nucleotide

25.

What are the correct base pair rules in DNA?

a)

A-T and C-G

b)

A-C and T-G

c)

A-G and C-T

d)

A-A, C-C, G-G, and T-T

26.

How is everyone's DNA different if there are only 4 bases in DNA?

a)

the base are arranged differently in each person

b)

each person has 4 different bases

c)

DNA is NOT different, everyone's is the same

d)

I don't know :(

27.

Why does DNA replicate?

a)

It likes to have a friend around

b)

It needs to have multiple copies of DNA molecules in each cell

c)

It needs to make a copy before the cell divides so each cell has the complete DNA

d)

to make proteins

28.

What are the complementary bases that would pair with this DNA strand: CTAATGT

a)

GATTACA

b)

AGCCGTG

c)

CTAATGT

d)

TCGGCAC

29.

______ and ______ won the Nobel Prize for discovering the structure of DNA.

a)

Watson; Crick

b)

Johnson; Smick

c)

Franklin; Wick

d)

Best; DNA man

30.

_______________ took the X-Ray photo that helped identify the structure of DNA

a)

Franklin

b)

Crick

c)

Watson

d)

Einstein

31.

When your cells copy their DNA, this is called . . .

a)

replication

b)

copying

c)

hydrolysis

d)

awesome copy

32.

A nucleotide includes...?

a)

sugar

b)

nitrogen base

c)

phosphate group

d)

all of the above

33.
Name this structure
a)
double helix
b)
nucelotide
c)
twisted ladder
d)
hydrogen bond
34.
Put in order smallest to largest:
a)
Chromosome - DNA - Gene
b)
Gene - DNA - Chromosome 
c)
DNA - Gene  Chromosome
d)
Chromosome - Gene  - DNA
35.

DNA replication is the process of....

a)

making less DNA

b)

making more DNA

36.

How many different types of nucleotides are there in DNA?

a)

1

b)

2

c)

3

d)

4

37.

In a nucleotide what is the part that has variation and can be different?

a)

Sugar

b)

Phosphate

c)

Nitrogen Base

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