wayground logo

Free Printable Worksheets

Font size

S
M
L
XL
Worksheets

9.1 DNA Structure

Total questions: 33

Worksheet time: 17mins

Name
Class
Date
1.

What makes up the backbone of a DNA ladder?

a)

nitrogen bases

b)

sugars & phosphates

c)

genes & chromosomes

d)

RNA

2.

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

a)

sugars & phosphates

b)

nitrogen bases

c)

sugars

d)

genes & chromosomes

3.

What SHAPE is DNA?

a)

single strand

b)

double strand

c)

double helix (twisted ladder)

d)

DNA has no clear shape

4.

In DNA, what base always pairs with Adenine?

a)

A

b)

T

c)

C

d)

G

5.

In DNA, what base always pairs with Cytosine?

a)

C

b)

T

c)

A

d)

G

6.

If one strand of a DNA molecule has the following order of bases, what will be the correct order of bases on the complementary (matching) strand?

AATTGGCC

a)

AATTGGCC

b)

TTAACCGG

c)

GGCCAATT

d)

GACTGACT

7.

What are the building blocks of DNA called ?

a)

nucleotides

b)

cytoplasm

c)

RNA

d)

phosphates

8.

Which is NOT one of the three parts of a nucleotide?

a)

sugar

b)

base

c)

ribosome

d)

phosphate

9.

Where is DNA found in a cell?

a)

ribosome

b)

cytoplasm

c)

mitochondria

d)

nucleus

10.

What is a section of DNA that codes for a specific protein called?

a)

RNA

b)

replication

c)

gene

d)

protein

11.

A copy of the DNA coding for a protein is sent out of the nucleus to the cytoplasm. What is that copy called?

a)

mRNA

b)

Uracil

c)

DNA

d)

phosphate

12.

During protein synthesis, DNA sends mRNA out of the nucleus to make what?

a)

identical DNA molecules

b)

genes

c)

proteins

d)

fats

13.

How does RNA differ from DNA?

a)

It is double stranded

b)

It has the sugar deoxyribose

c)

It has the base Uracil instead of Thymine

d)

It is not different- RNA is identical to DNA

14.

What does DNA stand for?

a)

Deoxyribonucleic acid

b)

Diribose nutride acidosis

c)

Dinitro acid

d)

Deoxynitrogenic acid

15.

Which scientists were (wrongly) credited with the discovery of the structure of DNA?

a)

Einstein and Darwin

b)

Watson and Crick

c)

Wallace and Cooper

d)

Wegener and Chargoff

16.

Fill in the matching bases that would appear on the top strand of the DNA molecule pictured, in order.


A G T C A T G A

a)

A G T C A T G A

b)

T T T A A A C C

c)

T C A G T A C T

d)

C A T G A G A T

17.

How many NUCLEOTIDES are there in the DNA molecule pictured?

a)

5

b)

10

c)

2

d)

20

18.

A nucleotide is made of:

a)
Sugar, Phosphate, nitrogen base
b)
Phosphate, Adenine, nitrogen base
c)

Thymine, Adenine, Cytosine

d)
Phosphate, Nitrogen, Adenine
19.
Which of the following best describes a DNA molecule?
a)
double helix
b)
contains ribose
c)
made of amino acids
d)
contains Uracil
20.
Which of the following units are repeatedly joined together to form a strand of DNA? (This is the MONOMER of DNA.) 
a)
amino acids
b)
nucleotides
c)
fatty acids
d)
polysaccharides
21.
Adenine bonds with ______________.
a)
Guanine
b)
Thymine
c)
Cytosine
d)
Adenine
22.
Guanine bonds with ______________.
a)
Adenine
b)
Guanine
c)
Cytosine
d)
Thymine
23.
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
24.
What are the 4 nitrogen bases?
a)
adenine, thymine, cytoplasm, and guanine
b)
adenine, thymine cytosine, and guanine
c)
adenine, thymine, cytosine, and gylcerol
d)
adenine, thymine, cytosine, and glucose
25.
Which 2 molecules forms the sides (backbone) of the DNA ladder?
a)
deoxyribose and adenine
b)
deoxyribose and a hydrogen bond
c)
sugar and the nucleus
d)
deoxyribose (sugar) and phosphate
26.
Which organelle is DNA usually found in?
a)
cell membrane
b)
vacuole
c)
chloroplast
d)
nucleus
27.
Which sequence of DNA bases would pair with this partial strand
ATG TGA CAG
a)
ATG TGA CAG
b)
TAC ACT GTC
c)
GTA AGT GAC
d)
CAT TCA CTG
28.
Nitrogenous bases are joined by which type of bond?
a)
polar bonds
b)
ionic bonds
c)
covalent bonds
d)
hydrogen bonds
29.
The sugar in DNA is ?
a)
sucrose
b)
glucose
c)
deoxyribose
d)
fructose
30.

A complex molecule containing the genetic information that makes up the chromosomes.

a)

deoxyribose

b)

deoxyribonucleic acid (DNA)

c)

nucleotide

d)

gene

31.

The chemicals that make up the rungs of the DNA ladder.

a)

deoxyribose

b)

phosphate

c)

nitrogen bases

d)

nucleotides

32.

A gene:

a)

Is a specific sequence of nucleotide

b)

Is a set of chromosomes

c)

Forms part of a nucleotide

d)

Is found on a chromosome.

33.

Name of the bond holding the complementary nitrogenous pairs together:

a)

helium bond

b)

oxygen bond

c)

hydrogen bond

d)

nitrogen bond

Similar Resources on Wayground

Ecology - Final

30 questions

Ecology - Final

quiz

Worksheet

•

9th Grade

Skeletal and Muscular System

28 questions

Skeletal and Muscular System

quiz

Worksheet

•

7th Grade

PBS 2020 Quiz 5 Unit 1.2 The Findings in a Autopsy

28 questions

PBS 2020 Quiz 5 Unit 1.2 The Findings in a Autopsy

quiz

Worksheet

•

9th Grade - University

grade 7 - photosynthesis recap quiz

35 questions

grade 7 - photosynthesis recap quiz

quiz

Worksheet

•

7th Grade

Modern Classifiction

28 questions

Modern Classifiction

quiz

Worksheet

•

9th Grade

Grade 7 - Cells and Reproduction

36 questions

Grade 7 - Cells and Reproduction

quiz

Worksheet

•

7th - 8th Grade

Mitosis

33 questions

Mitosis

quiz

Worksheet

•

KG - University

UCEA Yr 8 LP3 Interim Assessment

30 questions

UCEA Yr 8 LP3 Interim Assessment

quiz

Worksheet

•

7th - 8th Grade