WorksheetsRL DNA Structure 1
Total questions: 22
Worksheet time: 11mins
Name
Class
Date
1.
The backbone of the DNA structure is composed of:
a)
Sugar and Phosphate
b)
Sugar
c)
Phosphate
d)
Nitrogenous Base
2.
The bond that holds the nitrogenous bases together are WEAK bonds called:
a)
Hydrogen Bonds
b)
Nitrogen Bonds
c)
Carbon Bonds
d)
Phosphodiester Bonds
3.
There are _________ bonds between Adenine and Thymine and ________ bonds between Guanine and Cytosine .
a)
Two;Three
b)
Two;Four
c)
Three;Two
d)
Four;Two
4.
Which statement about DNA structure is correct?
a)
The two strands are identical and run in the same direction.
b)
The two sides are identical and run in opposite direction.
c)
The two sides are complementary and run in the same direction.
d)
The two sides are complementary and run in opposite direction.
5.
Which nitrogen base pairs with Adenine?
a)
Arganine
b)
Cytosine
c)
Guanine
d)
Thymine
6.
Which nitrogen base pairs with Guanine?
a)
Adenine
b)
Cytosine
c)
Thymine
d)
Arganine
7.
Which scientists determined the shape of DNA
a)
Francis Crick & James Watson
b)
Alfred Hershey and Martha Chase
c)
Rosalind Franklin & Maurice Wilkins
8.
Name this structure
a)
double helix
b)
nucelotide
c)
twisted ladder
d)
hydrogen bond
9.
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
10.
The 5' end of DNA is marked by a(n)
a)
Phosphate Group
b)
Hydroxyl Group
c)
Purine
d)
Pyrimidine
11.
Which of the following best describes a DNA molecule?
a)
double helix
b)
contains ribose
c)
made of amino acids
d)
contains Uracil
12.
Which 2 molecules form the sides (backbone) of the DNA ladder?
a)
deoxyribose sugar and adenine
b)
deoxyribose sugar and a hydrogen bond
c)
deoxyribose sugar and the nucleus
d)
deoxyribose sugar and phosphate
13.
Nitrogenous bases are joined by which type of bond?
a)
polar bonds
b)
ionic bonds
c)
covalent bonds
d)
hydrogen bonds
14.
Name this structure
a)
double helix
b)
nucelotide
c)
twisted ladder
d)
hydrogen bond
15.
Which sequence of DNA bases would pair with this partial strand
ATG TGA CAG
ATG TGA CAG
a)
ATG TGA CAG
b)
TAC ACT GTC
c)
GTA AGT GAC
d)
CAT TCA CTG
16.
DNA is called the "blueprint of life" because
a)
it is like a fingerprint
b)
it has a blue color
c)
it contains the plans for building an organism
d)
it can relay messages to other molecules
17.
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
18.
Nucleotides are made up of a sugar, phosphate, and..?
a)
nitrogenous base
b)
nucleic acid
c)
cholesterol
d)
fatty acid
19.
Watson & Crick discovered the structure of DNA. They called it the _____________model:
a)
helical
b)
double-helix
c)
double-stranded
d)
twisted ladder
20.
Replicate the following strand of DNA:
AATCATGGA
AATCATGGA
a)
AATCATGGA
b)
TTAGTACCT
c)
UUAGUACCU
d)
GGATAUCUA
21.
The enzyme that unzips the DNA to prepare for replication
a)
helicase
b)
replicase
c)
polymerase
d)
synthase
22.
In what phase of the cell cycle does DNA replication take place?
a)
G1
b)
S
c)
G2
d)
M
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