WorksheetsDNA Structure
Total questions: 40
Worksheet time: 20mins
Name
Class
Date
1.
Which covalently bonded atoms will form STRONGER Hydrogen Bonds / Be MOST Polar?
a)
O – H
b)
C – H
c)
N – H
d)
S – H
2.
Which bonding Pair will be 'least polar'?
a)
O = O
b)
N – H
c)
O – H
d)
C – H
3.
Electron Affinity (Electronegativity) Decreases from...
a)
Lower Left to Upper Right
b)
Upper Right to Lower Left
c)
Upper Left to Lower Right
d)
Lower Right to Upper Left
4.
Deoxyribose Nucleic Acid is called this because...
a)
It is found in the nucleus
b)
It has a sugar missing one oxygen
c)
It is a bit acidic
d)
All of these are reasons for its name.
5.
Which part of the nucleotide makes DNA a bit 'acidic'?
a)
The Nitrogenous Base
b)
The Phosphate Group
c)
The Sugar (Deoxyribose)
d)
The Hydrogen Bonds it forms
6.
What is attached to the 2' Carbon of this Nucleotide?
a)
Two Hydrogen Atoms
b)
A Hydrogen Atom and an OH (Hydroxide)
c)
Nitrogen Base
d)
CH2
7.
What is attached to the 1' Carbon of this Nucleotide?
a)
Cytosine and a Hydrogen
b)
Thymine Only
c)
Thymine and a Hydrogen
d)
Cytosine Only
8.
Which nucleotide is being shown here?
a)
Thymine DNA Nucleotide
b)
Adenine DNA Nucleotide
c)
Guanine DNA Nucleotide
d)
Thymine RNA Nucleotide
9.
Which nucleotide is being shown here?
a)
Guanine DNA Nucleotide
b)
Guanine RNA Nucleotide
c)
Cytosine DNA Nucleotide
d)
Cytosine RNA Nucleotide
10.
This is a ____ DNA nucleotide.
a)
Cytosine
b)
Thymine
c)
Guanine
d)
Adenine
11.
What is attached to the 4' carbon?
a)
OH and H
b)
H and H
c)
CH2 and H
d)
Nitrogenous Base
12.
This image is that of...?
a)
RNA
b)
DNA
13.
Which base is attached to this nucleotide?
a)
Adenine
b)
Guanine
c)
Cytosine
d)
Thymine
14.
Which base is attached to this nucleotide?
a)
Adenine
b)
Guanine
c)
Cytosine
d)
Thymine
15.
The purine nitrogen bases are...
a)
Guanine and Adenine
b)
Thymine and Cytosine
c)
Guanine and Cytosine
d)
Adenine and Thymine
16.
The pyrimidine nitrogen bases are...
a)
Guanine and Adenine
b)
Thymine and Cytosine
c)
Guanine and Cytosine
d)
Adenine and Thymine
17.
What hold complementary bases (A–T, G–C) together?
a)
Covalent Bonds
b)
Hydrogen Bonds
c)
Ionic Bonds
d)
Peptide Bonds
18.
Phosphate Group is attached to the ____ Carbon of the Nucleotide Sugar.
a)
1'
b)
3'
c)
5'
d)
7'
19.
The 5' end of the DNA strand...
a)
Top Right
b)
Top Left
20.
Nucleotides can only be added to the ____ end of the DNA molecule.
a)
3'
b)
4'
c)
5'
d)
1'
21.
The 'back bone' of a DNA molecule is made of repeating...
a)
Phosphate / Nitrogen Bases
b)
Nitrogen Bases / Sugars
c)
Phosphate / Sugar
22.
DNA is entirely made of which Five Elements?
a)
C, H, O, P, N
b)
C, H, O, P, S
c)
C, O, P, N, S
d)
C, H, P, N, S
23.
A–T and C–G partner due to their...
a)
Similar Shape
b)
Similar Size
c)
Similar H-Bonds
d)
Similar Polarity
24.
This nucleotide contains a _____ sugar.
a)
Deoxyribose
b)
Ribose
25.
This image is a...
a)
Purine
b)
Pyrimidine
26.
This image is a...
a)
Purine
b)
Pyrimindine
27.
Which of these MAKES NO SENSE?
a)
Thymine RNA Nucleotide
b)
Uracil RNA Nucleotide
c)
Adenine DNA Nucleotide
d)
Guanine DNA Nucleotide
28.
Adenine and Thymine form ____ H-Bonds as partners.
a)
1
b)
2
c)
3
d)
4
29.
Guanine and Cytosine form ____ H-Bonds as partners.
a)
1
b)
2
c)
3
d)
4
30.
Which expression is most true, normally?
a)
Base Pair = Pyrimidine + Purine
b)
Base Pair = Pyrimindine + Pyrimidine
c)
Base Pair = Purine + Purine
d)
Base Pair = DNA Nucleotide + RNA Nucleotide
31.
Hydrogen bonds would not exist without...
a)
Electronegativity
b)
Oxygen
c)
Neutrons
d)
Strong Nuclear Forces
32.
This is which nitrogenous base?
a)
Thymine
b)
Guanine
c)
Cytosine
d)
Adenine
33.
This is which nitrogenous base?
a)
Thymine
b)
Guanine
c)
Cytosine
d)
Adenine
34.
This is which nitrogenous base?
a)
Thymine
b)
Guanine
c)
Cytosine
d)
Adenine
35.
This is which nitrogenous base?
a)
Thymine
b)
Guanine
c)
Cytosine
d)
Adenine
36.
How many Carbon atoms in this organic molecule.
a)
24
b)
23
c)
22
d)
20
37.
How many Hydrogen atoms in this organic molecule.
a)
27
b)
28
c)
26
d)
25
38.
DNA Nucleotides are composed of...
a)
Phosphate, Ribose, Nitrogenous Base
b)
Phosphate, Deoxyribose, Nitrogenous Base
c)
Ribose, Deoxyribose, and Phosphate Group
d)
Nitrogen Backbone, Pyrimidines and Purines
39.
Which location can new Nucleotides be added?
a)
Bottom Left
b)
Bottom Right
40.
Organic Molecules are generally made by or from living organisms and are mostly composed of ______ by mass.
a)
Carbon
b)
Nitrogen
c)
Hydrogen
d)
Oxygen
100 %
