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DNA Structure Practice Quiz
Test Description: This is a basic review of DNA structure.
Instructions: Answer all questions to get your test result.
1) The DNA molecule is made of many different parts. Which structure is considered the individual building block?
A
a nucleotide
B
a deoxyribose sugar
C
2 nitrogen bases joined together
D
a phosphate group
2) When looking at the DNA molecule as a whole, it has/is _________________.
A
neutral (no charge)
B
a negative charge
C
a positive charge
D
sometimes positively and sometimes negatively charged.
3) Which of these structures within the DNA molecule causes it to have a negative charge?
A
the phosphate
B
the nitrogen base
C
the deoxyribose sugar
D
the hydrogen bonds
4) Which of the following combinations correctly describes the bonds found within the DNA molecule?
A
strong covalent bonds hold together every component of the DNA molecule
B
weak hydrogen bonds hold together the sugars and phosphates, while strong covalent bonds hold together the nitrogen bases
C
weak covalent bonds hold together the nitrogen bases, while strong hydrogen bonds hold together the sugars and phosphates
D
weak hydrogen bonds hold together the nitrogen bases, while strong covalent bonds hold together the sugars and phosphates
5) Adenine, guanine, thymine, and cytosine are all examples of:
A
nitrogen bases
B
sugars
C
types of bonds
D
phosphates
6) In a DNA molecule, the number of _____________ will equal the number of thymines because they always base pair together.
A
uracils
B
cytosines
C
guanines
D
adenines
7) Which nitrogen base is able to base pair with guanine?
A
adenine
B
cytosine
C
uracil
D
thymine
8) Which vocabulary term is used to describe the sides of the DNA ladder?
A
backbone
B
backside
C
nitrogen bases
D
wishbone
9) The backbone of the DNA molecule contains which two structures?
A
guanines and cytosines
B
deoxyribose sugars and nitrogen bases
C
deoxyribose sugars and phosphates
D
nitrogen bases and phosphates
10) To which part of the backbone are the nitrogen bases attached to?
A
phosphates
B
both deoxyribose sugars and phosphates
C
deoxyribose sugars
D
sometimes deoxyribose sugars, sometimes phosphates
11) The name of the nitrogen base that starts with the letter A is __________.
A
adenine
B
argenine
C
alanine
D
aspartame
12) The name of the nitrogen base that starts with the letter C is
A
cytosine
B
calanine
C
cuanine
D
cytoplasm
13) When DNA is in its condensed form, it is called
A
a histone protein
B
a chromosome
C
chromatin
D
a nucleotide
14) One section within the DNA molecule that codes for a specific trait is called a:
A
nitrogen base pair
B
genome
C
nucleotide
D
gene
15) Which of these elements is NOT found in the DNA molecule?
A
nitrogen
B
sulfur
C
oxygen
D
carbon
*select an answer for all questions
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