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