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