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DNA And GENES
Test Description: What is the structure and function of DNA?
Instructions: Answer all questions to get your test result.
1) What letters represent the four nitrogenous bases?
A
U, T, G, and C
B
A, T, G, and X
C
G, T, A, and D
D
A, T, G, and C
2) Watson and Crick build a model of DNA that looked like a ________________________.
A
single helix
B
straight line
C
twisted ladder
D
double pyramid
3) To be copied, DNA molecules splits ________________________.
A
down the middle
B
one pair of bases only
C
along the phosphates
D
along the sugars
4) The sides of DNA's ladder structure are made of _____________________ and _____________________.
A
sugars and phosphates
B
sugars and phospholipids
C
phosphates and bases
D
adenine and thymine
5) The rungs of the ladder structure of DNA are made of _________________________.
A
a pair of phosphates
B
a set of proteins
C
a pair of sugars
D
a pair of bases
6) A string of nucleotides that code for a specific trait is called a _________________________.
A
nucleus
B
cell
C
gene
D
chromosome
7) DNA stands for _______________________.
A
tRNA
B
deoxyribosome adenine
C
donuts rot always
D
deoxyribonucleic acid
8) DNA is made of subunits called ______________________.
A
nucleotides
B
gene
C
amino acids
D
proteins
9) Nucleotides are made of _______________________.
A
a phosphate, a protein, and two bases
B
a ribosome, a sugar, and two bases
C
a phosphate, a sugar, and a ribosome
D
a phosphate, a sugar, and a base
10) The amount of adenine in DNA always equals the amount of _________________.
A
all of the answers are correct
B
guanine
C
cytosine
D
thymine
11) Guanine always pairs with which nitrogenous base?
A
any base
B
thymine
C
cytosine
D
adenine
12) The complementary strand for the DNA sequence TAGTCA is?
A
ATCACT
B
GACAGT
C
ATCAGT
D
TAGGCT
13) Pairs of bases match up because they are ______________________ to one another.
A
replicates
B
the same
C
opposite
D
complementary
14) DNA must _____________________ before a cell divides.
A
replicate
B
phosphate
C
eliminate
D
mutate
15) DNA can be wound so tightly that it fits in a(n) ______________________ inside the nucleus of a eukaryotic cell.
A
chromosome
B
gene
C
ribosome
D
nucleotide
16) If one nucleotide base is changed in a strand of DNA then this is called a ______________________________.
A
chromosome pair
B
mutation
C
DNA fingerprint
D
complementary strand
*select an answer for all questions
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