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