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