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DNA Review
Test Description: STAAR review
Instructions: Answer all questions to get your test result.
1) A segment of nucleic acid is analyzed to see whether it is DNA or RNA. The nucleic acid can be identified as DNA if it contains
A
nucleotide bases
B
deoxyribose sugars
C
hydrogen bonds
D
phosphate groups
2) What is the complementary strand of a section of DNA with the nitrogen bases GTC?
A
GTC
B
CAG
C
ATG
D
CGT
3) Assume that the DNA of an organism contains 20% adenine (A). What percentage of thymine (T) would be in this DNA?
A
80%
B
20%
C
30%
D
60%
4) What would you expect to find in all organisms?
A
the same four DNA nucleotides
B
the same percentages of DNA base pairs
C
the same sequence of DNA nucleotides in the DNA molecules
D
the same genetic information
5) Three nucleotides in mRNA are UGA. What were the three DNA nucleotides that transcribed this mRNA sequence?
A
AGU
B
ACU
C
UGA
D
ACT
6) Before each cell divides, the DNA must duplicate itself by
A
transformation
B
transcription
C
replication
D
translation
7) DNA controls the trait's of an organism thorugh the sequence of
A
carbon bases
B
centromeres
C
chromosomes
D
nitrogen bases
8) Changes in the DNA sequence that affect genetic information are known as
A
replications
B
transformations
C
mutations
D
prokaryotes
9) The process by which the genetic code of DNA is copied into a strand of RNA is called
A
translation
B
replication
C
transcription
D
transformation
10) DNA codes for the synthesis of
A
lipids
B
proteins
C
nucleic acids
D
carbohydrates
*select an answer for all questions
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