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Ch 12 DNA Part 1
Test Description: DNA questions
Instructions: Answer all questions to get your test result.
1) Avery’s experiments showed that bacteria are transformed by
A
carbohydrates.
B
proteins.
C
DNA.
D
RNA.
2) What did Griffith observe when he injected a mixture of heat-killed, disease-causing bacteria and live harmless bacteria into mice?
A
The mice were unaffected.
B
The disease-causing bacteria changed into harmless bacteria.
C
The harmless bacteria died.
D
The mice developed pneumonia.
3) What would Hershey and Chase have concluded if both radioactive 32P and 35S were found in the bacteria in their experiment?
A
Genes are made of protein.
B
The virus’s DNA was not injected into the bacteria.
C
Both the virus’s protein coat and its DNA were injected into the bacteria.
D
The virus’s protein coat was not injected into the bacteria.
4) Which of the following is a nucleotide found in DNA?
A
deoxyribose + phosphate group + cytosine
B
deoxyribose + phosphate group + uracil
C
ribose + phosphate group + uracil
D
ribose + phosphate group + thymine
5) Because of base pairing in DNA, the percentage of
A
adenine molecules in DNA is about equal to the percentage of guanine molecules.
B
purines in DNA is much greater than the percentage of pyrimidines.
C
cytosine molecules in DNA is much greater than the percentage of guanine molecules.
D
pyrimidines in DNA is about equal to the percentage of purines.
6) In eukaryotes, DNA
A
is located in the nucleus
B
floats freely in the cytoplasm
C
is located in the ribosomes.
D
is circular.
7) During mitosis, the
A
DNA molecules unwind.
B
histones and DNA molecules separate.
C
DNA molecules become more tightly coiled.
D
nucleosomes become more tightly packed.
8) Which of the following include all the others?
A
chromosomes
B
histones
C
nucleosomes
D
DNA molecules
9) DNA is copied during a process called
A
replication.
B
transformation
C
transcription.
D
translation.
10) DNA replication results in two DNA molecules,
A
one with two new strands and the other with two original strands.
B
each with two new strands.
C
each with one new strand and one original strand
D
each with two original strands.
*select an answer for all questions
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