Avery's experiments showed that bacteria are transformed by...
a. RNA c.proteins
b. DNA d. carbohydrates
what did Griffith observe when he injected a mixture of heat-killed, disease-killing bacteria and live harmless bacteria into mice?
a. the disease-causing bacteria changed into harmless bacteria
b.the mice developed pneumonia
c.Genes are made of protein
d.Both the virus's protein coat and its DNA were injected into the bacteria.
D. both the virus's protein coat and its DNA were injected into the bacteria.
what would Hershey and Chase have concluded if both radioactive 32p and 35s were found in the bacteria in their experiment?
a.the virus's protein coat was not injected into the bacteria.
b.the virus's DNA was not injected into the bacteria
c. Genes are made of protein
d. Both the virus's protein coat and its DNA were injected into the bacteria
D. both the virus's protein coat and it's DNA were injected into the bacteria
Figure 12-1 shows the structure of a (an)
a.DNA molecule c.RNA molecule
b.Amino acid d. protein
a. DNA molecule
which of the following is a nucleotide found in DNA?
because of base pairing in DNA, the percentage of
a.adenine molecules in DNA is about equal to the percentage of guanine molecules
b.pyrimidines in DNA is about equal to the percentage of purines
c.purines in DNA is much greater than the percentage of pyrimidines.
d.cytosine molecules in DNA is much greater than the percentage of guanine molecules
b. pyrimidines in DNA is about equal to the percentage of purines.
in eukaryotes, DNA
a. is lobated in the nucleus
b.floats freely in the cytoplasm
c.is located in the ribosomes
a. is located in the nucleus.
which of the following include all the others?
DNA is copied during a process called
DNA replication results in 2 DNA molecules
a.each with two new strands
b.one with two new strands and the other with two original strands
c.each with one new strand and one original strand
d. each with two original strands
c. each with one new strand and one original strand
during DNA replication, a DNA strand that has the bases CTAGGT produces a strand with the bases
what combines with sugar and a phosphate group to form a nucleotide?
a.amino acid b.deoxyribose
c.glycerol d.nitrogenous base
d. nitrogenous base
what was the conclusion of Hershey and Chase's experiments?
a.DNA from the bacteriophage entered the bacteria
b.DNA from the bacteriophage became bacterial DNA
c.protein from the bacteriophage entered the bacteria
d.protein from the beginning became bacterial DNA
a. DNA from the bacteriophage entered the bacteria
based on the study, what did scientists conclude about the DNA composition of all organisms?
a.A,G,T and C occur in equal %
b.A and G occur in equal %, and T and C occur in equal %
c.A and T occur in equal %, and G and C occur in equal %
d.A and C occur in equal %, and T and G occur in equal %.