BIOL1001 TEST 2 QUESTIONS WITH ANSWERS RATED A+
in the RNA sequence 5'-AUGCUAACG-3', which of the bases are classified as purines? -
adenine and guanine
in RNA, which base pairs with adenine - uracil
what is the structural difference between DNA and RNA - DNA is usually double stranded, RNA
is usually single stranded
which process is directly controlled by DNA through an RNA intermediate - protein synthesis
what is the term for the entire process by which DNA directs the synthesis of proteins - gene
expression
in a DNA double helix, which base pairs with adenine - thymine
in RNA, which base pairs with guanine - cytosine
in the famous Hershy and Chase blender experiment, radioactive sulphur was used to label
______ and radioactive phosphorus was used to level _____. the experiment results
demonstrated that the genetic material of a bacteriophage is _______. - protein, DNA, DNA
the two strands that form a DNA double helix are joined to each other through ______ -
hydrogen bonds between complementary nucleotide bases
working with streptococcus bacteria, Griffith showed that dead pathogenic bacteria cells could
______ living bacteria cells that were ______ into ______ - transform, nonpathogenic,
pathogenic
what was the conclusion of Griffith's experiment regarding the nature of the transforming
substance - it was an unknown heritable substance
why were proteins initially considered better candidates for genetic material than DNA - proteins
were easier to study in the lab
by interpreting experimental data gathered by other scientists, who built the double helix model
and contributed to the understanding of the antiparallel nature of the DNA strands - James
Watson, francis crick, and rosalind franklin
what effect does the antiparallel arrangement of DNA strands have on DNA replication - it
means the leading strand is synthesized continuously and the lagging strand is synthesized in
Okazaki fragments
, what was the surprising result of Griffith's experiment with streptococcus pneumonia - living
nonpathogenic bacteria became pathogenic when mixed with heat killed pathogenic bacteria
what was the conclusion of the Hershey-Chase experiment - DNA is the genetic material of
phage T2
what was the main reason scientists were skeptical about DNA being the genetic material -
DNAs physical and chemical properties seemed too uniform
what were the two main candidates for the genetic material before the 1940s - DNA and protein
in the DNA double helix, what does it mean for the strands to be antiparallel - the 5'-3' direction
of the strands are oriented in opposite directions
the information in DNA is contained in __________ - the sequence of nucleotides along the
length of the two strands of the DNA molecule
why was the specific pairing of adenine with thymine and guanine with cytosine crucial for
Watson and cricks model of DNA - 1. specific A-T and G-C base pairs accounted for Chargaff's
findings about the proportions of bases in species's DNA
2. it ensured the DNA double helix had a uniform diameter
the 5' end of a DNA strand always has a free _________ group, while the 3' end always has a
free _________ group - phosphate, hydroxyl
in the experiments we discussed, Hershey and Chase used a virus that infects bacteria called a
__________; this virus is composed of ________ and ________ - bacteriophage, DNA, protein
X-ray diffraction images produced by _________ showed that DNA is a _______ - Franklin,
double helix
which sugar component is found in DNA nucleotides - deoxyribose
working with Streptococcus bacteria, Griffith showed that dead bacteria cells that used to be
_____ could _______ living bacterial cells that were ______ into _______ cells - pathogenic,
transform, nonpathogenic, pathogenic
what was the main question Hershey and Chase aimed to answer in their experiment - whether
DNA or protein is the genetic material
identify the types of nitrogenous bases present in the DNA sequence 5'-ATGCGTAC-3' and
classify them as purines or pyrimidines - purines - A, G
pyrimidines - T, C
what did Hershey and Chase use to label the DNA and protein of the phages in their experiment -
radioactive phosphorus and sulfur
in the RNA sequence 5'-AUGCUAACG-3', which of the bases are classified as purines? -
adenine and guanine
in RNA, which base pairs with adenine - uracil
what is the structural difference between DNA and RNA - DNA is usually double stranded, RNA
is usually single stranded
which process is directly controlled by DNA through an RNA intermediate - protein synthesis
what is the term for the entire process by which DNA directs the synthesis of proteins - gene
expression
in a DNA double helix, which base pairs with adenine - thymine
in RNA, which base pairs with guanine - cytosine
in the famous Hershy and Chase blender experiment, radioactive sulphur was used to label
______ and radioactive phosphorus was used to level _____. the experiment results
demonstrated that the genetic material of a bacteriophage is _______. - protein, DNA, DNA
the two strands that form a DNA double helix are joined to each other through ______ -
hydrogen bonds between complementary nucleotide bases
working with streptococcus bacteria, Griffith showed that dead pathogenic bacteria cells could
______ living bacteria cells that were ______ into ______ - transform, nonpathogenic,
pathogenic
what was the conclusion of Griffith's experiment regarding the nature of the transforming
substance - it was an unknown heritable substance
why were proteins initially considered better candidates for genetic material than DNA - proteins
were easier to study in the lab
by interpreting experimental data gathered by other scientists, who built the double helix model
and contributed to the understanding of the antiparallel nature of the DNA strands - James
Watson, francis crick, and rosalind franklin
what effect does the antiparallel arrangement of DNA strands have on DNA replication - it
means the leading strand is synthesized continuously and the lagging strand is synthesized in
Okazaki fragments
, what was the surprising result of Griffith's experiment with streptococcus pneumonia - living
nonpathogenic bacteria became pathogenic when mixed with heat killed pathogenic bacteria
what was the conclusion of the Hershey-Chase experiment - DNA is the genetic material of
phage T2
what was the main reason scientists were skeptical about DNA being the genetic material -
DNAs physical and chemical properties seemed too uniform
what were the two main candidates for the genetic material before the 1940s - DNA and protein
in the DNA double helix, what does it mean for the strands to be antiparallel - the 5'-3' direction
of the strands are oriented in opposite directions
the information in DNA is contained in __________ - the sequence of nucleotides along the
length of the two strands of the DNA molecule
why was the specific pairing of adenine with thymine and guanine with cytosine crucial for
Watson and cricks model of DNA - 1. specific A-T and G-C base pairs accounted for Chargaff's
findings about the proportions of bases in species's DNA
2. it ensured the DNA double helix had a uniform diameter
the 5' end of a DNA strand always has a free _________ group, while the 3' end always has a
free _________ group - phosphate, hydroxyl
in the experiments we discussed, Hershey and Chase used a virus that infects bacteria called a
__________; this virus is composed of ________ and ________ - bacteriophage, DNA, protein
X-ray diffraction images produced by _________ showed that DNA is a _______ - Franklin,
double helix
which sugar component is found in DNA nucleotides - deoxyribose
working with Streptococcus bacteria, Griffith showed that dead bacteria cells that used to be
_____ could _______ living bacterial cells that were ______ into _______ cells - pathogenic,
transform, nonpathogenic, pathogenic
what was the main question Hershey and Chase aimed to answer in their experiment - whether
DNA or protein is the genetic material
identify the types of nitrogenous bases present in the DNA sequence 5'-ATGCGTAC-3' and
classify them as purines or pyrimidines - purines - A, G
pyrimidines - T, C
what did Hershey and Chase use to label the DNA and protein of the phages in their experiment -
radioactive phosphorus and sulfur
