Bio 141 Exam 3 2026 | Actual Exam Questions
and Correct Answers | Graded A+ | Verified
Answers | Newest Version | Just Released
The role of DNA in heredity was first discovered by studying _____ ---------
CORRECT ANSWER-----------------bacteria and the viruses that infect them
What is the definition of transformation? ---------CORRECT ANSWER-----------------a
change in genotype and phenotype due to the assimilation of foreign DNA
What would mixing heat killed remains of a pathogenic strain with living cells of a
harmless strain, which yields some living cells becoming pathogenic be an
example of? ---------CORRECT ANSWER-----------------Transformation
In transformation, what is the substance that is transformed? ---------CORRECT
ANSWER-----------------DNA
Viruses that infect bacteria are called _______ ---------CORRECT ANSWER-------------
----bacteriophages
,A virus is _____ ---------CORRECT ANSWER-----------------DNA (sometimes RNA)
enclosed by a protective coat, often simply protein
DNA is a ______ ---------CORRECT ANSWER-----------------polymer of nucleotides
DNA consists of.... ---------CORRECT ANSWER-----------------A nitrogenous base, a
sugar, and a phosphate group
The evidence of ______ made DNA a more credible candidate for the genetic
material ---------CORRECT ANSWER-----------------diversity
Nitrogenous Bases ---------CORRECT ANSWER-----------------Thymine, Adenine,
Guanine, and Cytosine
Chargaff's rules: ---------CORRECT ANSWER------------------Base composition of DNA
varies between species
-In any species the number of A and T bases are equal and the number of G and C
bases are equal
,Purine + Pyrimidine = ---------CORRECT ANSWER-----------------width consistent with
X-ray data
Nitrogenous bases that are purines: (Pentagon on Hexagon) ---------CORRECT
ANSWER-----------------A and G
Nitrogenous bases that are pyrimidines: (hexagon) ---------CORRECT ANSWER-------
----------T and C
The relationship between structure and function in manifest in the ______ ---------
CORRECT ANSWER-----------------double helix
In DNA replication, the parent molecule unwinds, and __________ are built based
on base pairing rules ---------CORRECT ANSWER-----------------two new daughter
strands
ACTAG(left) binds with TGATC(right) to form the parental molecule ---------
CORRECT ANSWER-----------------Stands will separate and form new strands. ACTAG
will bind with a new TGATC and TGATC will bind with a new ACTAG
, Mendel developed a hypothesis to explain the ______ inheritance pattern he
observed in ____ offspring ---------CORRECT ANSWER-----------------3:1, F2
Alternative versions of genes account for..... ---------CORRECT ANSWER----------------
-Variations in inherited genes
Alternative versions of a gene are called ________ ---------CORRECT ANSWER-------
----------Alleles
Each gene resides at a specific _______ on a specific chromosome ---------
CORRECT ANSWER-----------------Locus
An organism inherits ____ alleles, _____ from each parent ---------CORRECT
ANSWER-----------------2, 1
T or F: the two alleles at a particular locus may be identical. ---------CORRECT
ANSWER-----------------True, an example is in the true breeding plants of Mendel's
P generation
T or F: In the F1 hybrids, the locus may differ ---------CORRECT ANSWER---------------
--True
and Correct Answers | Graded A+ | Verified
Answers | Newest Version | Just Released
The role of DNA in heredity was first discovered by studying _____ ---------
CORRECT ANSWER-----------------bacteria and the viruses that infect them
What is the definition of transformation? ---------CORRECT ANSWER-----------------a
change in genotype and phenotype due to the assimilation of foreign DNA
What would mixing heat killed remains of a pathogenic strain with living cells of a
harmless strain, which yields some living cells becoming pathogenic be an
example of? ---------CORRECT ANSWER-----------------Transformation
In transformation, what is the substance that is transformed? ---------CORRECT
ANSWER-----------------DNA
Viruses that infect bacteria are called _______ ---------CORRECT ANSWER-------------
----bacteriophages
,A virus is _____ ---------CORRECT ANSWER-----------------DNA (sometimes RNA)
enclosed by a protective coat, often simply protein
DNA is a ______ ---------CORRECT ANSWER-----------------polymer of nucleotides
DNA consists of.... ---------CORRECT ANSWER-----------------A nitrogenous base, a
sugar, and a phosphate group
The evidence of ______ made DNA a more credible candidate for the genetic
material ---------CORRECT ANSWER-----------------diversity
Nitrogenous Bases ---------CORRECT ANSWER-----------------Thymine, Adenine,
Guanine, and Cytosine
Chargaff's rules: ---------CORRECT ANSWER------------------Base composition of DNA
varies between species
-In any species the number of A and T bases are equal and the number of G and C
bases are equal
,Purine + Pyrimidine = ---------CORRECT ANSWER-----------------width consistent with
X-ray data
Nitrogenous bases that are purines: (Pentagon on Hexagon) ---------CORRECT
ANSWER-----------------A and G
Nitrogenous bases that are pyrimidines: (hexagon) ---------CORRECT ANSWER-------
----------T and C
The relationship between structure and function in manifest in the ______ ---------
CORRECT ANSWER-----------------double helix
In DNA replication, the parent molecule unwinds, and __________ are built based
on base pairing rules ---------CORRECT ANSWER-----------------two new daughter
strands
ACTAG(left) binds with TGATC(right) to form the parental molecule ---------
CORRECT ANSWER-----------------Stands will separate and form new strands. ACTAG
will bind with a new TGATC and TGATC will bind with a new ACTAG
, Mendel developed a hypothesis to explain the ______ inheritance pattern he
observed in ____ offspring ---------CORRECT ANSWER-----------------3:1, F2
Alternative versions of genes account for..... ---------CORRECT ANSWER----------------
-Variations in inherited genes
Alternative versions of a gene are called ________ ---------CORRECT ANSWER-------
----------Alleles
Each gene resides at a specific _______ on a specific chromosome ---------
CORRECT ANSWER-----------------Locus
An organism inherits ____ alleles, _____ from each parent ---------CORRECT
ANSWER-----------------2, 1
T or F: the two alleles at a particular locus may be identical. ---------CORRECT
ANSWER-----------------True, an example is in the true breeding plants of Mendel's
P generation
T or F: In the F1 hybrids, the locus may differ ---------CORRECT ANSWER---------------
--True
