BIOLOGY 1001 LSU HRINCEVICH
EXAM 3 2026 FINAL PAPER
PRACTICE QUESTIONS ANSWERS
ACCURATE A+
◉ The two polynucleotide chain in a DNA molecule are attached to each
other by what?
Answer: Hydrogen bonds between bases
◉ Inversions are movements of DNA from one chromosome to another.
True or False?
Answer: False
◉ In semi-consvervative replication, a DNA molecule serves as a
template for a new DNA molecule, which consists of either both
parental strands of DNA or both newly synthesized strands of DNA.
True or false?
Answer: False
◉ DNA posses what type or kinds of bases?
Answer: C,T,A, and G bases
◉ In the comparison of a DNA molecule to a twisted ladder, the
uprights of the ladder are what?
Answer: Deoxyribose linked to phosphate
,◉ Imagine that a DNA sequence of 5' A-C-G-T-A-C-G-T-3' is altered to
5'-A-C-G-C-A-C-G-T-3'. This could happen as a result of what type of
mutation or process?
Answer: Point mutation
◉ Why did scientists initially think DNA would be a poor candidate for
the hereditary information within a cell?
Answer: DNA was shown to be made of only four different kinds of
nucleotides
◉ Regarding the structure of DNA, the units that form the "uprights" of
the DNA ladder and do not attach to the nitrogen bases are what?
Answer: Phosphate molecules
◉ Which is true about the accuracy of DNA replication?
Answer: The few errors made by DNA polymerase are usually corrected
by repair enzymes
◉ Regarding the structure of DNA, which is covalently bonded to a
nitrogen-containing base?
Answer: Deoxyribose
◉ What is the relationship among DNA, a gene, and a chromosome?
, Answer: A chromosome contains hundreds of genes, which are
composed of DNA
◉ DNA ligase is important in the replication process because it can bind
together segments of DNA. True of False?
Answer: True
◉ In Griffith's experiments, what happened when heat killed S strain
bacteria were injected into a mouse along with live R-strain bacteria?
Answer: DNA from the heat-killed S-strain was taken up by the live R-
strain, converting them to S-strain and killing the mouse
◉ if a tRNA molecule that is specialized for the transfer of the amino
acid valine has the anticodon CAG, it will couple with which codon?
Answer: GUC
◉ Which of the following has two polynucleotide strands?
Answer: DNA
◉ Which of the following contains four types of nucleotides but no
uracil?
Answer: DNA
◉ The Barr body is the X chromosome in the cell that is expressed,
while the other X chromosome is inactivated.True or False?
EXAM 3 2026 FINAL PAPER
PRACTICE QUESTIONS ANSWERS
ACCURATE A+
◉ The two polynucleotide chain in a DNA molecule are attached to each
other by what?
Answer: Hydrogen bonds between bases
◉ Inversions are movements of DNA from one chromosome to another.
True or False?
Answer: False
◉ In semi-consvervative replication, a DNA molecule serves as a
template for a new DNA molecule, which consists of either both
parental strands of DNA or both newly synthesized strands of DNA.
True or false?
Answer: False
◉ DNA posses what type or kinds of bases?
Answer: C,T,A, and G bases
◉ In the comparison of a DNA molecule to a twisted ladder, the
uprights of the ladder are what?
Answer: Deoxyribose linked to phosphate
,◉ Imagine that a DNA sequence of 5' A-C-G-T-A-C-G-T-3' is altered to
5'-A-C-G-C-A-C-G-T-3'. This could happen as a result of what type of
mutation or process?
Answer: Point mutation
◉ Why did scientists initially think DNA would be a poor candidate for
the hereditary information within a cell?
Answer: DNA was shown to be made of only four different kinds of
nucleotides
◉ Regarding the structure of DNA, the units that form the "uprights" of
the DNA ladder and do not attach to the nitrogen bases are what?
Answer: Phosphate molecules
◉ Which is true about the accuracy of DNA replication?
Answer: The few errors made by DNA polymerase are usually corrected
by repair enzymes
◉ Regarding the structure of DNA, which is covalently bonded to a
nitrogen-containing base?
Answer: Deoxyribose
◉ What is the relationship among DNA, a gene, and a chromosome?
, Answer: A chromosome contains hundreds of genes, which are
composed of DNA
◉ DNA ligase is important in the replication process because it can bind
together segments of DNA. True of False?
Answer: True
◉ In Griffith's experiments, what happened when heat killed S strain
bacteria were injected into a mouse along with live R-strain bacteria?
Answer: DNA from the heat-killed S-strain was taken up by the live R-
strain, converting them to S-strain and killing the mouse
◉ if a tRNA molecule that is specialized for the transfer of the amino
acid valine has the anticodon CAG, it will couple with which codon?
Answer: GUC
◉ Which of the following has two polynucleotide strands?
Answer: DNA
◉ Which of the following contains four types of nucleotides but no
uracil?
Answer: DNA
◉ The Barr body is the X chromosome in the cell that is expressed,
while the other X chromosome is inactivated.True or False?
