BIOL 1001 REAL EXAM 2025 PRACTICE QUESTIONS
AND CORRECT ANSWERS/ BIOLOGY 1002 LSU PREP
WITH 130 EXAM PRACTICE QUESTIONS AND
CORRECT VERIFIED ANSWERS
The "heat" in chilli peppers is due to a molecule called capsaicin. Suppose you breed only the hottest
chilli peppers over many generations. Predict the characteristics of the resulting individuals.
a) larger fruits
b) smaller fruits
c) less capsaicin
d) more capsaicin - CORRECT ANSWER-d) more capsaicin
What is the difference between a ribonucleotide and a deoxyribonucleotide?
a) ribonucleotides contain a phosphate group
b) ribonucleotides have a hydroxyl group on the 2" carbon of their sugar subunit
c) ribonucleotides contain a sugar with five carbon atoms
d) ribonucleotides have a hydrogen atom on the 1" carbon of the sugar subunit - CORRECT
ANSWER-b) ribonucleotides have a hydroxyl group on the 2" carbon of their sugar subunit
Which of the following nitrogenous bases are purines?
a) cytosine and uracil
b) cytosine and thymine
c) cytosine, uracil and thymine
d) adenine and guanine - CORRECT ANSWER-d) adenine and guanine
Which of the following nitrogenous bases is found in RNA, but not DNA?
a) thymine
b) adenine
c) uracil
,d) guanine - CORRECT ANSWER-c) uracil
a nucleotide is made up of which of the following subunits?
a) a 5-carbon sugar, a phosphate group and a nitrogenous base
b) a 5-carbon sugar, three phosphate groups, and a nitrogenous base
c) a 5-carbon sugar and a nitrogenous base
d) a 5-carbon, an amino group an an "R-group" - CORRECT ANSWER-a) a 5-carbon sugar, a
phosphate group and a nitrogenous base
What forms the "backbone" of a nucleic acid?
a) a chain of sugar and phosphate groups, linked through phosphodiester bonds
b) purine and pyrimidine pairs, hydrogen-bonded to each other
c) a chain of amino and carboxyl groups, linked via peptide bonds
d) a double helix of antiparallel strands - CORRECT ANSWER-a) a chain of sugar and phosphate
groups, linked through phosphodiester bonds
What dictates the primary structure of a nucleic acid?
a) the sequence of bases
b) the amino acid sequence
c) the double helix
d) the hairpin loops - CORRECT ANSWER-a) the sequence of bases
What is responsible for holding the two strands together in the DNA double helix?
a) hydrophobic interactions
b) hydrogen bonds
c) ionic bonds
d) covalent bonds
e) phosphodiester bonds - CORRECT ANSWER-b) hydrogen bonds
Why do many researchers consider RNA to be the best candidate for the first life-form?
a) it is simply in structure
, b) it is capable of self-replication and catalysis
c) it carries more information than any other molecule
d) all of its nucleotide components have been created under laboratory conditions that mimic early
earth - CORRECT ANSWER-b) it is capable of self-replication and catalysis
You have just sequenced a new protein found in mice and observe that sulfur-containing cysteine
residues occur at regular intervals. What is the significance of this finding?
a) cysteine residues are required for the formation of a-helices and b-pleated sheets
b) it will be important to include cysteine in the diet of mice
c) cysteine residues are involved in disulfide bridges that help form tertiary structure
d) cysteine causes bends, or angles, to occur in the tertiary structure of proteins - CORRECT
ANSWER-c) cysteine residues are involved in disulfide bridges that help form tertiary structure
You are studying a protein that is shaped like a doughnut. The shape is a function of which level(s) of
protein structure
a) primary only
b) secondary only
c) tertiary only
d) secondary and tertiary only
e) primary, secondary and tertiary - CORRECT ANSWER-e) primary, secondary and tertiary
Which of the following observations is the strongest argument in favour of the hypothesis that
protein structure and function are correlated?
a) proteins function best at certain temperatures
b) proteins have four distinct levels of structure and many functions
c) enzymes tend to be globular in shape
d) denatured (unfolded) proteins do not function normally - CORRECT ANSWER-d) denatured
(unfolded) proteins do not function normally
Which of the following best describes primary structure in proteins?
a) it is the number of amino acids present in the complete protein
b) it is the number of peptide bonds in the complete protein
AND CORRECT ANSWERS/ BIOLOGY 1002 LSU PREP
WITH 130 EXAM PRACTICE QUESTIONS AND
CORRECT VERIFIED ANSWERS
The "heat" in chilli peppers is due to a molecule called capsaicin. Suppose you breed only the hottest
chilli peppers over many generations. Predict the characteristics of the resulting individuals.
a) larger fruits
b) smaller fruits
c) less capsaicin
d) more capsaicin - CORRECT ANSWER-d) more capsaicin
What is the difference between a ribonucleotide and a deoxyribonucleotide?
a) ribonucleotides contain a phosphate group
b) ribonucleotides have a hydroxyl group on the 2" carbon of their sugar subunit
c) ribonucleotides contain a sugar with five carbon atoms
d) ribonucleotides have a hydrogen atom on the 1" carbon of the sugar subunit - CORRECT
ANSWER-b) ribonucleotides have a hydroxyl group on the 2" carbon of their sugar subunit
Which of the following nitrogenous bases are purines?
a) cytosine and uracil
b) cytosine and thymine
c) cytosine, uracil and thymine
d) adenine and guanine - CORRECT ANSWER-d) adenine and guanine
Which of the following nitrogenous bases is found in RNA, but not DNA?
a) thymine
b) adenine
c) uracil
,d) guanine - CORRECT ANSWER-c) uracil
a nucleotide is made up of which of the following subunits?
a) a 5-carbon sugar, a phosphate group and a nitrogenous base
b) a 5-carbon sugar, three phosphate groups, and a nitrogenous base
c) a 5-carbon sugar and a nitrogenous base
d) a 5-carbon, an amino group an an "R-group" - CORRECT ANSWER-a) a 5-carbon sugar, a
phosphate group and a nitrogenous base
What forms the "backbone" of a nucleic acid?
a) a chain of sugar and phosphate groups, linked through phosphodiester bonds
b) purine and pyrimidine pairs, hydrogen-bonded to each other
c) a chain of amino and carboxyl groups, linked via peptide bonds
d) a double helix of antiparallel strands - CORRECT ANSWER-a) a chain of sugar and phosphate
groups, linked through phosphodiester bonds
What dictates the primary structure of a nucleic acid?
a) the sequence of bases
b) the amino acid sequence
c) the double helix
d) the hairpin loops - CORRECT ANSWER-a) the sequence of bases
What is responsible for holding the two strands together in the DNA double helix?
a) hydrophobic interactions
b) hydrogen bonds
c) ionic bonds
d) covalent bonds
e) phosphodiester bonds - CORRECT ANSWER-b) hydrogen bonds
Why do many researchers consider RNA to be the best candidate for the first life-form?
a) it is simply in structure
, b) it is capable of self-replication and catalysis
c) it carries more information than any other molecule
d) all of its nucleotide components have been created under laboratory conditions that mimic early
earth - CORRECT ANSWER-b) it is capable of self-replication and catalysis
You have just sequenced a new protein found in mice and observe that sulfur-containing cysteine
residues occur at regular intervals. What is the significance of this finding?
a) cysteine residues are required for the formation of a-helices and b-pleated sheets
b) it will be important to include cysteine in the diet of mice
c) cysteine residues are involved in disulfide bridges that help form tertiary structure
d) cysteine causes bends, or angles, to occur in the tertiary structure of proteins - CORRECT
ANSWER-c) cysteine residues are involved in disulfide bridges that help form tertiary structure
You are studying a protein that is shaped like a doughnut. The shape is a function of which level(s) of
protein structure
a) primary only
b) secondary only
c) tertiary only
d) secondary and tertiary only
e) primary, secondary and tertiary - CORRECT ANSWER-e) primary, secondary and tertiary
Which of the following observations is the strongest argument in favour of the hypothesis that
protein structure and function are correlated?
a) proteins function best at certain temperatures
b) proteins have four distinct levels of structure and many functions
c) enzymes tend to be globular in shape
d) denatured (unfolded) proteins do not function normally - CORRECT ANSWER-d) denatured
(unfolded) proteins do not function normally
Which of the following best describes primary structure in proteins?
a) it is the number of amino acids present in the complete protein
b) it is the number of peptide bonds in the complete protein
