Biology Final Exam (IRSC) Questions
and Answers Graded A+
Requirements for natural selection - Correct answer-individual variation, variation
must affect reproductive success, variation must have a genetic basis
Genetic drift - Correct answer-random fluctuations in allele frequencies over time
due to chance
how does it affect populations - Correct answer-can lead to large changes in
populations over a short period of time.( more likely to occur in small population
Scientific theory - Correct answer-a well established concept backed up by tests
What happens during crossing-over? - Correct answer-the exchange of
chromosome segments between nonsister chromatids in meiosis. Crossing over
creates new combinations of genes in the gametes that are not found in either
parent, contributing to genetic diversity.
Differences between passive transport and active transport - Correct answer-
passive: "just happens" due to a concentration gradient active: requires ATP
which of the following is not true about DNA - Correct answer-
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, polymer - Correct answer-long molecules built by linking monomers
monomer - Correct answer-small, similar subunits to polymers
polymers and their monomers - Correct answer-carbohydrates-monosaccharides
nucleic acid-nucleotide
protein-amino acids
Is a lipid a polymer? - Correct answer-no
M 1 vs M 2 - Correct answer-M1 creates two cells M2 creates four cells, M1 has
synapsis and crossing over and M2 doesn't M1 separates homologous
chromosomes M2 separates sister chromatids
nucleus - Correct answer-repository of DNA
plasma membrane - Correct answer-protects the cell
cell wall - Correct answer-structural support
cytoplasm - Correct answer-suspends organelles
plasmodesmata - Correct answer-transport and communication
mitochondria - Correct answer-power house
central vacuole - Correct answer-storage and maintenance of turgor pressure
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and Answers Graded A+
Requirements for natural selection - Correct answer-individual variation, variation
must affect reproductive success, variation must have a genetic basis
Genetic drift - Correct answer-random fluctuations in allele frequencies over time
due to chance
how does it affect populations - Correct answer-can lead to large changes in
populations over a short period of time.( more likely to occur in small population
Scientific theory - Correct answer-a well established concept backed up by tests
What happens during crossing-over? - Correct answer-the exchange of
chromosome segments between nonsister chromatids in meiosis. Crossing over
creates new combinations of genes in the gametes that are not found in either
parent, contributing to genetic diversity.
Differences between passive transport and active transport - Correct answer-
passive: "just happens" due to a concentration gradient active: requires ATP
which of the following is not true about DNA - Correct answer-
©COPYRIGHT 2025, ALL RIGHTS RESERVED 1
, polymer - Correct answer-long molecules built by linking monomers
monomer - Correct answer-small, similar subunits to polymers
polymers and their monomers - Correct answer-carbohydrates-monosaccharides
nucleic acid-nucleotide
protein-amino acids
Is a lipid a polymer? - Correct answer-no
M 1 vs M 2 - Correct answer-M1 creates two cells M2 creates four cells, M1 has
synapsis and crossing over and M2 doesn't M1 separates homologous
chromosomes M2 separates sister chromatids
nucleus - Correct answer-repository of DNA
plasma membrane - Correct answer-protects the cell
cell wall - Correct answer-structural support
cytoplasm - Correct answer-suspends organelles
plasmodesmata - Correct answer-transport and communication
mitochondria - Correct answer-power house
central vacuole - Correct answer-storage and maintenance of turgor pressure
©COPYRIGHT 2025, ALL RIGHTS RESERVED 2
