Biology Final Exam Practice Test Questions with
Verified Answers.
What is mRna and what is used for? - Correct Answer Copies the DNA code so that it can
leave the nucleus; takes the code to the rRNA site
Adenine, Thymine, Cytosine, & Guanine are what? - Correct Answer The 4 nitrogen
bases in DNA
What are the 4 nitrogen base pairs for RNA ? - Correct Answer A-U & C-G
rRna, forms the complex at the ribosome the serves as the site where proteins are made.
True or False - Correct Answer True
An allele is a variation of a gene? True or False - Correct Answer True
Bb = genotype of heterozygous individual & the phenotype would be black hair results
from results from what dominate hair type and recessive? - Correct Answer Black hair is
dominant & yellow is recessive
Describe & provide and example of a polygenic inheritance? - Correct Answer Polygenic
inheritance is controlled by more than 1 gene. Offspring will be an intermediate between
the parents, most likely average for the characteristic. Ex: human height, weight, & eye
color.
What are the difference between sex chromosomes & autosomes? - Correct Answer Sex
chromosomes are Pair #23 in humans. Pairs #1-22 are the autosomal chromosomes.
Most traits are carried by the autosomal and the male/female determination by the sex
chromosome.
Describe the theory of Evolution - Correct Answer Evolution is the change in the gene
frequencies of a population over time.
New alleles that enter a population through genetic mutation arise what? - Correct
Answer New adaptations
, Describe convergent evolution - Correct Answer Convergent evolution: The process by
which unrelated species come to resemble one another due to adaptations to similar
environments
Natural Selection is the process by which organisms who are better adapted for an
environment are more likely to survive & reproduce. True or False - Correct Answer True
Describe the likeness between species on the mainland of South America & the
Galapagos Island? Who explained these differences? - Correct Answer Charles Darwin
hypothesized that the species on the Galapagos Islands were descendants of species
that colonized the islands from the mainland. The current species had descended over
time & adapted to the island environment, so they showed differences but still resembled
the ancestors.
Divergent Evolution is the process by which one species descent from a common
ancestor with changes over time. True or False - Correct Answer False - several
descents
Phosphate, sugar, & nitrogenous base are the 3 parts of what, describe sugar's role in
DNA and RNA, what parts are the backbone? - Correct Answer 3 parts of Nucleotide
DNA - sugar is deoxyribose
RNA- sugar is ribose
Backbone - is phosphate molecule & sugar
Describe tRNA and what is it used for? - Correct Answer tRNA brings the free amino
acids to the rRNA site so that a protein chain can be made.
It is the study of how organisms interact with each other & their environment. - Correct
Answer What is Ecology
Ecology is organized in 6 levels what are they & what do they describe? - Correct Answer
Species Level - individuals
Population Level - organisms of the same species that interact with one another
Community Level - all the living organisms (biotic factors) in an environment - includes
animals, plants, bacteria, fugi
Ecosystem Level - All the living (biotic) AND nonliving (abiotic) factors in an environment
& their interactions
Verified Answers.
What is mRna and what is used for? - Correct Answer Copies the DNA code so that it can
leave the nucleus; takes the code to the rRNA site
Adenine, Thymine, Cytosine, & Guanine are what? - Correct Answer The 4 nitrogen
bases in DNA
What are the 4 nitrogen base pairs for RNA ? - Correct Answer A-U & C-G
rRna, forms the complex at the ribosome the serves as the site where proteins are made.
True or False - Correct Answer True
An allele is a variation of a gene? True or False - Correct Answer True
Bb = genotype of heterozygous individual & the phenotype would be black hair results
from results from what dominate hair type and recessive? - Correct Answer Black hair is
dominant & yellow is recessive
Describe & provide and example of a polygenic inheritance? - Correct Answer Polygenic
inheritance is controlled by more than 1 gene. Offspring will be an intermediate between
the parents, most likely average for the characteristic. Ex: human height, weight, & eye
color.
What are the difference between sex chromosomes & autosomes? - Correct Answer Sex
chromosomes are Pair #23 in humans. Pairs #1-22 are the autosomal chromosomes.
Most traits are carried by the autosomal and the male/female determination by the sex
chromosome.
Describe the theory of Evolution - Correct Answer Evolution is the change in the gene
frequencies of a population over time.
New alleles that enter a population through genetic mutation arise what? - Correct
Answer New adaptations
, Describe convergent evolution - Correct Answer Convergent evolution: The process by
which unrelated species come to resemble one another due to adaptations to similar
environments
Natural Selection is the process by which organisms who are better adapted for an
environment are more likely to survive & reproduce. True or False - Correct Answer True
Describe the likeness between species on the mainland of South America & the
Galapagos Island? Who explained these differences? - Correct Answer Charles Darwin
hypothesized that the species on the Galapagos Islands were descendants of species
that colonized the islands from the mainland. The current species had descended over
time & adapted to the island environment, so they showed differences but still resembled
the ancestors.
Divergent Evolution is the process by which one species descent from a common
ancestor with changes over time. True or False - Correct Answer False - several
descents
Phosphate, sugar, & nitrogenous base are the 3 parts of what, describe sugar's role in
DNA and RNA, what parts are the backbone? - Correct Answer 3 parts of Nucleotide
DNA - sugar is deoxyribose
RNA- sugar is ribose
Backbone - is phosphate molecule & sugar
Describe tRNA and what is it used for? - Correct Answer tRNA brings the free amino
acids to the rRNA site so that a protein chain can be made.
It is the study of how organisms interact with each other & their environment. - Correct
Answer What is Ecology
Ecology is organized in 6 levels what are they & what do they describe? - Correct Answer
Species Level - individuals
Population Level - organisms of the same species that interact with one another
Community Level - all the living organisms (biotic factors) in an environment - includes
animals, plants, bacteria, fugi
Ecosystem Level - All the living (biotic) AND nonliving (abiotic) factors in an environment
& their interactions
