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WorksheetsBiology - Unit 4 Test Prep
Total questions: 15
Worksheet time: 10mins
Which of the following technologies uses electricity to sort DNA fragments based on their sizes?
Genetic engineering
Gel electrophoresis
Genetic screening
Gene splicing
What is one of the benefits of genetic engineering of plants?
Increased allergies to plants and pollen
Elimination of natural crop pollinators
Reduced diversity among crop plants
Enhanced disease resistance in crops
Which component of nucleic acids' structure allows them to perform their main
function?
Each base pairs with a specific other base, allowing the sequence of bases to
be read and replicated
The sugar-phosphate backbone provides insulation, protecting nucleic acids
from outside forces
The sugar-phosphate backbone acts as a catalyst, breaking food down into
component parts
The nitrogenous bases form a thick sheet that provides structural support
Which type of mutation often has the least effect on organisms’ traits (and may have no effect at all)?
Nondisjunction
Substitution
Insertion
Deletion
What happens during translation?
The DNA is replicated
A protein is synthesized
mRNA is created from the DNA’s code
The mRNA’s message leaves the nucleus
Which of the following can cause mutations that can be inherited by an organism’s
offspring?
Viruses, radiation, chemicals
physical damge to body cells
If a cell's DNA contains 20% Adenine, what percent of the cell's DNA will be
Cytosine?
80%
60%
30%
20%
Which type of nucleic acid is this, and what role will it play in the protein synthesis
process? (Use YOUR codon charts .)
tRNA – It will leave behind Methionine so the ribosome can use it to make a protein, if the mRNA tells it to
tRNA – It will leave behind Tyrosine so the ribosome can use it to make a
protein, if the mRNA tells it to.
mRNA – It will instruct the ribosome to make a protein with Methionine.
mRNA – It will instruct the ribosome to make a protein with Tyrosine
A DNA strand has the codon GAT. According to the codon charts, the corresponding
messenger RNA codes for which of the following amino acids?
Alanine
Leucine
Glycine
Serine
Which statement is true of mutations found in the DNA of sex cells?
If the sex cells create an offspring, the mutations will result in increased
genetic variation within the species
If the sex cells create an offspring, the mutations will harm the offspring
The mutations will prevent the sex cells from creating an offspring
The mutations will not be passed on to future generations
A cell’s DNA permanently loses one of its strands. Which cellular process would be
most affected?
Transport across the cell membrane (the ability of the cell to bring in the
resources it needs and remove molecules it doesn’t need)
Cellular respiration (the ability of the cell to convert food into energy)
Cellular reproduction (the ability of the cell to reproduce)
Photosynthesis (the ability of the cell to make food)
How are cloning and genetic modification through gene insertion different?
Cloning is a less reliable way of getting the desired traits in an organism than
gene insertion is
Cloning reduces genetic variation in the population; gene insertion does not
Cloning presents fewer ethical concerns than gene insertion
Cloning is a faster process than gene insertion
A cell’s mRNA loses all of its uracil. What will happen next?
Instead of participating in the protein synthesis process, it will start assisting
in the replication of DNA
DNA will no longer be able to replicate
The wrong proteins will be made
All of the above are likely consequences
An organism’s DNA contains the following base sequence: GTC AGC CTA. A mutation during gamete formation changes the base sequence to GTT TCA CTG. What will be the result for the organism’s offspring?
If the organism’s offspring survive, they will have traits (ex: colors) not
previously found in the population
No offspring will be able to survive such a significant change in the genetic
code
The mutation will have no effect on the offspring’s traits
There’s not enough information to answer this question.
All of the following can cause mutations that can be inherited by an organism’s
offspring, EXCEPT?
Viruses
Radiation
Chemicals
Physical damage to body cells
