WorksheetsBio Air Test Practice Quiz
Total questions: 20
Worksheet time: 11mins
Scientists and doctors have observed that many species of bacteria are no longer susceptible to antibiotics that were once effective.
Which statement explains why some bacteria species are no longer susceptible to certain antibiotics?
The bacteria learned to avoid the antibiotics.
The bacteria modified the antibiotics to make them more effective.
The bacteria that survived the antibiotics passed that resistance to future generations.
The bacteria that were susceptible to the antibiotics produced a greater number of offspring
The transcription of a DNA molecule into an mRNA molecule, and the translation of that mRNA molecule, can occur simultaneously in prokaryotic cells. This does not occur in eukaryotic cells.
Which statement explains why transcription and translation can occur simultaneously in prokaryotic cells but not In eukaryotic cells?
Prokaryotic cells have more mitochondria to produce energy.
Prokaryotic cells lack a nucleus to separate the two processes.
Eukaryotic cells do not create amino acids until transcription is complete.
Eukaryotic cells lack ribosomes to translate the mRNA for protein synthesis.
The diagram shows the karyotype of a muscle cell from a wild sheep.
Select the three correct statements based on Information contained in this karyotype.
A
The sheep is a male.
Sheep gametes contain 27 chromosomes.
Sheep somatic cells are diploid.
Sheep somatic cells are haploid.
Sheep gametes contain 26 chromosomes.
For normal nerve transmission in mammals, nerve cells maintain specific concentrations of potassium (K+) and sodium (Na+) ions. Concentrations of Na+ ions are normally higher outside the cell and lower inside the cell, while K+ Ions are normally lower outside the cell and higher Inside the cell. However, cell membranes are Impermeable to Na+ and K+ ions. The diagram shows the relative concentrations of ions In solution inside and outside the cell.
Which process describes how a nerve cell maintains homeostasis In regards to the Na+ and K+ ion concentrations?
by converting the sodium ions present inside the cell into potassium ions
by blocking both types of ions from moving into or out of the cell membrane
by transporting both types of ions through protein pumps within the cell membrane
by producing more potassium ions inside the cell and eliminating sodium ions as waste
A table shows Information about several traits displayed by different groups of plants.
(a)
Select the two most derived groups of plants that share the most recent common ancestor.
algae
ferns
gingko
spruce
Select each trait shared among the most recent common ancestor that you identified in Part A and its descendant groups.
cones
flowers
needles
cuticles
stomata
Which statement explains the relationships among gingko, spruce, and wheat?
These three plant groups are all equally related.
Gingkos are more ancient than spruce or wheat.
A group that contains gingko and spruce is the ancestor of wheat.
Spruce share an ancestor with a group that contains gingko and wheat.
Sponges are marine organisms that can reproduce both sexually and asexually. Gel electrophoresis was used to analyze the DNA of six sponges (A-F) that share a common parent. The gel electrophoresis results are shown.
Select all of the sponges that were most likely produced by asexual reproduction.
A
B
C
D
E
The sand goby Is a small fish found in Europe's Baltic Sea. During mate selection, females overwhelmingly choose males with large body sizes. In some parts of the Baltic, algae overgrowths are causing the water to become increasingly cloudy. In the cloudy water, females have trouble identifying the larger males.
What can you predict will happen if female sand gobies continue to have difficulty identifying large males during mate selection?
There will be a change in how often genes for large size occur in the population.
There will be an increase in resource competition between large and small males.
There will be an immigration of a new sand goby population from a different habitat.
There will be a mutation in the genes for eyesight that will improve vision in the females.
Which diagram shows how RNA is read to produce an amino acid chain?
Which amino acid chain would be built from the RNA segment ...UGUGUGUGUGUG...?
...Cys-Cys-Cys-Cys...
...Val-Val-Val-Val...
...Cys-Val-Cys-Val...
...Cys-Val-Gly-His...
Students investigate the effects of a single base mutation that occurs in a piece of DNA. The diagram shows the first 15 bases of the DNA template they are investigating. A thymine (T) nucleotide is mistakenly added between adenine (A) and cytosine (C) at the location marked by the arrow.
Which mRNA sequence is produced from the mutated DNA template?
ATG TCG TAG GAT CCG G ...
TAC AGC ATC CTA GGC C ..
UAC AGC AUC CUA GGC C ...
AUG UCG UAG GAU CCG G ...
Select all of the effects of the mutation on the protein produced from the previous question.
The protein will be shorter.
The protein will function differently.
The protein will gain an additional active site.
The protein will have a more complex structure.
The protein will be the same length but will have a different amino acid sequence.
Scientists use a two-part naming system to give a unique scientific name to each species on Earth. However, many people use common names to refer to different species. The table shows one example of scientific and common names for one species of mammal.
Select two statements that describe a benefit of using scientific names to Identify a species.
• There may be more than one correct answer.
Scientific names are difficult to pronounce.
Scientific names are not used interchangeably among similar species.
Scientific names help scientists understand how different species are related.
Scientific names must fit a particular set of rules before they can be assigned.
Scientific names can be changed if scientists discover new information about the species.
A protein is built from several polypeptides, each with a different three-dimensional folding pattern.
What causes the polypeptides to have different folding patterns?
The polypeptides are assembled by different ribosomes.
The polypeptides are assembled in different parts of the cell
The polypeptides are composed of different amino acid sequences.
The polypeptides are controlled by different gene expression processes.
The graph shows the diversity of marine Invertebrates over the last 300 million years. Three time periods are marked in the graph.
Select the boxes to match the three time periods to each of the environmental descriptions.
Marine environments remained relatively stable.
Time 1
Time 2
Time 3
The graph shows the diversity of marine Invertebrates over the last 300 million years. Three time periods are marked in the graph.
Select the boxes to match the three time periods to each of the environmental descriptions.
Unused resources and ecological niches were available in the environment..
Time 1
Time 2
Time 3
The graph shows the diversity of marine Invertebrates over the last 300 million years. Three time periods are marked in the graph.
Select the boxes to match the three time periods to each of the environmental descriptions.
Volcanic eruptions significantly reduced the amount of dissolved oxygen In the oceans.
Time 1
Time 2
Time 3
Scientists introduce a small population of reindeer onto a remote island. The reindeer population adapts to the island's ecosystem without the threat of any natural predators by relying on the local lichen (fungi and algae) as a food source. The graph shows the population of reindeer on the island over time.
Which statement explains a possible cause for the change in the reindeer population over time, as shown in the graph?
The reindeer population never reaches equilibrium.
The reindeer and the lichen share a symbiotic relationship.
The Island's resources could not sustain the reindeer population.
The rate of reindeer births on the island was equal to the rate of reindeer deaths.
Researchers studying hummingbirds in the Andes Mountains of Ecuador made several observations:
There are many species of hummingbirds.
The species are not separated by any physical barriers.
Unique hummingbird species are found at different elevations in the Andes.
Which hypothesis is based on these observations?
Conditions at each elevation favor different hummingbird traits.
All hummingbird species are able to interbreed at every elevation
Elevation changes cause hummingbirds to develop new methods of transportation.
Individual hummingbirds choose food sources based on their preferences for specific plants
