Cell Structure and Function
If a mutation occurs in the DNA of an organism's skin cell, how will this most likely affect future generations?
It will cause all offspring to inherit the mutation as it changes the genetic material of gametes.
The mutation might skip a generation before appearing in the phenotype of grandchildren.
It will not affect future generations as mutations in somatic cells are not heritable.
It will impact only half of the offspring depending on which allele is passed on during sexual reproduction.
Which cellular structure is most directly involved in synthesizing proteins that will be exported from the cell?
Golgi apparatus.
Mitochondria.
Rough endoplasmic reticulum.
Smooth endoplasmic reticulum.
In what way can sexual selection affect allele frequencies in a population where males display elaborate traits to attract females?
All allele frequencies will remain constant as every male has an equal chance at reproduction regardless of their traits.
Sexual selection will evenly distribute all allele frequencies because male traits vary widely.
Allele frequencies may shift towards those that code for more attractive traits due to female mate choice preferences.
Sexual selection is irrelevant since natural selection is the only process affecting allele frequencies.
Considering a cell with a high surface area to volume ratio, which adaptation would most likely support its rapid growth in an environment with abundant nutrients?
Reduction in nucleocytoplasmic transport.
Increased density of ribosomes.
Expansion of the extracellular matrix.
Decreased number of mitochondria.
How could an increase in ocean temperatures influence marine trophic structures?
Increasing ocean salinity, thus reducing the need for osmoregulation in marine animals
Inducing more rapid water evaporation and increased rainfall on land ecosystems
By causing shifts in species distributions, leading to changes in predator-prey relationships
Enhancing photosynthetic rates universally across all phytoplankton species
How might a unicellular organism residing in hypotonic freshwater environments maintain cellular integrity despite osmotic challenges?
Osmoregulatory channels importing more solutes into the cell.
High turgor pressure within a rigid cell wall structure.
Lipid bilayer permeability increasing to allow water outflow.
Cytoplasmic contractile vacuoles expelling excess water.
Which of the following types of cells would have the largest surface area-to-volume ratio?
Bacterial cells
All cells have the same surface area-to-volume ratio
Plant cells
Animal cells

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What role does the nucleus play in maintaining a relationship between structure and function at a cellular level?
The nucleus houses DNA which directs synthesis of specific proteins that determine cell structure and function.
Nucleoli produce ribosomal RNA, important protection against UV radiation damage.
Mitotic spindle formation originates centrally within nuclei, facilitating equal division.
Nuclei regulate extracellular fluid composition, directly affecting cytoplasmic functions.
Why are cells small and not large like organs?
Cells are small because they do not contain complex structures like organelles.
Larger cells would require more energy than what could be sustainably produced.
Small size allows for an efficient exchange of materials across the cell membrane.
Small cells can reproduce faster than larger ones, promoting genetic diversity.
If a cell has a larger volume, what is the most likely effect on its surface area-to-volume ratio?
The ratio remains constant.
The ratio increases.
The ratio decreases.
The ratio fluctuates unpredictably.