Cellular Specialization

What is the significance of cell differentiation in multicellular organisms?

• It allows cells to perform the same function

• It allows cells to become specialized and perform different functions

• It causes cells to die

• It prevents cells from dividing

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What happens to the fur color of Himalayan rabbits in warm parts of their body?

• The fur turns black

• The fur turns white

• The fur turns brown

• The fur turns grey

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Which of the following is NOT listed as a factor influencing gene expression in cells?

• Available nutrients

• Salinity

• Temperature

• Gravity

What is an example of a process controlled by temperature, available resources, and hormones?

• Metamorphosis of a tadpole into an adult frog

• Photosynthesis in plants

• Digestion in humans

• Respiration in fish

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Which of the following is an internal factor that can influence gene expression?

• Light

• Hormones

• Salinity

• Temperature

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What do the resulting proteins from gene regulation help the cell to do?

• Die

• Stop growing

• Divide (grow)

• Deactivate the receptor protein

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How can gene expression be regulated?

• By making the chromatin more compact

• By making the chromatin more relaxed in its structure

• By making the DNA helix more compact

• By making the nucleosome more relaxed in its structure

Which of the following is NOT a component shown in the diagram?

• Chromosome

• Chromatin

• Ribosome

• Nucleosome

Which of the following is NOT a part of mRNA processing?

• Addition of a cap.

• Addition of a tail.

• Removal of non-coding segments.

• Translation of mRNA.

What is the role of the cap added during mRNA processing?

• To protect mRNA from degradation.

• To help mRNA bind to ribosomes.

• To signal the end of transcription.

• To initiate DNA replication.