How are proteins sorted into their appropriate cell compartments in eukaryotes?
What will be an ideal response?
Proteins with specific "signal" sequences (a hydrophobic amino terminal extension) are directed to the ER during translation, while proteins without signal sequences remain in the cytoplasm. Inside the space of the ER, the signal sequence is removed from the polypeptide. The protein is modified further by addition of specific carbohydrate groups that direct them to their final destination.
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What process occurs when complex molecules are synthesized from simpler substances?
a. anabolism b. catabolism c. metabolism d. condensation e. phosphorylation
What two tissues transport materials throughout the entire plant body?
a. sclerenchyma and xylem b. phloem and xylem c. parenchyma and xylem d. sclerenchyma and collenchyma e. epidermis and xylem
In eukaryotic cells, the hydrogens that go through the electron transport system from one sugar (glucose) molecule produce
A. six ATPs. B. eight ATPs. C. seventy-six ATPs. D. thirty-two ATPs.
Convergent evolution refers to:
A. the evolution of a different character more than once in separate groups. B. the evolution of the same character more than once in separate groups. C. the evolution of the same character in related groups. D. the evolution of a different character in related groups.