Which of the following structures contains the receptor protein importin?

A) mitochondrion
B) nucleolus
C) chloroplast
D) plastid
E) nucleus


Answer: E

Biology & Microbiology

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Subunits sometimes build up to form a macromolecule. Which molecule is least likely to be a subunit of a macromolecule?

A. Glucose B. Amino acids C. Steroids D. Fatty acids E. Nucleotides

Biology & Microbiology

Suppose sugar is removed from an excretory system tubule and returned to the blood. This would be an example of

____.

a. reabsorption b. excretion c. filtration d. secretion e. diffusion

Biology & Microbiology

The genes for the enzymes of glycolysis

A) are present in all metabolizing cells, but the genes for specialized proteins are expressed only in particular cell types. B) are present in all metabolizing cells, and the genes for specialized proteins are expressed in all cell types. C) and the genes for all specialized proteins are expressed in all metabolizing cells. D) and the genes for all specialized proteins are expressed in all embryonic cells.

Biology & Microbiology

The concept of a species was proposed by

A. John Ray. B. George Cuvier. C. Charles Darwin. D. Erasmus Darwin. E. Carolus Linneaus.

Biology & Microbiology