The extra sequences of nucleotides that are excised out of the mRNA prior to leaving the nucleus are called ________
A) exons
B) vestigial sequences
C) tRNA
D) introns
D
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A cell-signaling molecule that is fat-soluble __________
a. must bind to a receptor on the cell membrane before entering the cell b. can pass through the cell membrane of a cell c. is unable to pass through the cell membrane of a cell d. is not as effective as a water-soluble signaling molecule
Four of the five answers listed below are parts of the inner ear. Select the exception
a. eardrum b. oval window c. semicircular canals d. auditory nerve e. cochlea
What does antidiuretic hormone do?
a. increases glucose reabsorption b. decreases the filtration rate c. increases tubular secretion d. increases water reabsorption e. decreases amino acid reabsorption
Human body cells have 46 pairs of chromosomes. Body cells are known as _________ and are __________ These cells are created by mitosis .
Fill in the blank(s) with the appropriate word(s).