The digestion and utilization of this material creates the greatest need for nitrogenous waste secretion by the kidneys.
A. collagen
B. amylose
C. oleic acid
D. glucose
E. lactose
A. collagen
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Which of the following could explain how some (although rare) people can have Down syndrome and have a normal chromosome number?
A. One of the cells during development had trisomy 21 but then died. B. A large enough fragment of chromosome number 21 underwent a duplication event. C. A large enough fragment of chromosome number 21 underwent a deletion. D. Some of the genes in one chromosome number 21 are mutated. E. None of the answer options explains this observation.
Proteins that are loosely associated with the cytoplasmic membrane are called ________ proteins.
A. external B. internal C. peripheral D. integral
The DNA sequence capable of pairing with 5' CGATTAGT 3' is:
A. 3' GCTAATCA 5'. B. 5' GCTAATCA 3'. C. 3' CGATTAGT 5'. D. 5' CGATTAGT 3'.
A cell that is 98% water is placed in a solution containing 3% salt. This cell is now _________ compared to its surroundings.
A. isotonic B. hypertonic C. hypotonic D. hydrophilic